TCP SYN (JA4T)

8192_2-1-3-1-1-4_1452_8

first seen 2026-08-28 18:51 · last seen 2026-10-15 20:59 · JSON

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 window8192
Option kinds2-1-3-1-1-4
MSS1452
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
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.4
t13d4312h1_c7886603b240_b26ce05bbdd62
t13d2913h1_723694b0fccc_5671b5df50292
t13d1812h1_85036bcba153_b26ce05bbdd61

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.3
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
ge20nr16eses_94fdc06e0694_000000000000_0000000000001
ge20nr16engb_94fdc06e0694_000000000000_0000000000001
ge11nr11itit_835281d8e5d9_000000000000_0000000000001
ge20nr16itit_94fdc06e0694_000000000000_0000000000001
ge11nr11enca_835281d8e5d9_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, +60 more.The fingerprint page shows the full measured match list. More on the catalog.4

TCP SYN (p0f)

fingerprintco-occurrences
4:111+17:0:1452:8192,8:mss,nop,ws,nop,nop,sok:df,id+:02
4:54+10:0:1452:8192,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:02
4:49+15:0:1452:8192,8:mss,nop,ws,nop,nop,sok:df,id+:01
4:106+22:0:1452:8192,8:mss,nop,ws,nop,nop,sok:df,id+:01
4:112+16:0:1452:8192,8:mss,nop,ws,nop,nop,sok:df,id+:01
4:116+12:0:1452:8192,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:01
4:118+10:0:1452:8192,8:mss,nop,ws,nop,nop,sok: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/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/136.0.0.0 Safari/537.361
python-requests/2.34.21
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.361
Mozilla/5.0 (Linux; Android 13; 2211133C) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.361
Mozilla/5.0 (iPhone; CPU iPhone OS 17_6 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.6 Mobile/15E148 Safari/604.11
Mozilla/5.0 (iPad; CPU OS 18_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.0 Mobile/15E148 Safari/604.11
Mozilla/5.0 (Linux; Android 12; SM-G991B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.361
Mozilla/5.0 (Linux; Android 13; Pixel 6 Pro) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.361

Country

fingerprintco-occurrences
IT · Italy2
DE · Germany1
CA · Canada1
GB · United Kingdom1
ES · Spain1
TW · Taiwan1
LV · Latvia1
BA · Bosnia & Herzegovina1

Network (ASN)

fingerprintco-occurrences
AS202870 · Dimensione S.r.l.2
AS3352 · TELEFONICA DE ESPANA S.A.U.1
AS3320 · Deutsche Telekom AG1
AS577 · Bell Canada1
AS2856 · British Telecommunications Limited1
AS3462 · Data Communication Business Group1
AS9146 · BIHNET Autonomus System1
AS24921 · Latvijas Mobilais Telefons SIA1

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