TCP SYN (JA4T)

64386_2-4-8-1-3_1314_10

first seen 2026-09-14 17:19 · last seen 2026-10-24 22:24 · JSON

Distinct clients per day (last 30 days, peak 2/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 window64386
Option kinds2-4-8-1-3
MSS1314
Window scale10

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
t13d4312h1_c7886603b240_b26ce05bbdd68
t13d1516h2_8daaf6152771_d8a2da3f94cd Match?Exact match in Thumbprint's published controlled catalog captures: chromium 149.0.7827.102, chrome 149.0.7827.102, chrome 149.0.7827.156, +25 more.The fingerprint page shows the full measured match list. More on the catalog.1

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.8
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, +39 more.The fingerprint page shows the full measured match list. More on the catalog.1

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, +60 more.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (p0f)

fingerprintco-occurrences
4:46+18:0:1314:mss*49,10:mss,sok,ts,nop,ws:df,id+:03
4:54+10:0:1314:mss*49,10:mss,sok,ts,nop,ws:df,id+:01
4:51+13:0:1314:mss*49,10:mss,sok,ts,nop,ws:df,id+:01
4:44+20:0:1314:mss*49,10:mss,sok,ts,nop,ws:df,id+:01
4:50+14:0:1314:mss*49,10:mss,sok,ts,nop,ws:df,id+:01
4:52+12:0:1314:mss*49,10:mss,sok,ts,nop,ws:df,id+:01
4:53+11:0:1314:mss*49,10: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/136.0.0.0 Safari/537.364
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 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/537.362
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

Country

fingerprintco-occurrences
TH · Thailand2
US · United States1
KR · South Korea1
CA · Canada1
HK · Hong Kong SAR China1
MY · Malaysia1
JM · Jamaica1
PR · Puerto Rico1

Network (ASN)

fingerprintco-occurrences
AS7029 · Windstream Communications LLC1
AS9318 · SK Broadband Co Ltd1
AS4788 · TM TECHNOLOGY SERVICES SDN. BHD.1
AS6327 · Shaw Communications1
AS33576 · Digicel Jamaica1
AS10396 · DATACOM CARIBE, INC.1
AS9304 · HGC Global Communications Limited1
AS131293 · TOT Public Company Limited1
AS4618 · Internet Thailand Company Limited1

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.4