TCP SYN (JA4T)

64240_2-1-3-1-1-4_1280_8

first seen 2026-08-29 04:31 · last seen 2026-10-23 02:39 · 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 window64240
Option kinds2-1-3-1-1-4
MSS1280
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
t13d4312h1_c7886603b240_b26ce05bbdd62
t12d4907h1_730fb1b0ac6a_8587f467d9ea1
t12d650700_0dd215169a35_4446390ac2241
t13d2913h1_723694b0fccc_5671b5df50291

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.2
ge11nr11enau_835281d8e5d9_000000000000_0000000000001
ge11nr08enus_12041bebc190_000000000000_0000000000001
ge11nn06enus_c0344d278358_000000000000_0000000000001

TCP SYN (p0f)

fingerprintco-occurrences
4:117+11:0:1280:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:02
4:110+18:0:1280:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:01
4:114+14:0:1280:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:01
4:113+15:0:1280:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn: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/123.0.0.0 Safari/537.361
Mozlila/5.0 (Linux; Android 7.0; SM-G892A Bulid/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/60.0.3112.107 Moblie Safari/537.361
Mozilla/5.0 (iPhone; CPU iPhone OS 17_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.3 Mobile/15E148 Safari/604.11
Mozilla/6.4 (Windows NT 11.1) Gecko/2010102 Firefox/99.01

Country

fingerprintco-occurrences
US · United States3
AU · Australia1
ID · Indonesia1

Network (ASN)

fingerprintco-occurrences
AS22295 · Advin Services LLC2
AS7545 · TPG Telecom Limited1
AS30600 · Metronet1
AS55666 · PT Media Sarana Data1

TLS supported groups

fingerprintco-occurrences
0017,0019,001c,001b,0018,001a,0016,000e,000d,000b,000c,0009,000a2
001d,0017,001e,0019,0018,0100,0101,0102,0103,0104 Match?Exact match in Thumbprint's published controlled catalog captures: php-guzzle 8.3.1, curl 7.88.1, curl 8.13.0, +10 more.The fingerprint page shows the full measured match list. More on the catalog.1