TCP SYN (JA4T)

32476_2-4-8-1-3_1412_7

first seen 2026-07-23 18:54 · last seen 2026-10-19 05:55 · 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 window32476
Option kinds2-4-8-1-3
MSS1412
Window scale7

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
t13d131000_f57a46bbacb6_e7c285222651 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.23.12.The fingerprint page shows the full measured match list. More on the catalog.36
t13i170900_5b57614c22b0_78e6aca7449b1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr05zhcn_f3bb7aa45ec4_000000000000_00000000000019
ge11nr050000_3658ef221638_000000000000_00000000000014
ge11nn03zhcn_295e410d3834_000000000000_0000000000003
ge11nn070000_ca40d4d1460e_000000000000_0000000000001

TCP SYN (p0f)

fingerprintco-occurrences
4:46+18:0:1412:mss*23,7:mss,sok,ts,nop,ws:df,id+:012
4:45+19:0:1412:mss*23,7:mss,sok,ts,nop,ws:df,id+:09
4:43+21:0:1412:mss*23,7:mss,sok,ts,nop,ws:df,id+:03
4:49+15:0:1412:mss*23,7:mss,sok,ts,nop,ws:df,id+:03
4:39+25:0:1412:mss*23,7:mss,sok,ts,nop,ws:df,id+:02
4:41+23:0:1412:mss*23,7:mss,sok,ts,nop,ws:df,id+:02
4:47+17:0:1412:mss*23,7:mss,sok,ts,nop,ws:df,id+:02
4:42+22:0:1412:mss*23,7:mss,sok,ts,nop,ws:df,id+:01
4:50+14:0:1412:mss*23,7:mss,sok,ts,nop,ws:df,id+:01
4:37+27:0:1412:mss*23,7: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/537.36 Edg/120.0.0.022
Mozilla/5.0 (compatible; foda-scanner/0.1)14
libredtail-http1

Country

fingerprintco-occurrences
HK · Hong Kong SAR China17
US · United States8
SG · Singapore3
KR · South Korea2
IN · India2
PH · Philippines2
UZ · Uzbekistan2
JP · Japan1

Network (ASN)

fingerprintco-occurrences
AS135377 · UCLOUD INFORMATION TECHNOLOGY (HK) LIMITED37

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,0018,0019 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 157.0.1, firefox-esr 153.5.1esr, firefox 158.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.5
0a0a,11ec,001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 155.0.8059.40, chrome 156.0.8078.73, chromium 156.0.8078.47, +8 more.The fingerprint page shows the full measured match list. More on the catalog.1