TCP SYN (JA4T)

65535_2-1-3-4-8_1440_12

first seen 2026-07-01 14:39 · last seen 2026-09-18 01:41 · JSON

Decomposed attributes

TCP window65535
Option kinds2-1-3-4-8
MSS1440
Window scale12

Co-observed signals

Signals from other families seen in the same observation. A fingerprint spread thinly across many lower-layer signatures is a classic inconsistency signal.

TLS ClientHello (JA4)

fingerprintco-occurrences
t13d3112h2_e8f1e7e78f70_b26ce05bbdd6 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.5.0, php-curl 7.88.1.The fingerprint page shows the full measured match list. More on the catalog.1
t13d171100_ab0a1bf427ad_8e6e362c5eac1
t13d1513h2_8daaf6152771_eca864cca44a1
t13d1313h2_f57a46bbacb6_7f0f34a4126d1

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn020000_5594a17e7e7e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0, curl 8.13.0, +11 more.The fingerprint page shows the full measured match list. More on the catalog.1
ge11nn050000_b223a0ebb0b5_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: python-requests 2.34.2, python-requests 2.33.1, python-requests 2.32.3.The fingerprint page shows the full measured match list. More on the catalog.1
ge20nn020000_b89ce445e0b3_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13, go-net/http 1.27.1, go-net/http 1.27.0, +14 more.The fingerprint page shows the full measured match list. More on the catalog.1
ge20nn08enus_6452f234bcf7_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
4:16777216|16711681|0|m,p,a,s1
3:100;4:10485760;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0.The fingerprint page shows the full measured match list. More on the catalog.1
2:0;4:2097152;3:100;9:1|10485760|0|m,s,p,a1

TCP SYN (p0f)

fingerprintco-occurrences
6:54+10:0:1440:65535,12:mss,nop,ws,sok,ts:ecn,flow:01
6:50+14:0:1440:65535,12:mss,nop,ws,sok,ts:ecn,flow:01
6:53+11:0:1440:65535,12:mss,nop,ws,sok,ts:ecn,flow:01
6:243+12:0:1440:65535,12:mss,nop,ws,sok,ts:ecn,flow:01

User-Agent

fingerprintco-occurrences
curl/8.5.01
SpaceCowboys Android RSS Reader / 2.21.1(4025)1
Mozilla/5.0 (compatible; RedditApp/1.0)1
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0 Safari/537.361

Country

fingerprintco-occurrences
US · United States4

Network (ASN)

fingerprintco-occurrences
AS7018 · AT&T Enterprises, LLC4