TCP SYN (p0f)

6:111+17:0:1440:mss*44,8:mss,nop,ws,nop,nop,sok::0

first seen 2026-10-15 07:23 · last seen 2026-10-20 17:07 · JSON

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

IP version6
Initial TTL111+17
Options length0
MSS1440
Window sizemss*44
Window scale8
Options layoutmss,nop,ws,nop,nop,sok
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
t13d1516h2_8daaf6152771_02713d6af862 Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 134.0.6998.35, chromium 133.0.6943.16.The fingerprint page shows the full measured match list. More on the catalog.8
t13d3112h2_e8f1e7e78f70_b26ce05bbdd6 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.5.0, php-curl 7.88.1.The fingerprint page shows the full measured match list. More on the catalog.2

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr12dede_f373c1189b47_000000000000_0000000000006
ge20nn020000_5594a17e7e7e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0, curl 8.13.0, +11 more.The fingerprint page shows the full measured match list. More on the catalog.2
ge20nn13dede_0c2c1d640f3e_000000000000_0000000000002

HTTP/2 frames (Akamai)

fingerprintco-occurrences
3:100;4:10485760;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0.The fingerprint page shows the full measured match list. More on the catalog.2
1:65536;2:0;4:6291456;6:262144;64026:606064379|15663105|1:1:0:256|m,a,s,p1
1:65536;2:0;4:6291456;6:262144;47866:2645542512|15663105|1:1:0:220|m,a,s,p1
1:65536;2:0;4:6291456;6:262144;51754:1062186365|15663105|1:1:0:220|m,a,s,p1
1:65536;2:0;4:6291456;6:262144;6906:2168536383|15663105|1:1:0:220|m,a,s,p1
1:65536;2:0;4:6291456;6:262144;64090:798614204|15663105|1:1:0:220|m,a,s,p1
1:65536;2:0;4:6291456;6:262144;35482:2005955479|15663105|1:1:0:256|m,a,s,p1
1:65536;2:0;4:6291456;6:262144;64186:4056359346|15663105|1:1:0:220|m,a,s,p1
1:65536;2:0;4:6291456;6:262144;2586:1825113091|15663105|1:1:0:220|m,a,s,p1

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-1-3-1-1-4_1440_810

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/155.0.0.0 Safari/537.368
curl/8.5.02

Country

fingerprintco-occurrences
DE · Germany10

Network (ASN)

fingerprintco-occurrences
AS3209 · Vodafone GmbH10

TLS supported groups

fingerprintco-occurrences
0a0a,6399,001d,0017,00188
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.2