TCP SYN (JA4T)

65535_2-4-8-1-3_1386_6

first seen 2026-07-16 18:02 · last seen 2026-10-27 18:04 · 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 window65535
Option kinds2-4-8-1-3
MSS1386
Window scale6

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
t13d4412h1_fd39b124ee10_58ed7828516f12
t13d4312h1_c7886603b240_b26ce05bbdd66
t13d1515h1_8daaf6152771_de4a06bb82e34
t13d1515h1_8daaf6152771_0a20fe35d3a53

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.18
ge11nn13enus_9db22d02e17a_000000000000_0000000000006
ge11nn14enus_4a2973d235de_000000000000_0000000000001

TCP SYN (p0f)

fingerprintco-occurrences
4:48+16:0:1386:65535,6:mss,sok,ts,nop,ws:df,id+:09
4:49+15:0:1386:65535,6:mss,sok,ts,nop,ws:df,id+:04
4:42+22:0:1386:65535,6:mss,sok,ts,nop,ws:df,id+:03
4:43+21:0:1386:65535,6:mss,sok,ts,nop,ws:df,id+:03
4:47+17:0:1386:65535,6:mss,sok,ts,nop,ws:df,id+:02
4:51+13:0:1386:65535,6:mss,sok,ts,nop,ws:df,id+:02
4:44+20:0:1386:65535,6:mss,sok,ts,nop,ws:df,id+:01
4:45+19:0:1386:65535,6: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/120.0.0.0 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.67 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 (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/100.0.4896.75 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4889.0 Safari/537.361
Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.66 Safari/537.361

Country

fingerprintco-occurrences
IQ · Iraq20
PK · Pakistan2
US · United States1
IL · Israel1
BO · Bolivia1

Network (ASN)

fingerprintco-occurrences
AS209193 · SUPER CELL NETWORK FOR INTERNET SERVICES LTD20
AS132165 · Connect Communications2
AS10796 · Charter Communications Inc1
AS8551 · Bezeq International Ltd.1
AS28024 · Nuevatel PCS de Bolivia S.A.1

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