TCP SYN (JA4T)

64240_2-4-8-1-3_1372_7

first seen 2026-07-24 05:51 · last seen 2026-10-30 19:06 · JSON

Last 7 days (1 observations)

Distinct clients per day (last 30 days, peak 1/day)

Distinct clients are counted by IP-hash per complete UTC day — unlike observation counts this is insensitive to one chatty client, but NAT merges clients and address rotation splits them.

Decomposed attributes

TCP window64240
Option kinds2-4-8-1-3
MSS1372
Window scale7

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
t13d1515h1_8daaf6152771_de4a06bb82e33
t13d4312h1_c7886603b240_b26ce05bbdd62
t13d1515h1_8daaf6152771_0a20fe35d3a52
t13d4412h1_fd39b124ee10_58ed7828516f2
t13d1516h2_8daaf6152771_e5627efa2ab11
t13d1410h2_8d02cddff4d4_5603904660151

HTTP request (JA4H)

fingerprintco-occurrences
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.4
ge11nn13enus_9db22d02e17a_000000000000_0000000000004
ge20nn12enus_60f823d07c94_000000000000_0000000000001
ge11nn14enus_4a2973d235de_000000000000_0000000000001
ge20nn04enus_989c7cc05c9b_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;3:1000;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p1
1:65536;2:0;4:6291456;6:262144;4:1048576|15663105|1:0:0:256|m,a,s,p1

TCP SYN (p0f)

fingerprintco-occurrences
4:52+12:0:1372:mss*44,7:mss,sok,ts,nop,ws:df,id+:02
4:47+17:0:1372:mss*44,7:mss,sok,ts,nop,ws:df,id+:02
4:49+15:0:1372:mss*44,7:mss,sok,ts,nop,ws:df,id+:02
4:50+14:0:1372:mss*44,7:mss,sok,ts,nop,ws:df,id+:02
4:43+21:0:1372:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:44+20:0:1372:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:46+18:0:1372:mss*44,7:mss,sok,ts,nop,ws:df,id+:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36 Edg/135.0.0.01
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 11_2_3) AppleWebKit/537.36 (KHTML, like Gecko) Brave Chrome/89.0.4389.72 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.8 Safari/537.361

Country

fingerprintco-occurrences
DE · Germany2
US · United States2
AR · Argentina2
SK · Slovakia2
CI · Côte d’Ivoire2
BR · Brazil1

Network (ASN)

fingerprintco-occurrences
AS22773 · Cox Communications Inc.2
AS29571 · Orange Côte d'Ivoire2
AS52354 · Atlantica Video Cable S.A.2
AS15962 · Orange Slovensko a.s.2
AS62336 · PURtel.com GmbH1
AS269417 · PONTOCOM SOLUÇÕES EM TECNOLOGIA LTDA1
AS8767 · M-net Telekommunikations GmbH1

TLS supported groups

fingerprintco-occurrences
001d,0017,001e,0019,0018,0100,0101,0102,0103,0104 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, php-guzzle 8.3.1, curl 7.88.1, +10 more.The fingerprint page shows the full measured match list. More on the catalog.2