TCP SYN (JA4T)

62720_2-4-8-1-3_1460_7

first seen 2026-07-31 22:38 · last seen 2026-09-15 09:18 · JSON

Last 7 days (3 observations)

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 window62720
Option kinds2-4-8-1-3
MSS1460
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
t13d181100_85036bcba153_d41ae481755e2
t13i170900_5b57614c22b0_78e6aca7449b2
t13d1714h1_5b57614c22b0_43ade6aba3df1
t13d1011h1_61a7ad8aa9b6_3fcd1a44f3e31
t13d3613h1_018971650b2c_b7ee5e09e9b31

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn040000_e1d2031bdfea_000000000000_0000000000002
ge11nn050000_5ddb03fb9e99_000000000000_0000000000001
ge11nn040000_cf1edba2959c_000000000000_0000000000001
ge11nn070000_d0d63ed74832_000000000000_0000000000001
ge11nn050000_c71bbc472f37_000000000000_0000000000001
ge11nn06enus_98e697c2fa06_000000000000_0000000000001

TCP SYN (p0f)

fingerprintco-occurrences
4:56+8:0:1460:62720,7:mss,sok,ts,nop,ws:df,id+:02
4:54+10:0:1460:62720,7:mss,sok,ts,nop,ws:df,id+:02
4:46+18:0:1460:62720,7:mss,sok,ts,nop,ws:df,id+:02
4:40+24:0:1460:62720,7:mss,sok,ts,nop,ws:df,id+:01

User-Agent

fingerprintco-occurrences
libredtail-http2
GeneralCrawlBot/0.12
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.361
f1tym1-scraper/1.0 (+https://f1tym1.com/sources/)1
understory/0.1 (CT research; https://github.com/0x4b) +contact-via-repo1

Country

fingerprintco-occurrences
SG · Singapore2
SA · Saudi Arabia2
US · United States1
BR · Brazil1
AE · United Arab Emirates1

Network (ASN)

fingerprintco-occurrences
AS31898 · Oracle Corporation7