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www.ervsoftware.co Open in urlscan Pro
216.24.57.4  Public Scan

Go To Rescan Add Verdict Report
Submitted URL: https://imagerender.cloud/
Effective URL: https://www.ervsoftware.co/
Submission: On March 18 via api from US — Scanned from US
 Behaviour Indicators
Similar DOM Content API
Verdicts

Summary

This website contacted 5 IPs in 1 countries across 6 domains to perform 12 HTTP transactions. The main IP is 216.24.57.4, located in United States and belongs to RENDER, US. The main domain is www.ervsoftware.co.
TLS certificate: Issued by E1 on March 17th 2024. Valid for: 3 months.
This is the only time www.ervsoftware.co was scanned on urlscan.io!

urlscan.io Verdict: No classification

Domain & IP information

IP Address AS Autonomous System
1 1 2606:4700:303... 13335 (CLOUDFLAR...)
1 1 216.24.57.1 397273 (RENDER)
7 216.24.57.4 397273 (RENDER)
2 37.19.207.34 60068 (CDN77 _)
1 2607:f8b0:400... 15169 (GOOGLE)
1 2607:f8b0:400... 15169 (GOOGLE)
12 5
1    2606:4700:3032::ac43:cb2e (United States)

ASN13335 (CLOUDFLARENET, US)
imagerender.cloud
1    216.24.57.1 (United States)

ASN397273 (RENDER, US)
ervsoftware.co
7    216.24.57.4 (United States)

ASN397273 (RENDER, US)
www.ervsoftware.co
2    37.19.207.34 (Ashburn, United States)

ASN60068 (CDN77 _, GB)
PTR: 37-19-207-34.bunnyinfra.net
cdn.usefathom.com
1    2607:f8b0:4004:c09::5f (Washington, United States)

ASN15169 (GOOGLE, US)
fonts.googleapis.com
1    2607:f8b0:4004:c1d::5e (Washington, United States)

ASN15169 (GOOGLE, US)
fonts.gstatic.com
Apex Domain
Subdomains		 Transfer
8 ervsoftware.co
ervsoftware.co
www.ervsoftware.co
421 KB
2 usefathom.com
cdn.usefathom.com — Cisco Umbrella Rank: 31124
3 KB
1 gstatic.com
fonts.gstatic.com
28 KB
1 googleapis.com
fonts.googleapis.com — Cisco Umbrella Rank: 110
831 B
1 imagerender.cloud
imagerender.cloud
435 B
0 sentry-cdn.com Failed
js.sentry-cdn.com Failed
12 6
Domain Requested by
7 www.ervsoftware.co www.ervsoftware.co
2 cdn.usefathom.com www.ervsoftware.co
1 fonts.gstatic.com fonts.googleapis.com
1 fonts.googleapis.com www.ervsoftware.co
1 ervsoftware.co 1 redirects
1 imagerender.cloud 1 redirects
0 js.sentry-cdn.com Failed www.ervsoftware.co
12 7

This site contains links to these domains. Also see Links.

Domain
docs.ervsoftware.co
manager.ervsoftware.co
en.wikipedia.org
github.com
Subject Issuer Validity Valid
www.ervsoftware.co
E1		 2024-03-17 -
2024-06-15		 3 months crt.sh
cdn.usefathom.com
R3		 2024-02-24 -
2024-05-24		 3 months crt.sh
upload.video.google.com
GTS CA 1C3		 2024-02-19 -
2024-05-13		 3 months crt.sh
*.gstatic.com
GTS CA 1C3		 2024-02-19 -
2024-05-13		 3 months crt.sh

This page contains 1 frames:

Primary Page: https://www.ervsoftware.co/
Frame ID: 17CC591995C4F72732D6951279FCBE55
Requests: 12 HTTP requests in this frame

Screenshot
Live screenshot
Full Image

Page Title

East River View Software Company

Page URL History Show full URLs

  1. https://imagerender.cloud/ HTTP 301
    https://ervsoftware.co/ HTTP 301
    https://www.ervsoftware.co/ Page URL

Page Statistics

12
Requests

92 %
HTTPS

50 %
IPv6

6
Domains

7
Subdomains

5
IPs

1
Countries

452 kB
Transfer

1197 kB
Size

0
Cookies

Page URL History

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

  1. https://imagerender.cloud/ HTTP 301
    https://ervsoftware.co/ HTTP 301
    https://www.ervsoftware.co/ Page URL

Redirected requests

There were HTTP redirect chains for the following requests:

12 HTTP transactions

Resource
Path		 Size
x-fer		 Type
MIME-Type
Primary Request /
www.ervsoftware.co/
Redirect Chain
  • https://imagerender.cloud/
  • https://ervsoftware.co/
  • https://www.ervsoftware.co/
9 KB
3 KB 		Document
General
Check archive.org
Download Go to
Full URL
https://www.ervsoftware.co/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
216.24.57.4 , United States, ASN397273 (RENDER, US),
Reverse DNS
Software
cloudflare /
Resource Hash
e09b9a46e2c703174a37331ec54fba4acdd95879cdd7e722f67ea5614b08ea40
Security Headers
Name Value
X-Content-Type-Options nosniff

Request headers

Upgrade-Insecure-Requests
1
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.128 Safari/537.36
accept-language
en-US,en;q=0.9

Response headers

alt-svc
h3=":443"; ma=86400
cache-control
public, max-age=0, s-maxage=300
cache-tag
srv-cfan1vcgqg4aqer0ke5g
cf-cache-status
DYNAMIC
cf-ray
86678a99ee944307-EWR
cloudflare-cdn-cache-control
public, max-age=300
content-encoding
br
content-type
text/html; charset=utf-8
date
Mon, 18 Mar 2024 19:13:41 GMT
etag
W/"1d4f62489d5319e23f96ffd4b2b6f269"
last-modified
Sun, 03 Mar 2024 20:40:05 UTC
server
cloudflare
vary
Accept-Encoding
x-content-type-options
nosniff

Redirect headers

alt-svc
h3=":443"; ma=86400
cf-cache-status
DYNAMIC
cf-ray
86678a969dd78ca7-EWR
content-length
62
content-type
text/html; charset=utf-8
date
Mon, 18 Mar 2024 19:13:41 GMT
location
https://www.ervsoftware.co/
server
cloudflare
vary
Accept-Encoding
site-3a8eb5c8.css
www.ervsoftware.co/ 		59 KB
11 KB 		Stylesheet
General
Check archive.org
Download Go to
Full URL
https://www.ervsoftware.co/site-3a8eb5c8.css
Requested by
Host: www.ervsoftware.co
URL: https://www.ervsoftware.co/
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
216.24.57.4 , United States, ASN397273 (RENDER, US),
Reverse DNS
Software
cloudflare /
Resource Hash
93e531d110156f892c7e1c06f7d430172711dfed5664be811a9b378febcaf1ff
Security Headers
Name Value
X-Content-Type-Options nosniff

Request headers

accept-language
en-US,en;q=0.9
Referer
https://www.ervsoftware.co/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.128 Safari/537.36

Response headers

date
Mon, 18 Mar 2024 19:13:41 GMT
content-encoding
br
x-content-type-options
nosniff
cf-cache-status
DYNAMIC
last-modified
Sun, 03 Mar 2024 20:40:04 UTC
server
cloudflare
etag
W/"ac91d0867ae10933efa26f1fffa29a3c"
vary
Accept-Encoding
content-type
text/css; charset=utf-8
cache-tag
srv-cfan1vcgqg4aqer0ke5g
cache-control
public, max-age=0, s-maxage=300
cf-ray
86678a9b99274307-EWR
cloudflare-cdn-cache-control
public, max-age=300
alt-svc
h3=":443"; ma=86400
script.js
cdn.usefathom.com/ 		6 KB
2 KB 		Script
General
Check archive.org
Download Go to
Full URL
https://cdn.usefathom.com/script.js
Requested by
Host: www.ervsoftware.co
URL: https://www.ervsoftware.co/
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
37.19.207.34 Ashburn, United States, ASN60068 (CDN77 _, GB),
Reverse DNS
37-19-207-34.bunnyinfra.net
Software
BunnyCDN-ASB1-925 /
Resource Hash
19ddbd3f35a8f49ec6c6b5074c782c5b9324b8fda7859ee5f632d10e95c02e81

Request headers

accept-language
en-US,en;q=0.9
Referer
https://www.ervsoftware.co/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.128 Safari/537.36

Response headers

date
Mon, 18 Mar 2024 19:13:41 GMT
content-encoding
br
cdn-edgestorageid
925
x-vapor-base64-encode
True
cdn-cachedat
03/07/2024 18:32:05
cdn-pullzone
506217
last-modified
Fri, 01 Mar 2024 17:37:08 GMT
server
BunnyCDN-ASB1-925
cdn-proxyver
1.04
cdn-requestpullcode
200
etag
W/"d41d8cd98f00b204e9800998ecf8427e"
vary
Accept-Encoding, Accept-Encoding
content-type
application/javascript
access-control-allow-origin
*
cdn-cache
HIT
cdn-uid
aa90c48b-f401-4fa1-aac1-c94c8f3ae560
cache-control
public, max-age=0
cdn-requestid
5c8e81abcbe9ed64648add74d0c22622
cdn-requestcountrycode
US
cdn-status
200
cdn-requestpullsuccess
True
d5063769d21e0e4c778d0ebd1eec969f.min.js
js.sentry-cdn.com/ 		0
0
css2
fonts.googleapis.com/ 		2 KB
831 B 		Stylesheet
General
Check archive.org
Download Go to
Full URL
https://fonts.googleapis.com/css2?family=Urbanist:wght@400;500;700&display=swap
Requested by
Host: www.ervsoftware.co
URL: https://www.ervsoftware.co/site-3a8eb5c8.css
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2607:f8b0:4004:c09::5f Washington, United States, ASN15169 (GOOGLE, US),
Reverse DNS
Software
ESF /
Resource Hash
c377f8c5134ab9383a665dce5526a03ef402c253d4fd37c7e57a36867b120253
Security Headers
Name Value
Strict-Transport-Security max-age=31536000
X-Content-Type-Options nosniff
X-Frame-Options SAMEORIGIN
X-Xss-Protection 0

Request headers

accept-language
en-US,en;q=0.9
Referer
https://www.ervsoftware.co/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.128 Safari/537.36

Response headers

strict-transport-security
max-age=31536000
date
Mon, 18 Mar 2024 19:13:42 GMT
content-encoding
gzip
x-content-type-options
nosniff
cross-origin-resource-policy
cross-origin
alt-svc
h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
x-xss-protection
0
last-modified
Mon, 18 Mar 2024 19:13:42 GMT
server
ESF
cross-origin-opener-policy
same-origin-allow-popups
x-frame-options
SAMEORIGIN
content-type
text/css; charset=utf-8
access-control-allow-origin
*
cache-control
private, max-age=86400, stale-while-revalidate=604800
timing-allow-origin
*
link
<https://fonts.gstatic.com>; rel=preconnect; crossorigin
expires
Mon, 18 Mar 2024 19:13:42 GMT
logo.png
www.ervsoftware.co/images/ 		60 KB
61 KB 		Image
General
Check archive.org
Download Go to Show image
Full URL
https://www.ervsoftware.co/images/logo.png
Requested by
Host: www.ervsoftware.co
URL: https://www.ervsoftware.co/
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
216.24.57.4 , United States, ASN397273 (RENDER, US),
Reverse DNS
Software
cloudflare /
Resource Hash
70dbf97ab564f6b896cac0682ccd7c499c23663d8d1ef6d72e621eae49208125
Security Headers
Name Value
X-Content-Type-Options nosniff

Request headers

accept-language
en-US,en;q=0.9
Referer
https://www.ervsoftware.co/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.128 Safari/537.36

Response headers

date
Mon, 18 Mar 2024 19:13:42 GMT
x-content-type-options
nosniff
cf-cache-status
DYNAMIC
last-modified
Sun, 03 Mar 2024 20:40:05 UTC
server
cloudflare
etag
"85c87f7b89846d1ad62d02e4b8b0090c"
vary
Accept-Encoding
content-type
image/png
cache-tag
srv-cfan1vcgqg4aqer0ke5g
cache-control
public, max-age=0, s-maxage=300
cf-ray
86678a9dfcc641fe-EWR
cloudflare-cdn-cache-control
public, max-age=300
content-length
61712
alt-svc
h3=":443"; ma=86400
meta-api-4d507820.svg
www.ervsoftware.co/images/ 		8 KB
3 KB 		Image
General
Check archive.org
Download Go to Show image
Full URL
https://www.ervsoftware.co/images/meta-api-4d507820.svg
Requested by
Host: www.ervsoftware.co
URL: https://www.ervsoftware.co/
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
216.24.57.4 , United States, ASN397273 (RENDER, US),
Reverse DNS
Software
cloudflare /
Resource Hash
1a3dde82949b9e5918d81221434c8aa2a0ec0a6f740ccb52853db29e46c1f000
Security Headers
Name Value
X-Content-Type-Options nosniff

Request headers

accept-language
en-US,en;q=0.9
Referer
https://www.ervsoftware.co/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.128 Safari/537.36

Response headers

date
Mon, 18 Mar 2024 19:13:42 GMT
content-encoding
br
x-content-type-options
nosniff
cf-cache-status
DYNAMIC
last-modified
Sun, 03 Mar 2024 20:40:05 UTC
server
cloudflare
etag
W/"bebf35f678a73aec5a6bb3baf80d924f"
vary
Accept-Encoding
content-type
image/svg+xml
cache-tag
srv-cfan1vcgqg4aqer0ke5g
cache-control
public, max-age=0, s-maxage=300
cf-ray
86678a9dfcc941fe-EWR
cloudflare-cdn-cache-control
public, max-age=300
alt-svc
h3=":443"; ma=86400
dns-api-0bade851.svg
www.ervsoftware.co/images/ 		20 KB
5 KB 		Image
General
Check archive.org
Download Go to Show image
Full URL
https://www.ervsoftware.co/images/dns-api-0bade851.svg
Requested by
Host: www.ervsoftware.co
URL: https://www.ervsoftware.co/
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
216.24.57.4 , United States, ASN397273 (RENDER, US),
Reverse DNS
Software
cloudflare /
Resource Hash
604d79265c82f58e29490b40b93128c18eddc7c1cb5ed7c37975aea3bad406fa
Security Headers
Name Value
X-Content-Type-Options nosniff

Request headers

accept-language
en-US,en;q=0.9
Referer
https://www.ervsoftware.co/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.128 Safari/537.36

Response headers

date
Mon, 18 Mar 2024 19:13:42 GMT
content-encoding
br
x-content-type-options
nosniff
cf-cache-status
DYNAMIC
last-modified
Sun, 03 Mar 2024 20:40:05 UTC
server
cloudflare
etag
W/"cbd8e3e998085a62125338dced74243d"
vary
Accept-Encoding
content-type
image/svg+xml
cache-tag
srv-cfan1vcgqg4aqer0ke5g
cache-control
public, max-age=0, s-maxage=300
cf-ray
86678a9dfcca41fe-EWR
cloudflare-cdn-cache-control
public, max-age=300
alt-svc
h3=":443"; ma=86400
logo-stamp.png
www.ervsoftware.co/images/ 		40 KB
41 KB 		Image
General
Check archive.org
Download Go to Show image
Full URL
https://www.ervsoftware.co/images/logo-stamp.png
Requested by
Host: www.ervsoftware.co
URL: https://www.ervsoftware.co/
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
216.24.57.4 , United States, ASN397273 (RENDER, US),
Reverse DNS
Software
cloudflare /
Resource Hash
29cb8ff043e71ece869a586a0daf4fae50c2de96ec2c01915c2a4bc445f60d53
Security Headers
Name Value
X-Content-Type-Options nosniff

Request headers

accept-language
en-US,en;q=0.9
Referer
https://www.ervsoftware.co/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.128 Safari/537.36

Response headers

date
Mon, 18 Mar 2024 19:13:42 GMT
x-content-type-options
nosniff
cf-cache-status
DYNAMIC
last-modified
Sun, 03 Mar 2024 20:40:05 UTC
server
cloudflare
etag
"9d7c702205bcff7d64c8aefaf2ccfba4"
vary
Accept-Encoding
content-type
image/png
cache-tag
srv-cfan1vcgqg4aqer0ke5g
cache-control
public, max-age=0, s-maxage=300
cf-ray
86678a9dfccc41fe-EWR
cloudflare-cdn-cache-control
public, max-age=300
content-length
41393
alt-svc
h3=":443"; ma=86400
site-c320e69b.js
www.ervsoftware.co/ 		965 KB
297 KB 		Script
General
Check archive.org
Download Go to
Full URL
https://www.ervsoftware.co/site-c320e69b.js
Requested by
Host: www.ervsoftware.co
URL: https://www.ervsoftware.co/
Protocol
H3
Security
QUIC, , AES_128_GCM
Server
216.24.57.4 , United States, ASN397273 (RENDER, US),
Reverse DNS
Software
cloudflare /
Resource Hash
6043d4c1ffa6de112c4d5a87b20645a3d26a59efc239d774d5fba3709ead1c59
Security Headers
Name Value
X-Content-Type-Options nosniff

Request headers

accept-language
en-US,en;q=0.9
Referer
https://www.ervsoftware.co/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.128 Safari/537.36

Response headers

date
Mon, 18 Mar 2024 19:13:42 GMT
content-encoding
br
x-content-type-options
nosniff
cf-cache-status
DYNAMIC
last-modified
Sun, 03 Mar 2024 20:40:05 UTC
server
cloudflare
etag
W/"61f9822669935a2d5e9135c825604c24"
vary
Accept-Encoding
content-type
application/javascript
cache-tag
srv-cfan1vcgqg4aqer0ke5g
cache-control
public, max-age=0, s-maxage=300
cf-ray
86678a9dfccd41fe-EWR
cloudflare-cdn-cache-control
public, max-age=300
alt-svc
h3=":443"; ma=86400
L0x-DF02iFML4hGCyMqlbS0.woff2
fonts.gstatic.com/s/urbanist/v15/ 		27 KB
28 KB 		Font
General
Check archive.org
Download Go to
Full URL
https://fonts.gstatic.com/s/urbanist/v15/L0x-DF02iFML4hGCyMqlbS0.woff2
Requested by
Host: fonts.googleapis.com
URL: https://fonts.googleapis.com/css2?family=Urbanist:wght@400;500;700&display=swap
Protocol
H2
Security
TLS 1.3, , AES_128_GCM
Server
2607:f8b0:4004:c1d::5e Washington, United States, ASN15169 (GOOGLE, US),
Reverse DNS
Software
sffe /
Resource Hash
84221e6c0c5f950b44d38a40bc19ffa9a340b2a5d207cb6f6461b84d474f2555
Security Headers
Name Value
X-Content-Type-Options nosniff
X-Xss-Protection 0

Request headers

Referer
https://fonts.googleapis.com/
Origin
https://www.ervsoftware.co
accept-language
en-US,en;q=0.9
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.128 Safari/537.36

Response headers

date
Wed, 13 Mar 2024 09:09:17 GMT
x-content-type-options
nosniff
age
468265
content-security-policy-report-only
require-trusted-types-for 'script'; report-uri https://csp.withgoogle.com/csp/apps-themes
cross-origin-resource-policy
cross-origin
alt-svc
h3=":443"; ma=2592000,h3-29=":443"; ma=2592000
content-length
27824
x-xss-protection
0
last-modified
Thu, 24 Aug 2023 20:09:06 GMT
server
sffe
cross-origin-opener-policy
same-origin; report-to="apps-themes"
report-to
{"group":"apps-themes","max_age":2592000,"endpoints":[{"url":"https://csp.withgoogle.com/csp/report-to/apps-themes"}]}
content-type
font/woff2
access-control-allow-origin
*
cache-control
public, max-age=31536000
accept-ranges
bytes
timing-allow-origin
*
expires
Thu, 13 Mar 2025 09:09:17 GMT
/
cdn.usefathom.com/ 		43 B
452 B 		Image
General
Check archive.org
Download Go to Show image
Full URL
https://cdn.usefathom.com/?h=https%3A%2F%2Fwww.ervsoftware.co&p=%2F&r=&sid=CFDPOACN&qs=%7B%7D&cid=45112882
Protocol
H2
Security
TLS 1.3, , AES_256_GCM
Server
37.19.207.34 Ashburn, United States, ASN60068 (CDN77 _, GB),
Reverse DNS
37-19-207-34.bunnyinfra.net
Software
BunnyCDN-ASB1-925 /
Resource Hash
aa03dc59bdca72631d2301e4297cfa030bd31b907dc138e7b973d12311c90a22

Request headers

accept-language
en-US,en;q=0.9
Referer
https://www.ervsoftware.co/
User-Agent
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.6261.128 Safari/537.36

Response headers

date
Mon, 18 Mar 2024 19:13:42 GMT
cdn-edgestorageid
925
x-vapor-base64-encode
True
cdn-cachedat
03/18/2024 19:13:42
cdn-pullzone
506217
content-length
43
pragma
no-cache
server
BunnyCDN-ASB1-925
cdn-proxyver
1.04
cdn-requestpullcode
200
tk
N
content-type
image/gif
access-control-allow-origin
*
cdn-cache
MISS
cdn-uid
aa90c48b-f401-4fa1-aac1-c94c8f3ae560
cache-control
public, max-age=0
cdn-requestid
efbaf97d6befd42de0b0a3e5c2d1ab00
cdn-requestcountrycode
US
cdn-status
200
cdn-requestpullsuccess
True

Failed requests

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

Domain
js.sentry-cdn.com
URL
https://js.sentry-cdn.com/d5063769d21e0e4c778d0ebd1eec969f.min.js

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2 JavaScript Global Variables

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

object| hljs object| fathom

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1 Console Messages

Source Level URL
Text
security error URL: https://www.ervsoftware.co/
Message:
Refused to load the script 'https://js.sentry-cdn.com/d5063769d21e0e4c778d0ebd1eec969f.min.js' because it violates the following Content Security Policy directive: "script-src 'self' cdn.usefathom.com". Note that 'script-src-elem' was not explicitly set, so 'script-src' is used as a fallback.

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
X-Content-Type-Options nosniff