TCP SYN (p0f)

4:116+12:0:1414:mss*44,8:mss,nop,ws,nop,nop,sok::0

first seen 2026-09-11 05:05 · last seen 2026-09-14 02:47 · JSON

Last 7 days (8 observations)

Distinct clients per day (last 30 days, peak 7/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 TTL116+12
Options length0
MSS1414
Window sizemss*44
Window scale8
Options layoutmss,nop,ws,nop,nop,sok
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
t13d2012h1_2b729b4bf6f3_9e7b989ebec86
t13d2013h1_2b729b4bf6f3_e24568c0d4402

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn030000_fe444ad14866_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.16.0.The fingerprint page shows the full measured match list. More on the catalog.8

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-1-3-1-1-4_1414_88

User-Agent

fingerprintco-occurrences
curl/8.8.05
curl/8.18.02
'Mozilla/5.01

Country

fingerprintco-occurrences
JP · Japan8

Network (ASN)

fingerprintco-occurrences
AS2514 · NTT PC Communications, Inc.4
AS10013 · FreeBit Co.,Ltd.3
AS4685 · Asahi Net1