TCP SYN (JA4T)

65535_2-4-8-1-3_1410_8

first seen 2026-07-21 00:16 · last seen 2026-10-28 14:20 · JSON

Last 7 days (7 observations)

Distinct clients per day (last 30 days, peak 4/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 window65535
Option kinds2-4-8-1-3
MSS1410
Window scale8

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_de4a06bb82e39
t13d4412h1_fd39b124ee10_58ed7828516f7
t13d131100_f57a46bbacb6_ab7e3b40a677 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.5, go-net/http 1.26.4.The fingerprint page shows the full measured match list. More on the catalog.5
t13d1515h1_8daaf6152771_0a20fe35d3a55
t13d4312h1_c7886603b240_b26ce05bbdd64
t13d1516h2_8daaf6152771_806a8c22fdea Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chrome 151.0.7922.137, chromium 151.0.7922.34, +28 more.The fingerprint page shows the full measured match list. More on the catalog.1
t13d1516h1_8daaf6152771_1a63afa7c4781

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.11
ge11nn13enus_9db22d02e17a_000000000000_00000000000010
ge11nn14enus_4a2973d235de_000000000000_0000000000005
ge20nn13enus_0c2c1d640f3e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 151.0.7922.137, chrome 151.0.7922.170, chrome 151.0.7922.108, +36 more.The fingerprint page shows the full measured match list. More on the catalog.1
ge11nr19zhcn_4e9b73ab7510_000000000000_0000000000001
ge11nr18dede_45ed06ef2081_000000000000_0000000000001
ge11nr19zhtw_4e9b73ab7510_000000000000_0000000000001
ge11nr17dede_021c223ca66c_000000000000_0000000000001
ge11nr16engb_4723467df157_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 151.0.7922.34, chrome 151.0.7922.137, +57 more.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (p0f)

fingerprintco-occurrences
4:52+12:0:1410:65535,8:mss,sok,ts,nop,ws:df,id+:05
4:44+20:0:1410:65535,8:mss,sok,ts,nop,ws:df,id+:04
4:41+23:0:1410:65535,8:mss,sok,ts,nop,ws:df,id+:03
4:49+15:0:1410:65535,8:mss,sok,ts,nop,ws:df,id+:03
4:42+22:0:1410:65535,8:mss,sok,ts,nop,ws:df,id+:02
4:40+24:0:1410:65535,8:mss,sok,ts,nop,ws:df,id+:02
4:45+19:0:1410:65535,8:mss,sok,ts,nop,ws:df,id+:02
4:39+25:0:1410:65535,8:mss,sok,ts,nop,ws:df,id+:02
4:54+10:0:1410:65535,8:mss,sok,ts,nop,ws:df,id+:02
4:55+9:0:1410:65535,8: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/124.0.0.0 Safari/537.364
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.2 Safari/605.1.151
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 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
KW · Kuwait7
ES · Spain4
JO · Jordan4
BD · Bangladesh3
PK · Pakistan3
ZA · South Africa2
US · United States1
BR · Brazil1
PY · Paraguay1
CN · China1

Network (ASN)

fingerprintco-occurrences
AS42961 · Mobile Telecommunications Company K.S.C.P.7
AS9038 · Al Bahrainia al Urdunia Liltaknia Wa Alitisalat Plc. Co4
AS12430 · VODAFONE ESPANA S.A.U.3
AS23470 · ReliableSite.Net LLC1
AS14593 · Space Exploration Technologies Corporation1
AS33771 · Safaricom Limited1
AS9541 · Cyber Internet Services (Pvt) Ltd.1
AS17557 · Pakistan Telecommunication Company Limited1
AS15802 · Emirates Integrated Telecommunications Company PJSC1
AS48728 · Vodafone Qatar P.Q.S.C1

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 157.0.1, firefox-esr 153.5.1esr, firefox 158.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.5
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.4
0a0a,001d,0017,00181