TCP SYN (JA4T)

65535_2-4-8-1-3_1280_6

first seen 2026-07-23 12:50 · last seen 2026-09-11 06:54 · JSON

Last 7 days (2 observations)

Distinct clients per day (last 30 days, peak 8/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
MSS1280
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_58ed7828516f24
t13d1515h1_8daaf6152771_0a20fe35d3a523
t13d1515h1_8daaf6152771_de4a06bb82e320
t13d1516h1_8daaf6152771_1a63afa7c4782
t13d1712h1_5b57614c22b0_3d739a8c35e11

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn13enus_9db22d02e17a_000000000000_00000000000028
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.24
ge11nn14enus_4a2973d235de_000000000000_00000000000017
ge11nn030000_fe444ad14866_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.16.0.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (p0f)

fingerprintco-occurrences
4:49+15:0:1280:65535,6:mss,sok,ts,nop,ws:df,id+:020
4:46+18:0:1280:65535,6:mss,sok,ts,nop,ws:df,id+:012
4:51+13:0:1280:65535,6:mss,sok,ts,nop,ws:df,id+:011
4:48+16:0:1280:65535,6:mss,sok,ts,nop,ws:df,id+:09
4:47+17:0:1280:65535,6:mss,sok,ts,nop,ws:df,id+:04
4:50+14:0:1280:65535,6:mss,sok,ts,nop,ws:df,id+:03
4:44+20:0:1280:65535,6:mss,sok,ts,nop,ws:df,id+:03
4:42+22:0:1280:65535,6:mss,sok,ts,nop,ws:df,id+:03
4:45+19:0:1280:65535,6:mss,sok,ts,nop,ws:df,id+:03
4:49+15:0:1280:65535,6:mss,sok,ts,nop,ws:id-:02

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.366
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.365
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 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.364
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.364
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.364
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 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.363
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.67 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

Country

fingerprintco-occurrences
AO · Angola42
ZA · South Africa20
IN · India2
UA · Ukraine2
CN · China1
IQ · Iraq1
MK · Macedonia1
GY · Guyana1

Network (ASN)

fingerprintco-occurrences
AS37119 · UNITEL SA42
AS37457 · Telkom SA Ltd.14
AS20011 · Dimension Data4
AS5713 · Telkom SA Ltd.2
AS55836 · Reliance Jio Infocomm Limited2
AS4812 · China Telecom (Group)1
AS206206 · Kurdistan Net Company for Computer and Internet Ltd.1
AS19863 · Guyana Telephone & Telegraph Co.1
AS43139 · Maximum-Net LLC1
AS35004 · Branch Enterprise Netgroup-Service1