TCP SYN (p0f)

4:53+11:0:1460:mss*29,13:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-29 16:02 · last seen 2026-08-27 19:50 · JSON

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 TTL53+11
Options length0
MSS1460
Window sizemss*29
Window scale13
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
t12d130600_2d7513195f68_e51b7354d87f2
t13d2913h1_723694b0fccc_5671b5df50291

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn050000_57c5e92682a8_000000000000_0000000000001
ge11nr050000_57c5e92682a8_000000000000_0000000000001
ge11nr11enus_835281d8e5d9_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
42340_2-4-8-1-3_1460_133

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.2.1 Safari/605.1.11
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.3.1 Safari/605.1.11
Mozilla/5.0 (iPhone; CPU iPhone OS 16_7 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.7 Mobile/15E148 Safari/604.11

Country

fingerprintco-occurrences
US · United States3

Network (ASN)

fingerprintco-occurrences
AS36352 · HostPapa2
AS6079 · RCN1