TCP SYN (p0f)

4:109+19:0:1412:65535,8:mss,sok,ts,nop,ws::0

first seen 2026-10-04 09:44 · last seen 2026-10-25 03:03 · 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 TTL109+19
Options length0
MSS1412
Window size65535
Window scale8
Options layoutmss,sok,ts,nop,ws
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
t13d181300_e8a523a41297_43ade6aba3df2
t13d1712h2_5b57614c22b0_ef7df7f74e481

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn070000_fad2baeaef05_000000000000_0000000000001
ge11nn070000_5583da70a3c4_000000000000_0000000000001
ge11nn080000_6b4f92f3c7df_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;1:4096;8:0;3:1024;4:33554432|25100289|0|m,s,p,a1

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-8-1-3_1412_83

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Linux; Android 6.0.1; Nexus 5X Build/MMB29P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/153.0.8010.52 Mobile Safari/537.36 (compatible; Googlebot/2.1; +http://www.google.com/bot.html)2
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36 Chrome-Lighthouse1

Country

fingerprintco-occurrences
US · United States3

Network (ASN)

fingerprintco-occurrences
AS15169 · Google LLC3

TLS supported groups

fingerprintco-occurrences
00171