TCP SYN (p0f)

4:49+15:0:1330:mss*49,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-10-28 07:27 · last seen 2026-10-28 07:27 · 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 TTL49+15
Options length0
MSS1330
Window sizemss*49
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
t13d1515h1_8daaf6152771_0a20fe35d3a51

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn040000_8391bea91fb6_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
65170_2-4-8-1-3_1330_71

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (compatible; archive.org_bot +http://archive.org/details/archive.org_bot) Zeno/a97483f warc/v0.8.1051

Country

fingerprintco-occurrences
CA · Canada1

Network (ASN)

fingerprintco-occurrences
AS399784 · Internet Archive Canada1

TLS supported groups

fingerprintco-occurrences
0a0a,001d,0017,00181