TCP SYN (p0f)

4:54+10:0:1460:62727,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-16 15:27 · last seen 2026-09-05 01:51 · 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 TTL54+10
Options length0
MSS1460
Window size62727
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
t13d431000_c7886603b240_1f22a2ca17c44
t13d491200_bd868743f55c_7c76daad20ec1
t13d190900_9dc949149365_97f8aa674fd91

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn070000_d53668ba0abf_000000000000_0000000000002
ge11nn040000_cea7da75806b_000000000000_0000000000001
po11nn090000_f7d626a8a3c6_000000000000_0000000000001
po11nn090000_c726d1eba7fe_000000000000_0000000000001
ge11nn050000_57c5e92682a8_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
62727_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/131.0.0.0 Safari/537.363
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.100 Safari/537.361
Mozilla/5.0 (Linux; Android 7.0; Alcatel_5044R) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.111 Mobile Safari/537.361

Country

fingerprintco-occurrences
US · United States6

Network (ASN)

fingerprintco-occurrences
AS14618 · Amazon.com, Inc.5
AS16509 · Amazon.com, Inc.1