tblk.us - urlscan.io

Summary

This website contacted 1 IPs in 1 countries across 1 domains to perform 7 HTTP transactions. The main IP is 2606:4700:20::681a:2a4, located in United States and belongs to CLOUDFLARENET, US. The main domain is tblk.us.
TLS certificate: Issued by E1 on April 28th 2024. Valid for: 3 months.

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

urlscan.io Verdict: No classification

Domain & IP information

	IP Address	AS Autonomous System
1 1	2606:4700::68... 2606:4700::6813:a718	13335 (CLOUDFLAR...) (CLOUDFLARENET)
1 8	2606:4700:20:... 2606:4700:20::681a:2a4	13335 (CLOUDFLAR...) (CLOUDFLARENET)
7	1

1 2606:4700::6813:a718 (United States) 1 redirects

ASN13335 (CLOUDFLARENET, US)

dev-auth.tblk.us	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

8 2606:4700:20::681a:2a4 (United States) 1 redirects

ASN13335 (CLOUDFLARENET, US)

tblk.us	Domain lookup VirusTotal SecurityTrails crt.sh Censys Domaintools

	Apex Domain Subdomains	Transfer
9	tblk.us 2 redirects dev-auth.tblk.us tblk.us	21 KB
7	1

	Domain	Requested by
8	tblk.us	1 redirects tblk.us
1	dev-auth.tblk.us	1 redirects
7	2

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

Domain
www.cloudflare.com

Subject Issuer	Validity	Valid
tblk.us E1	`2024-04-28` - `2024-07-27`	3 months	crt.sh

This page contains 2 frames:

Primary Page: https://tblk.us/
Frame ID: 657094C0BFC164A1C5D35C7C4AE70ADF
Requests: 5 HTTP requests in this frame

Frame: https://tblk.us/cdn-cgi/challenge-platform/h/g/scripts/jsd/d0ff3ebede6b/main.js
Frame ID: BAE06D4A6F5994D8AC2057956F53A471
Requests: 2 HTTP requests in this frame

Screenshot
Live screenshot

Full Image

Page Title

Attention Required! | Cloudflare

Page URL History Show full URLs

http://dev-auth.tblk.us/ HTTP 307
https://dev-auth.tblk.us/ HTTP 302
https://tblk.us/ Page URL

Page Statistics

7
Requests

86 %
HTTPS

100 %
IPv6

1
Domains

2
Subdomains

1
IPs

1
Countries

20 kB
Transfer

45 kB
Size

1
Cookies

1 Outgoing links

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

URL: https://www.cloudflare.com/5xx-error-landing
Title: Cloudflare

Search URL Search Domain Scan URL

Page URL History

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

http://dev-auth.tblk.us/ HTTP 307
https://dev-auth.tblk.us/ HTTP 302
https://tblk.us/ Page URL

Redirected requests

There were HTTP redirect chains for the following requests:

Request Chain 3

https://tblk.us/cdn-cgi/challenge-platform/scripts/jsd/main.js HTTP 302
https://tblk.us/cdn-cgi/challenge-platform/h/g/scripts/jsd/d0ff3ebede6b/main.js

7 HTTP transactions
0 data transactions

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

GET
H/1.1

403
Forbidden

Primary Request / Show response
tblk.us/
Redirect Chain

http://dev-auth.tblk.us/
https://dev-auth.tblk.us/
https://tblk.us/

6 KB
3 KB

126ms
41ms

Document
text/html

2606:4700:20::681a:2a4
CLOUDFLARENET

General

Check archive.org

Show headers Download Go to

Full URL

https://tblk.us/

Protocol

HTTP/1.1

Security

TLS 1.3, , AES_128_GCM

Server

2606:4700:20::681a:2a4 , United States, ASN13335 (CLOUDFLARENET, US),

Reverse DNS

Software

cloudflare /

Resource Hash

e9dcff7913befc559dac90f39f411956f61f8737a4f930d54cdb1e2e8832d35c

Security Headers

Name	Value
Strict-Transport-Security	max-age=15552000; includeSubDomains; preload
X-Content-Type-Options	nosniff
X-Frame-Options	SAMEORIGIN

Request headers

Accept-Language: en-US,en;q=0.9;q=0.9
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36

Response headers

CF-RAY: 87ee93fd9fbbdaf5-MIA
Cache-Control: max-age=15
Connection: keep-alive
Content-Encoding: gzip
Content-Type: text/html; charset=UTF-8
Date: Sun, 05 May 2024 06:12:18 GMT
Expires: Sun, 05 May 2024 06:12:33 GMT
NEL: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
Referrer-Policy: same-origin
Report-To: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=Gn4LTvMNZAKYWGxa7PEBhBcvL4RgAy364KvfTVJANyPA5a7dn%2BBUMAbg1wjnB2QYcTUR9%2FgZ99XhTz7WdN1fXUy2sBVZMbD%2FjEMY2lByXbutvXhcwjza1KF1LRUANebGZVHsEjw%3D"}],"group":"cf-nel","max_age":604800}
Server: cloudflare
Strict-Transport-Security: max-age=15552000; includeSubDomains; preload
Transfer-Encoding: chunked
Vary: Accept-Encoding
X-Content-Type-Options: nosniff
X-Frame-Options: SAMEORIGIN

Redirect headers

alt-svc: h3=":443"; ma=86400
cache-control: public, max-age=60
cf-cache-status: DYNAMIC
cf-ray: 87ee93fc28e13370-MIA
content-type: text/html; charset=utf-8
date: Sun, 05 May 2024 06:12:18 GMT
location: https://tblk.us/
server: cloudflare
strict-transport-security: max-age=31536000; includeSubDomains
vary: Accept, Accept-Encoding
x-auth0-requestid: e651f7a0866364b9d71a
x-content-type-options: nosniff

GET
H/1.1 200
OK cf.errors.css
tblk.us/cdn-cgi/styles/ 23 KB
5 KB 32ms
32ms Stylesheet
text/css 2606:4700:20::681a:2a4
CLOUDFLARENET

General

Check archive.org

Show headers Download Go to

Full URL

https://tblk.us/cdn-cgi/styles/cf.errors.css

Requested by

Host: tblk.us
URL: https://tblk.us/

Protocol

HTTP/1.1

Security

TLS 1.3, , AES_128_GCM

Server

2606:4700:20::681a:2a4 , United States, ASN13335 (CLOUDFLARENET, US),

Reverse DNS

Software

cloudflare /

Resource Hash

84e3c77025ace5af143972b4a40fc834dcdfd4e449d4b36a57e62326f16b3091

Security Headers

Name	Value
X-Content-Type-Options	nosniff
X-Frame-Options	DENY

Request headers

sec-ch-ua: "Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Referer: https://tblk.us/
Accept-Language: en-US,en;q=0.9;q=0.9
sec-ch-ua-mobile: ?0
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua-platform: "Win32"

Response headers

Date: Sun, 05 May 2024 06:12:18 GMT
Content-Encoding: gzip
X-Content-Type-Options: nosniff
Last-Modified: Tue, 30 Apr 2024 15:20:25 GMT
Server: cloudflare
ETag: W/"66310c39-5df3"
Transfer-Encoding: chunked
X-Frame-Options: DENY
Content-Type: text/css
Vary: Accept-Encoding
Cache-Control: max-age=7200, public
Connection: keep-alive
CF-RAY: 87ee93fddffedaf5-MIA
Expires: Sun, 05 May 2024 08:12:18 GMT

GET
H/1.1 200
OK browser-bar.png
tblk.us/cdn-cgi/images/ 715 B
1 KB 32ms
32ms Image
image/png 2606:4700:20::681a:2a4
CLOUDFLARENET

General

Check archive.org

Show headers Download Go to Show image

Full URL

https://tblk.us/cdn-cgi/images/browser-bar.png?1376755637

Requested by

Host: tblk.us
URL: https://tblk.us/cdn-cgi/styles/cf.errors.css

Protocol

HTTP/1.1

Security

TLS 1.3, , AES_128_GCM

Server

2606:4700:20::681a:2a4 , United States, ASN13335 (CLOUDFLARENET, US),

Reverse DNS

Software

cloudflare /

Resource Hash

8c873472f4925d5d47521db4d52532d2983e9cb1bde8b43143a6cc6db56c35db

Security Headers

Name	Value
X-Content-Type-Options	nosniff
X-Frame-Options	DENY

Request headers

sec-ch-ua: "Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Referer: https://tblk.us/cdn-cgi/styles/cf.errors.css
Accept-Language: en-US,en;q=0.9;q=0.9
sec-ch-ua-mobile: ?0
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua-platform: "Win32"

Response headers

Date: Sun, 05 May 2024 06:12:18 GMT
X-Content-Type-Options: nosniff
Last-Modified: Tue, 30 Apr 2024 15:20:25 GMT
Server: cloudflare
ETag: "66310c39-2cb"
X-Frame-Options: DENY
Vary: Accept-Encoding
Content-Type: image/png
Cache-Control: max-age=7200, public
Connection: keep-alive
Accept-Ranges: bytes
CF-RAY: 87ee93fe2829daf5-MIA
Content-Length: 715
Expires: Sun, 05 May 2024 08:12:18 GMT

GET
H/1.1 200
OK cf-no-screenshot-error.png
tblk.us/cdn-cgi/images/ 3 KB
4 KB 65ms
32ms Image
image/png 2606:4700:20::681a:2a4
CLOUDFLARENET

General

Check archive.org

Show headers Download Go to Show image

Full URL

https://tblk.us/cdn-cgi/images/cf-no-screenshot-error.png

Requested by

Host: tblk.us
URL: https://tblk.us/cdn-cgi/styles/cf.errors.css

Protocol

HTTP/1.1

Security

TLS 1.3, , AES_128_GCM

Server

2606:4700:20::681a:2a4 , United States, ASN13335 (CLOUDFLARENET, US),

Reverse DNS

Software

cloudflare /

Resource Hash

1c53772285052e52bb7c12ad46a85a55747ed7bf66963fe1993fcef91ff5b0d0

Security Headers

Name	Value
X-Content-Type-Options	nosniff
X-Frame-Options	DENY

Request headers

sec-ch-ua: "Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Referer: https://tblk.us/cdn-cgi/styles/cf.errors.css
Accept-Language: en-US,en;q=0.9;q=0.9
sec-ch-ua-mobile: ?0
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua-platform: "Win32"

Response headers

Date: Sun, 05 May 2024 06:12:18 GMT
X-Content-Type-Options: nosniff
Last-Modified: Tue, 30 Apr 2024 15:20:25 GMT
Server: cloudflare
ETag: "66310c39-c8d"
X-Frame-Options: DENY
Vary: Accept-Encoding
Content-Type: image/png
Cache-Control: max-age=7200, public
Connection: keep-alive
Accept-Ranges: bytes
CF-RAY: 87ee93fe5850daf5-MIA
Content-Length: 3213
Expires: Sun, 05 May 2024 08:12:18 GMT

GET
H/1.1

200
OK

main.js Show response
tblk.us/cdn-cgi/challenge-platform/h/g/scripts/jsd/d0ff3ebede6b/ Frame BAE0
Redirect Chain

https://tblk.us/cdn-cgi/challenge-platform/scripts/jsd/main.js
https://tblk.us/cdn-cgi/challenge-platform/h/g/scripts/jsd/d0ff3ebede6b/main.js

8 KB
4 KB

39ms
39ms

Script
application/javascript

2606:4700:20::681a:2a4
CLOUDFLARENET

General

Check archive.org

Show headers Download Go to

Full URL

https://tblk.us/cdn-cgi/challenge-platform/h/g/scripts/jsd/d0ff3ebede6b/main.js

Protocol

HTTP/1.1

Server

2606:4700:20::681a:2a4 , United States, ASN13335 (CLOUDFLARENET, US),

Reverse DNS

Software

cloudflare /

Resource Hash

9ecda788cce17624d8bf1586a2668c0f739d663ad3db73a05b7f4b51a01f315f

Security Headers

Name	Value
Strict-Transport-Security	max-age=15552000; includeSubDomains; preload
X-Content-Type-Options	nosniff

Request headers

Accept-Language: en-US,en;q=0.9;q=0.9
Referer
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36

Response headers

Date: Sun, 05 May 2024 06:12:18 GMT
content-encoding: br
x-content-type-options: nosniff
Strict-Transport-Security: max-age=15552000; includeSubDomains; preload
NEL: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
Server: cloudflare
Transfer-Encoding: chunked
vary: accept-encoding
Content-Type: application/javascript; charset=UTF-8
Report-To: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=kk5LgsgQ%2B54GGoW7enYETkHj%2FslSwwRK39E%2FhcFMqNKpCT498X5oiWaTuvaDHqRTW4t53rJKsO2NqicuPQQrU0V2vttE8h2C%2F5jvR00PzHAmAT2KeVIM1NV%2BrGBVmA0nyGl%2BpZs%3D"}],"group":"cf-nel","max_age":604800}
cache-control: max-age=14400, public
Connection: keep-alive
CF-RAY: 87ee93fede97a564-MIA

Redirect headers

Date: Sun, 05 May 2024 06:12:18 GMT
Strict-Transport-Security: max-age=15552000; includeSubDomains; preload
X-Content-Type-Options: nosniff
NEL: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
Server: cloudflare
Vary: Accept-Encoding
Report-To: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=mLEtk3zfqWycVMbToG1eMhKbE96F%2BNv7%2BqplDa%2BOKAiZpqtNc0I89AW6xaZz%2FifXeHft4JtP8Hr0fJ7H%2FczSk%2BpqtuPjh7sIYm8%2BFbFZooy%2FDGgKLtNxP6sSlVLoijC6nExo4jg%3D"}],"group":"cf-nel","max_age":604800}
access-control-allow-origin: *
location: /cdn-cgi/challenge-platform/h/g/scripts/jsd/d0ff3ebede6b/main.js
cache-control: max-age=300, public
Connection: keep-alive
CF-RAY: 87ee93fe9e69a564-MIA
Content-Length: 0

GET
H/1.1 403
Forbidden favicon.ico
tblk.us/ 4 KB
3 KB 36ms
36ms Other
text/html 2606:4700:20::681a:2a4
CLOUDFLARENET

General

Check archive.org

Show headers Download Go to

Full URL

https://tblk.us/favicon.ico

Protocol

HTTP/1.1

Security

TLS 1.3, , AES_128_GCM

Server

2606:4700:20::681a:2a4 , United States, ASN13335 (CLOUDFLARENET, US),

Reverse DNS

Software

cloudflare /

Resource Hash

dbab116749e1760cdc0722f45e469190a06408b26352cf25e448b0b3281ca7fe

Security Headers

Name	Value
Strict-Transport-Security	max-age=15552000; includeSubDomains; preload
X-Content-Type-Options	nosniff
X-Frame-Options	SAMEORIGIN

Request headers

sec-ch-ua: "Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
Referer: https://tblk.us/
Accept-Language: en-US,en;q=0.9;q=0.9
sec-ch-ua-mobile: ?0
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
sec-ch-ua-platform: "Win32"

Response headers

Date: Sun, 05 May 2024 06:12:18 GMT
Strict-Transport-Security: max-age=15552000; includeSubDomains; preload
X-Content-Type-Options: nosniff
NEL: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
Content-Encoding: gzip
Transfer-Encoding: chunked
Connection: keep-alive
Referrer-Policy: same-origin
Server: cloudflare
X-Frame-Options: SAMEORIGIN
Vary: Accept-Encoding
Content-Type: text/html; charset=UTF-8
Report-To: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=4JalhM58LgBG60kLXt5QXQaChZnpF0Oj2U%2BSxx0feRgCQ%2BrSboMWhj%2FiY637V%2BWIq9p4KgG1EE4qSJfRy2L72b5%2BdojIKZ1ECAi2aAjf%2FoZi%2F7oX8Cuh6hrolYqCMc8DSml5NAM%3D"}],"group":"cf-nel","max_age":604800}
Cache-Control: max-age=15
CF-RAY: 87ee93fe987cdaf5-MIA
Expires: Sun, 05 May 2024 06:12:33 GMT

POST
H/1.1 200
OK 87ee93fd9fbbdaf5 Show response
tblk.us/cdn-cgi/challenge-platform/h/g/jsd/r/ Frame BAE0 0
908 B 77ms
77ms XHR
text/plain 2606:4700:20::681a:2a4
CLOUDFLARENET

General

Check archive.org

Show headers Download Go to

Full URL

https://tblk.us/cdn-cgi/challenge-platform/h/g/jsd/r/87ee93fd9fbbdaf5

Requested by

Host: tblk.us
URL: https://tblk.us/cdn-cgi/challenge-platform/scripts/jsd/main.js

Protocol

HTTP/1.1

Security

TLS 1.3, , AES_128_GCM

Server

2606:4700:20::681a:2a4 , United States, ASN13335 (CLOUDFLARENET, US),

Reverse DNS

Software

cloudflare /

Resource Hash

e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

Security Headers

Name	Value
Strict-Transport-Security	max-age=15552000; includeSubDomains; preload
X-Content-Type-Options	nosniff

Request headers

sec-ch-ua: "Google Chrome";v="124", "Not:A-Brand";v="8", "Chromium";v="124"
sec-ch-ua-platform: "Win32"
Referer
Accept-Language: en-US,en;q=0.9;q=0.9
sec-ch-ua-mobile: ?0
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36
Content-Type: application/json

Response headers

Date: Sun, 05 May 2024 06:12:18 GMT
Strict-Transport-Security: max-age=15552000; includeSubDomains; preload
X-Content-Type-Options: nosniff
NEL: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
Server: cloudflare
Report-To: {"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=17EOSYqJy0%2FWncjpmHUXAxQAjBGeIdz3195CMNWxP%2FJC0Nz%2BP3pwcfeJttVnMRB8%2BslUf1Hij%2BlmrxOj3pael0%2FW%2BSD%2FLIKPDlTXcfKalim%2BdTIpkx6sEfLCfzma95Nvf1AHrSE%3D"}],"group":"cf-nel","max_age":604800}
Content-Type: text/plain; charset=UTF-8
Connection: keep-alive
CF-RAY: 87ee93ff9f39a564-MIA
Content-Length: 0

Verdicts & Comments Add Verdict or Comment

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| 0 object| _cf_translation

1 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.

			Domain/Path	Expires	Name / Value
			.tblk.us/	1970-01-21 05:07:05	Name: cf_clearance Value: vGIcmt8EdvlBSTKlSRtDEvJvQzhi6zKcokyDapQsAjI-1714889538-1.0.1.1-VT.u8u68McFPx7X.xpg._QnhTVEWg3YAhc1Gz97U2RQnXXpIFRyZ4te0ZPiqORpe.tFotQzguYpvHTHDr7nYqw

2 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://tblk.us/ Message: Failed to load resource: the server responded with a status of 403 (Forbidden)
network	error	URL: https://tblk.us/favicon.ico Message: Failed to load resource: the server responded with a status of 403 (Forbidden)

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=15552000; includeSubDomains; preload
X-Content-Type-Options	nosniff
X-Frame-Options	SAMEORIGIN

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.

dev-auth.tblk.us
tblk.us
2606:4700:20::681a:2a4
2606:4700::6813:a718
1c53772285052e52bb7c12ad46a85a55747ed7bf66963fe1993fcef91ff5b0d0
84e3c77025ace5af143972b4a40fc834dcdfd4e449d4b36a57e62326f16b3091
8c873472f4925d5d47521db4d52532d2983e9cb1bde8b43143a6cc6db56c35db
9ecda788cce17624d8bf1586a2668c0f739d663ad3db73a05b7f4b51a01f315f
dbab116749e1760cdc0722f45e469190a06408b26352cf25e448b0b3281ca7fe
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
e9dcff7913befc559dac90f39f411956f61f8737a4f930d54cdb1e2e8832d35c

tblk.us Open in urlscan Pro 2606:4700:20::681a:2a4 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

7 Requests

86 %HTTPS

100 %IPv6

1 Domains

2 Subdomains

1 IPs

1 Countries

20 kBTransfer

45 kBSize

1 Cookies

1 Outgoing links

Page URL History

Redirected requests

7 HTTP transactions Everything HTML Script AJAX CSS Image Expand all 0 data transactions

Request headers

Response headers

Redirect headers

Request headers

Response headers

Request headers

Response headers

Request headers

Response headers

Request headers

Response headers

Redirect headers

Request headers

Response headers

Request headers

Response headers

Verdicts & Comments Add Verdict or Comment

2 JavaScript Global Variables

1 Cookies

2 Console Messages

Security Headers

Indicators

tblk.us Open in urlscan Pro
2606:4700:20::681a:2a4 Public Scan

Screenshot
Live screenshot

Full Image

7
Requests

86 %
HTTPS

100 %
IPv6

1
Domains

2
Subdomains

1
IPs

1
Countries

20 kB
Transfer

45 kB
Size

1
Cookies

7 HTTP transactions
0 data transactions