TCP SYN (p0f)

4:61+3:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-05 06:25 · last seen 2026-10-28 07:27 · JSON

Last 7 days (1 observations)

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

IP version4
Initial TTL61+3
Options length0
MSS1460
Window sizemss*44
Window scale7
Options layoutmss,sok,ts,nop,ws
Quirksdf,id+
Payload class0

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
t13d1812h1_85036bcba153_b26ce05bbdd63
t13d591000_a33745022dd6_1f22a2ca17c42

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn06en00_692bb916e76d_000000000000_0000000000003
ge11nn07ro00_71b742b5154a_000000000000_0000000000002

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_75

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/147.0.0.0 Safari/537.363
Mozilla/5.0 (compatible; The Lounge IRC Client; +https://github.com/thelounge/thelounge) facebookexternalhit/1.1 Twitterbot/1.02

Country

fingerprintco-occurrences
US · United States5

Network (ASN)

fingerprintco-occurrences
AS36352 · HostPapa5

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.1