TCP SYN (p0f)

4:60+4:0:1354:mss*44,9:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-10-10 10:21 · last seen 2026-10-12 16:31 · JSON

Distinct clients per day (last 30 days, peak 3/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 TTL60+4
Options length0
MSS1354
Window sizemss*44
Window scale9
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
t13d1010h2_a57d05f9818c_5603904660151
t13d0911h2_c9b5742070f5_9ced094328c91
t13d0911h2_7ff5fc126eb8_b11bb3600f941
t13d1212h2_75f9918a20bf_cbb9361b6bf91
t13d1111h2_61f75498594a_9ced094328c91
t13d0910h2_4973e555af1a_5603904660151

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn04enus_989c7cc05c9b_000000000000_0000000000006

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144;4:1048576|15663105|1:0:0:256|m,a,s,p6

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1354_96

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.361
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.6 Safari/537.361
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.5 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.3 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/14.1.4 Safari/605.1.151
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.4.3 Safari/605.1.151

Country

fingerprintco-occurrences
US · United States6

Network (ASN)

fingerprintco-occurrences
AS401401 · Unredacted Inc6