customer.io Open in urlscan Pro
76.76.21.21 Public Scan

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Submitted URL:
http://customeriomail.com/track?id=12345
Effective URL:
https://customer.io/track?id=12345
Submission: On January 15 via api (January 15th 2026, 5:43:39 am UTC) from CH — Scanned from DE

Summary HTTP 39 Redirects Behaviour Indicators

Summary

This website contacted 2 IPs in 1 countries across 3 domains to perform 39 HTTP transactions. The main IP is 76.76.21.21, located in Walnut, United States and belongs to AMAZON-02, US. The main domain is customer.io. The Cisco Umbrella rank of the primary domain is 8049.
TLS certificate: Issued by R12 on December 21st 2025. Valid for: 3 months.

This is the only time customer.io was scanned on urlscan.io!

urlscan.io Verdict: No classification

Domain & IP information

	IP Address	AS Autonomous System
1 1	16.15.223.37 16.15.223.37	14618 (AMAZON-AES) (AMAZON-AES)
38	76.76.21.21 76.76.21.21	16509 (AMAZON-02) (AMAZON-02)
39	2

1 16.15.223.37 (Ashburn, United States) 1 redirects

ASN14618 (AMAZON-AES, US)

customeriomail.com	Domain lookup VirusTotal SecurityTrails crt.sh Domaintools

38 76.76.21.21 (Walnut, United States)

ASN16509 (AMAZON-02, US)

customer.io	Domain lookup VirusTotal SecurityTrails crt.sh Domaintools

	Apex Domain Subdomains	Transfer
38	customer.io customer.io — Cisco Umbrella Rank: 8049	701 KB
1	customeriomail.com 1 redirects customeriomail.com — Cisco Umbrella Rank: 55622	299 B
0	googletagmanager.com Failed www.googletagmanager.com Failed
39	3

	Domain	Requested by
38	customer.io	customer.io
1	customeriomail.com	1 redirects
0	www.googletagmanager.com Failed	customer.io
39	3

This site contains no links.

Subject Issuer	Validity	Valid
customer.io R12	`2025-12-21` - `2026-03-21`	3 months	crt.sh

This page contains 1 frames:

Primary Page: https://customer.io/track?id=12345
Frame ID: B6615FE1B8C82691E590083253954228
Requests: 39 HTTP requests in this frame

Screenshot
Live screenshot

Full Image

Page Title

404 | Customer.io

Page URL History Show full URLs

http://customeriomail.com/track?id=12345 HTTP 307
https://customeriomail.com/track?id=12345 HTTP 307
http://customeriomail.com/track?id=12345 HTTP 301
http://customer.io/track?id=12345 HTTP 307
https://customer.io/track?id=12345 Page URL

Page Statistics

39
Requests

97 %
HTTPS

0 %
IPv6

3
Domains

3
Subdomains

2
IPs

1
Countries

701 kB
Transfer

2124 kB
Size

0
Cookies

0 Outgoing links

These are links going to different origins than the main page.

Page URL History

This captures the URL locations of the websites, including HTTP redirects and client-side redirects via JavaScript or Meta fields.

http://customeriomail.com/track?id=12345 HTTP 307
https://customeriomail.com/track?id=12345 HTTP 307
http://customeriomail.com/track?id=12345 HTTP 301
http://customer.io/track?id=12345 HTTP 307
https://customer.io/track?id=12345 Page URL

Redirected requests

There were HTTP redirect chains for the following requests:

39 HTTP transactions
0 data transactions

Method
Protocol Status Resource
Path Size
x-fer Time
Latency Type
MIME-Type IP
Location

GET
H2

404

Primary Request track Show response
customer.io/
Redirect Chain

http://customeriomail.com/track?id=12345
https://customeriomail.com/track?id=12345
http://customeriomail.com/track?id=12345
http://customer.io/track?id=12345
https://customer.io/track?id=12345

143 KB
18 KB

767ms
732ms

Document
text/html

76.76.21.21
AMAZON-02

General

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Full URL

https://customer.io/track?id=12345

Protocol

Security

TLS 1.3, , AES_128_GCM

Server

76.76.21.21 Walnut, United States, ASN16509 (AMAZON-02, US),

Reverse DNS

Software

Vercel / Next.js

Resource Hash

82fe8d3cfe27dd993652b233fb63d2af577ffaf3cc243eee83d6b792fb817c49

Security Headers

Name	Value
Strict-Transport-Security	max-age=63072000

Request headers

Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36

Response headers

access-control-allow-headers: next-router-prefetch, Content-Type, Authorization
access-control-allow-methods: GET, POST, PUT, DELETE, OPTIONS
access-control-allow-origin: *
age: 0
cache-control: private, no-cache, no-store, max-age=0, must-revalidate
content-encoding: br
content-type: text/html; charset=utf-8
date: Thu, 15 Jan 2026 05:43:43 GMT
link: </_next/static/media/13d948bc5b1ae448-s.p.woff2>; rel=preload; as="font"; crossorigin=""; type="font/woff2", </_next/static/css/b2751df8aec321e5.css>; rel=preload; as="style", </_next/static/css/d4bbcd804e59c6d9.css>; rel=preload; as="style"
server: Vercel
strict-transport-security: max-age=63072000
vary: rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch
x-matched-path: /[...slug]
x-powered-by: Next.js
x-vercel-cache: MISS
x-vercel-id: fra1::iad1::wzj8g-1768455823095-4b6f66a2e839

Redirect headers

Location: https://customer.io/track?id=12345
Non-Authoritative-Reason: HttpsUpgrades

GET
H2 200 13d948bc5b1ae448-s.p.woff2
customer.io/_next/static/media/ 90 KB
90 KB 15ms
15ms Font
font/woff2 76.76.21.21
AMAZON-02

General

Check archive.org

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Full URL

https://customer.io/_next/static/media/13d948bc5b1ae448-s.p.woff2

Protocol

Security

TLS 1.3, , AES_128_GCM

Server

76.76.21.21 Walnut, United States, ASN16509 (AMAZON-02, US),

Reverse DNS

Software

Vercel /

Resource Hash

7fb3c0d09dd43f5961d21aa087713f1a70a26466b0b0d37abd6159066d4578d3

Security Headers

Name	Value
Strict-Transport-Security	max-age=63072000

Request headers

User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36
Origin: https://customer.io
Referer: https://customer.io/track?id=12345

Response headers

etag: "b430649af8ba864ab910bc9a6ed79db3"
age: 2018061
access-control-allow-methods: GET, POST, PUT, DELETE, OPTIONS
x-matched-path: /_next/static/media/13d948bc5b1ae448-s.p.woff2
date: Thu, 15 Jan 2026 05:43:43 GMT
content-disposition: inline; filename="13d948bc5b1ae448-s.p.woff2"
content-type: font/woff2
last-modified: Mon, 22 Dec 2025 21:09:22 GMT
access-control-allow-headers: next-router-prefetch, Content-Type, Authorization
strict-transport-security: max-age=63072000
cache-control: public,max-age=31536000,immutable
x-vercel-cache: HIT
accept-ranges: bytes
access-control-allow-origin: *
content-length: 91736
server: Vercel
x-vercel-id: fra1::fk796-1768455823839-3fdfb386a97a

GET
H2 200 b2751df8aec321e5.css
customer.io/_next/static/css/ 119 KB
21 KB 35ms
35ms Stylesheet
text/css 76.76.21.21
AMAZON-02

General

Check archive.org

Download Go to

Full URL

https://customer.io/_next/static/css/b2751df8aec321e5.css

Protocol

Security

TLS 1.3, , AES_128_GCM

Server

76.76.21.21 Walnut, United States, ASN16509 (AMAZON-02, US),

Reverse DNS

Software

Vercel /

Resource Hash

3d931c3f45ee72bb744aca559e89cda1ebdbdb8f6833f63fcb6cea92a374de91

Security Headers

Name	Value
Strict-Transport-Security	max-age=63072000

Request headers

User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36
Referer: https://customer.io/track?id=12345

Response headers

content-encoding: br
etag: "c14a54ab2b222a186f6006c51e44431d"
age: 253095
access-control-allow-methods: GET, POST, PUT, DELETE, OPTIONS
x-matched-path: /_next/static/css/b2751df8aec321e5.css
date: Thu, 15 Jan 2026 05:43:43 GMT
content-disposition: inline; filename="b2751df8aec321e5.css"
content-type: text/css; charset=utf-8
last-modified: Mon, 12 Jan 2026 07:25:28 GMT
access-control-allow-headers: next-router-prefetch, Content-Type, Authorization
strict-transport-security: max-age=63072000
cache-control: public,max-age=31536000,immutable
x-vercel-cache: HIT
accept-ranges: bytes
access-control-allow-origin: *
content-length: 21714
server: Vercel
x-vercel-id: fra1::xrg4z-1768455823838-89adbb4da86d

GET
H2 200 d4bbcd804e59c6d9.css
customer.io/_next/static/css/ 476 B
785 B 69ms
69ms Stylesheet
text/css 76.76.21.21
AMAZON-02

General

Check archive.org

Download Go to

Full URL

https://customer.io/_next/static/css/d4bbcd804e59c6d9.css

Protocol

Security

TLS 1.3, , AES_128_GCM

Server

76.76.21.21 Walnut, United States, ASN16509 (AMAZON-02, US),

Reverse DNS

Software

Vercel /

Resource Hash

a2632cebb289c8115648f3a2312712e1e9611c3d8600424a1d149d9db4b60766

Security Headers

Name	Value
Strict-Transport-Security	max-age=63072000

Request headers

User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36
Referer: https://customer.io/track?id=12345

Response headers

etag: "36ff07150a688e430aa9b262fb9b23a5"
age: 254144
access-control-allow-methods: GET, POST, PUT, DELETE, OPTIONS
x-matched-path: /_next/static/css/d4bbcd804e59c6d9.css
date: Thu, 15 Jan 2026 05:43:43 GMT
content-disposition: inline; filename="d4bbcd804e59c6d9.css"
content-type: text/css; charset=utf-8
last-modified: Mon, 12 Jan 2026 07:07:59 GMT
access-control-allow-headers: next-router-prefetch, Content-Type, Authorization
strict-transport-security: max-age=63072000
cache-control: public,max-age=31536000,immutable
x-vercel-cache: HIT
accept-ranges: bytes
access-control-allow-origin: *
content-length: 476
server: Vercel
x-vercel-id: fra1::4dcr4-1768455823844-df5cf1de72ba

GET
H2 200 webpack-0b2b8c4a9523c300.js Show response
customer.io/_next/static/chunks/ 13 KB
7 KB 26ms
26ms Script
application/javascript 76.76.21.21
AMAZON-02

General

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Full URL

https://customer.io/_next/static/chunks/webpack-0b2b8c4a9523c300.js

Requested by

Host: customer.io
URL: https://customer.io/track?id=12345

Protocol

Security

TLS 1.3, , AES_128_GCM

Server

76.76.21.21 Walnut, United States, ASN16509 (AMAZON-02, US),

Reverse DNS

Software

Vercel /

Resource Hash

21e146bb0f86137d2c791c1f20bf498697ae1b0edf91afadaf1e5dfcdf6baea0

Security Headers

Name	Value
Strict-Transport-Security	max-age=63072000

Request headers

User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36
Referer: https://customer.io/track?id=12345

Response headers

content-encoding: br
etag: "3eebda35d3c4b5aa8963170d7f912b79"
age: 2018231
access-control-allow-methods: GET, POST, PUT, DELETE, OPTIONS
x-matched-path: /_next/static/chunks/webpack-0b2b8c4a9523c300.js
date: Thu, 15 Jan 2026 05:43:43 GMT
content-disposition: inline; filename="webpack-0b2b8c4a9523c300.js"
content-type: application/javascript; charset=utf-8
last-modified: Mon, 22 Dec 2025 21:06:32 GMT
access-control-allow-headers: next-router-prefetch, Content-Type, Authorization
strict-transport-security: max-age=63072000
cache-control: public,max-age=31536000,immutable
x-vercel-cache: HIT
accept-ranges: bytes
access-control-allow-origin: *
content-length: 7429
server: Vercel
x-vercel-id: fra1::drghg-1768455823853-bb5b8c44109f

GET
H2 200 f5e865f6-4ca82a29485a5989.js Show response
customer.io/_next/static/chunks/ 208 KB
67 KB 43ms
42ms Script
application/javascript 76.76.21.21
AMAZON-02

General

Check archive.org

Download Go to

Full URL

https://customer.io/_next/static/chunks/f5e865f6-4ca82a29485a5989.js

Requested by

Host: customer.io
URL: https://customer.io/track?id=12345

Protocol

Security

TLS 1.3, , AES_128_GCM

Server

76.76.21.21 Walnut, United States, ASN16509 (AMAZON-02, US),

Reverse DNS

Software

Vercel /

Resource Hash

ea59d7532e8ee86b61e107cc15142ef40c10bfa5426eadf9c71dda930bf9346f

Security Headers

Name	Value
Strict-Transport-Security	max-age=63072000

Request headers

User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36
Referer: https://customer.io/track?id=12345

Response headers

content-encoding: br
etag: "a2bd1a830db4cd2a789ef37427de9e95"
age: 2018077
access-control-allow-methods: GET, POST, PUT, DELETE, OPTIONS
x-matched-path: /_next/static/chunks/f5e865f6-4ca82a29485a5989.js
date: Thu, 15 Jan 2026 05:43:43 GMT
content-disposition: inline; filename="f5e865f6-4ca82a29485a5989.js"
content-type: application/javascript; charset=utf-8
last-modified: Mon, 22 Dec 2025 21:09:06 GMT
access-control-allow-headers: next-router-prefetch, Content-Type, Authorization
strict-transport-security: max-age=63072000
cache-control: public,max-age=31536000,immutable
x-vercel-cache: HIT
accept-ranges: bytes
access-control-allow-origin: *
content-length: 67901
server: Vercel
x-vercel-id: fra1::drghg-1768455823868-69ebefe45ed1

GET
H2 200 7706-5932120bc759eca6.js Show response
customer.io/_next/static/chunks/ 390 KB
120 KB 222ms
221ms Script
application/javascript 76.76.21.21
AMAZON-02

General

Check archive.org

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Full URL

https://customer.io/_next/static/chunks/7706-5932120bc759eca6.js

Requested by

Host: customer.io
URL: https://customer.io/track?id=12345

Protocol

Security

TLS 1.3, , AES_128_GCM

Server

76.76.21.21 Walnut, United States, ASN16509 (AMAZON-02, US),

Reverse DNS

Software

Vercel /

Resource Hash

92df91c65b61524635af188778845e2972fc2e4e19e75c77166e8cb7b1c08d01

Security Headers

Name	Value
Strict-Transport-Security	max-age=63072000

Request headers

User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36
Referer: https://customer.io/track?id=12345

Response headers

content-encoding: br
etag: "e8a97d2c1943b3a0651f7d4a70910e87"
age: 338525
access-control-allow-methods: GET, POST, PUT, DELETE, OPTIONS
x-matched-path: /_next/static/chunks/7706-5932120bc759eca6.js
date: Thu, 15 Jan 2026 05:43:44 GMT
content-disposition: inline; filename="7706-5932120bc759eca6.js"
content-type: application/javascript; charset=utf-8
last-modified: Sun, 11 Jan 2026 07:41:38 GMT
access-control-allow-headers: next-router-prefetch, Content-Type, Authorization
strict-transport-security: max-age=63072000
cache-control: public,max-age=31536000,immutable
x-vercel-cache: HIT
accept-ranges: bytes
access-control-allow-origin: *
content-length: 122053
server: Vercel
x-vercel-id: fra1::xrg4z-1768455823880-0af88181d664

GET
H2 200 main-app-b4f55442024d3420.js Show response
customer.io/_next/static/chunks/ 3 KB
1 KB 37ms
37ms Script
application/javascript 76.76.21.21
AMAZON-02

General

Check archive.org

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Full URL

https://customer.io/_next/static/chunks/main-app-b4f55442024d3420.js

Requested by

Host: customer.io
URL: https://customer.io/track?id=12345

Protocol

Security

TLS 1.3, , AES_128_GCM

Server

76.76.21.21 Walnut, United States, ASN16509 (AMAZON-02, US),

Reverse DNS

Software

Vercel /

Resource Hash

288e95db10ee42703ec149ed04df536dadb4689842b64cd3345645a5ea86e94f

Security Headers

Name	Value
Strict-Transport-Security	max-age=63072000

Request headers

User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36
Referer: https://customer.io/track?id=12345

Response headers

content-encoding: br
etag: "1390336d788631b32ba27e129194c20c"
age: 1998429
access-control-allow-methods: GET, POST, PUT, DELETE, OPTIONS
x-matched-path: /_next/static/chunks/main-app-b4f55442024d3420.js
date: Thu, 15 Jan 2026 05:43:43 GMT
content-disposition: inline; filename="main-app-b4f55442024d3420.js"
content-type: application/javascript; charset=utf-8
last-modified: Tue, 23 Dec 2025 02:36:34 GMT
access-control-allow-headers: next-router-prefetch, Content-Type, Authorization
strict-transport-security: max-age=63072000
cache-control: public,max-age=31536000,immutable
x-vercel-cache: HIT
accept-ranges: bytes
access-control-allow-origin: *
content-length: 1075
server: Vercel
x-vercel-id: fra1::hbx27-1768455823869-93c64b6122bf

GET
H2 200 0e5ce63c-cf6df035587bb2dd.js Show response
customer.io/_next/static/chunks/ 7 KB
2 KB 18ms
15ms Script
application/javascript 76.76.21.21
AMAZON-02

General

Check archive.org

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Full URL

https://customer.io/_next/static/chunks/0e5ce63c-cf6df035587bb2dd.js

Requested by

Host: customer.io
URL: https://customer.io/_next/static/chunks/webpack-0b2b8c4a9523c300.js

Protocol

Security

TLS 1.3, , AES_128_GCM

Server

76.76.21.21 Walnut, United States, ASN16509 (AMAZON-02, US),

Reverse DNS

Software

Vercel /

Resource Hash

27fa86e63e3bf835d9eff4101cdd098e2ea5289723ce711e0f0c34b62407c9c8

Security Headers

Name	Value
Strict-Transport-Security	max-age=63072000

Request headers

User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36
Referer: https://customer.io/

Response headers

content-encoding: br
etag: "089fe67c222c5d3d09847851aa7a22cd"
age: 2018061
access-control-allow-methods: GET, POST, PUT, DELETE, OPTIONS
x-matched-path: /_next/static/chunks/0e5ce63c-cf6df035587bb2dd.js
date: Thu, 15 Jan 2026 05:43:44 GMT
content-disposition: inline; filename="0e5ce63c-cf6df035587bb2dd.js"
content-type: application/javascript; charset=utf-8
last-modified: Mon, 22 Dec 2025 21:09:23 GMT
access-control-allow-headers: next-router-prefetch, Content-Type, Authorization
strict-transport-security: max-age=63072000
cache-control: public,max-age=31536000,immutable
x-vercel-cache: HIT
accept-ranges: bytes
access-control-allow-origin: *
content-length: 2138
server: Vercel
x-vercel-id: fra1::skzb8-1768455824167-4635105e1cc3

GET
H2 200 94730671-9eca7bc3288913bf.js Show response
customer.io/_next/static/chunks/ 8 KB
3 KB 31ms
28ms Script
application/javascript 76.76.21.21
AMAZON-02

General

Check archive.org

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Full URL

https://customer.io/_next/static/chunks/94730671-9eca7bc3288913bf.js

Requested by

Host: customer.io
URL: https://customer.io/_next/static/chunks/webpack-0b2b8c4a9523c300.js

Protocol

Security

TLS 1.3, , AES_128_GCM

Server

76.76.21.21 Walnut, United States, ASN16509 (AMAZON-02, US),

Reverse DNS

Software

Vercel /

Resource Hash

c8be785c8605453bd009081b6ca2dfc784c53a79941e92256583925ee4d46d06

Security Headers

Name	Value
Strict-Transport-Security	max-age=63072000

Request headers

User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36
Referer: https://customer.io/

Response headers

content-encoding: br
etag: "2f7fa402fbdbcc2ab0bf0afb29beebe0"
age: 2018061
access-control-allow-methods: GET, POST, PUT, DELETE, OPTIONS
x-matched-path: /_next/static/chunks/94730671-9eca7bc3288913bf.js
date: Thu, 15 Jan 2026 05:43:44 GMT
content-disposition: inline; filename="94730671-9eca7bc3288913bf.js"
content-type: application/javascript; charset=utf-8
last-modified: Mon, 22 Dec 2025 21:09:23 GMT
access-control-allow-headers: next-router-prefetch, Content-Type, Authorization
strict-transport-security: max-age=63072000
cache-control: public,max-age=31536000,immutable
x-vercel-cache: HIT
accept-ranges: bytes
access-control-allow-origin: *
content-length: 2695
server: Vercel
x-vercel-id: fra1::qgt2g-1768455824172-01f21927ddbe

GET
H2 200 bf76e631-3d1653eeca0f4035.js Show response
customer.io/_next/static/chunks/ 130 KB
40 KB 34ms
31ms Script
application/javascript 76.76.21.21
AMAZON-02

General

Check archive.org

Download Go to

Full URL

https://customer.io/_next/static/chunks/bf76e631-3d1653eeca0f4035.js

Requested by

Host: customer.io
URL: https://customer.io/_next/static/chunks/webpack-0b2b8c4a9523c300.js

Protocol

Security

TLS 1.3, , AES_128_GCM

Server

76.76.21.21 Walnut, United States, ASN16509 (AMAZON-02, US),

Reverse DNS

Software

Vercel /

Resource Hash

2a446441e8337e6aae38b4b3ea94eb51cc545a821a5bb507bb5de2eb9052bb75

Security Headers

Name	Value
Strict-Transport-Security	max-age=63072000

Request headers

User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36
Referer: https://customer.io/

Response headers

content-encoding: br
etag: "2014a439fa9f290132ec22c748ab3987"
age: 2018077
access-control-allow-methods: GET, POST, PUT, DELETE, OPTIONS
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Protocol

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www.googletagmanager.com/ 0
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x-vercel-id: fra1::drghg-1768455824324-f2d8320b823a

GET
H2 200 favicon.ico
customer.io/ 15 KB
2 KB 30ms
29ms Other
image/vnd.microsoft.icon 76.76.21.21
AMAZON-02

General

Check archive.org

Download Go to

Full URL

https://customer.io/favicon.ico

Protocol

Security

TLS 1.3, , AES_128_GCM

Server

76.76.21.21 Walnut, United States, ASN16509 (AMAZON-02, US),

Reverse DNS

Software

Vercel /

Resource Hash

d7b0523176e6ce168890ae71884f5e29cb0d16670f54c0e69f0b6b1d74f42823

Security Headers

Name	Value
Strict-Transport-Security	max-age=63072000

Request headers

User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36
Referer: https://customer.io/

Response headers

content-encoding: br
etag: "0dbb8502fece42a03c8454c08bc1d41a"
age: 1994084
access-control-allow-methods: GET, POST, PUT, DELETE, OPTIONS
x-matched-path: /favicon.ico
date: Thu, 15 Jan 2026 05:43:44 GMT
content-disposition: inline; filename="favicon.ico"
content-type: image/vnd.microsoft.icon
last-modified: Tue, 23 Dec 2025 03:03:19 GMT
access-control-allow-headers: next-router-prefetch, Content-Type, Authorization
strict-transport-security: max-age=63072000
cache-control: public, max-age=31536000, immutable
x-vercel-cache: HIT
accept-ranges: bytes
access-control-allow-origin: *
content-length: 1329
server: Vercel
x-vercel-id: fra1::drghg-1768455824344-6d02db5d812a

GET
H2 200 /
customer.io/ 135 B
0 173ms
173ms Fetch
text/x-component 76.76.21.21
AMAZON-02

General

Check archive.org

Download Go to

Full URL

https://customer.io/?_rsc=gp69j

Requested by

Host: customer.io
URL: https://customer.io/_next/static/chunks/7706-5932120bc759eca6.js

Protocol

Security

TLS 1.3, , AES_128_GCM

Server

76.76.21.21 Walnut, United States, ASN16509 (AMAZON-02, US),

Reverse DNS

Software

Vercel /

Resource Hash

Security Headers

Name	Value
Strict-Transport-Security	max-age=63072000

Request headers

rsc: 1
Referer: https://customer.io/
next-url: /track
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36
next-router-prefetch: 1
next-router-state-tree: %5B%22%22%2C%7B%22children%22%3A%5B%22(marketing)%22%2C%7B%22children%22%3A%5B%5B%22slug%22%2C%22track%22%2C%22c%22%5D%2C%7B%22children%22%3A%5B%22__PAGE__%22%2C%7B%7D%2Cnull%2Cnull%5D%7D%2Cnull%2Cnull%5D%7D%2Cnull%2Cnull%5D%7D%2Cnull%2Cnull%2Ctrue%5D

Response headers

strict-transport-security: max-age=63072000
cache-control: private, no-cache, no-store, max-age=0, must-revalidate
content-encoding: br
x-vercel-cache: MISS
age: 0
access-control-allow-methods: GET, POST, PUT, DELETE, OPTIONS
x-matched-path: /index.rsc
access-control-allow-origin: *
date: Thu, 15 Jan 2026 05:43:44 GMT
content-type: text/x-component
vary: rsc, next-router-state-tree, next-router-prefetch, next-router-segment-prefetch
server: Vercel
x-vercel-id: fra1::iad1::dmjqw-1768455824375-a9bdbf7cbdd2
access-control-allow-headers: next-router-prefetch, Content-Type, Authorization

GET
H2 200 favicon.svg
customer.io/ 3 KB
68 B 47ms
47ms Other
image/svg+xml 76.76.21.21
AMAZON-02

General

Check archive.org

Download Go to

Full URL: https://customer.io/favicon.svg
Protocol: H2
Security: TLS 1.3, , AES_128_GCM
Server: 76.76.21.21 Walnut, United States, ASN16509 (AMAZON-02, US),
Reverse DNS
Software: Vercel /
Resource Hash: ea79a060997c70f98910411a3f0b4065670a1e8f6b27e063bcd5b1b0b2526b25

Request headers

User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/143.0.0.0 Safari/537.36
Referer: https://customer.io/

Response headers

content-encoding: br
etag: "2e99c4e76e898f801f6fefc38ca10938"
age: 336996
access-control-allow-methods: GET, POST, PUT, DELETE, OPTIONS
x-matched-path: /favicon.svg
date: Thu, 15 Jan 2026 05:43:44 GMT
last-modified: Sun, 11 Jan 2026 08:07:07 GMT
content-disposition: inline; filename="favicon.svg"
content-type: image/svg+xml
access-control-allow-headers: next-router-prefetch, Content-Type, Authorization
cache-control: public, max-age=0, must-revalidate
x-vercel-cache: HIT
accept-ranges: bytes
access-control-allow-origin: *
content-length: 584
server: Vercel
x-vercel-id: fra1::x75ts-1768455824408-e0eb2381432f

Failed requests

These URLs were requested, but there was no response received. You will also see them in the list above.

Domain: www.googletagmanager.com
URL: https://www.googletagmanager.com/gtm.js?id=GTM-NRGKPHX

Verdicts & Comments Add Verdict or Comment

15 JavaScript Window variables

These are the non-standard variables defined on the window object. These include var declarations and global functions and can be helpful in identifying possible client-side frameworks and code.

0 Cookies

Cookies are little pieces of information stored in the browser of a user. Whenever a user visits the site again, he will also send his cookie values, thus allowing the website to re-identify him even if he changed locations. This is how permanent logins work.

3 Console Messages

A page may trigger messages to the console to be logged. These are often error messages about being unable to load a resource or execute a piece of JavaScript. Sometimes they also provide insight into the technology behind a website.

Source	Level	URL Text
network	error	URL: https://customer.io/track?id=12345 Message: Failed to load resource: the server responded with a status of 404 ()
rendering	error	URL: https://customer.io/_next/static/chunks/f5e865f6-4ca82a29485a5989.js Message: Error: <svg> attribute height: Expected length, "auto".
rendering	error	URL: https://customer.io/_next/static/chunks/f5e865f6-4ca82a29485a5989.js Message: Error: <svg> attribute height: Expected length, "auto".

Security Headers

This page lists any security headers set by the main page. If you want to understand what these mean and how to use them, head on over to this page

Header	Value
Strict-Transport-Security	max-age=63072000

Indicators

This is a term in the security industry to describe indicators such as IPs, Domains, Hashes, etc. This does not imply that any of these indicate malicious activity.

customer.io
customeriomail.com
www.googletagmanager.com
www.googletagmanager.com
16.15.223.37
76.76.21.21
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0e6aa1be376363c8f9292069174d7c816e9927c700c93b0d9b936dc73a82f234
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51e28a2e9bb9f99fe65f8bd2f1bdd273b07a7e1ce44818e79829e924a58d86ab
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948ab6f2b2da553ba4bfe367e67a4e8dc390bf377158b4ad132859f6bfde1678
a0f11bf10277ff75f653bbe528392c697e3e77f55ebebcc1d8ca18ad65e32405
a2632cebb289c8115648f3a2312712e1e9611c3d8600424a1d149d9db4b60766
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accff11beabe24531303a5c472a16a8fabb3ff4a271b7ec29b83ad39b1eb3243
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c32179d949b3bbf67a3d6ab23b3f1afb8c4f7f9c09ba560802792148200279f6
c8be785c8605453bd009081b6ca2dfc784c53a79941e92256583925ee4d46d06
d7b0523176e6ce168890ae71884f5e29cb0d16670f54c0e69f0b6b1d74f42823
dc46bf18c9e1ee85658e393ae1fc310be67ed8aa8b382bc4406e839e57372256
e981abad25b2b0349d9fe7fb825dc08b933c4c11acd10ec8377ca3bb10d060df
ea59d7532e8ee86b61e107cc15142ef40c10bfa5426eadf9c71dda930bf9346f
ea79a060997c70f98910411a3f0b4065670a1e8f6b27e063bcd5b1b0b2526b25
eafb452b766a458c237317f2c84d7f17f222d081581b34296bcc21e6f2f43ad5
f0cf4ba025d86b85f94594d9ab54ca410cb22d4335a5f79548b1e84258dcfbba
f9599a447cdef35cc061533a81b3040dba3ca15ec0ab37e4e009b6e624abc579

customer.io Open in urlscan Pro 76.76.21.21 Public Scan

Summary

urlscan.io Verdict: No classification

Domain & IP information

Screenshot Live screenshot Full Image

Page Title

Page URL History Show full URLs

Page Statistics

39 Requests

97 %HTTPS

0 %IPv6

3 Domains

3 Subdomains

2 IPs

1 Countries

701 kBTransfer

2124 kBSize

0 Cookies

0 Outgoing links

Page URL History

Redirected requests

39 HTTP transactions Everything HTML Script Fetch XHR CSS Image Font Expand all 0 data transactions

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customer.io Open in urlscan Pro
76.76.21.21 Public Scan

Screenshot
Live screenshot

Full Image

39
Requests

97 %
HTTPS

0 %
IPv6

3
Domains

3
Subdomains

2
IPs

1
Countries

701 kB
Transfer

2124 kB
Size

0
Cookies

39 HTTP transactions
0 data transactions