TCP SYN (JA4T)

64240_2-1-3-1-1-4_1354_8

first seen 2026-09-09 01:57 · last seen 2026-09-10 00:30 · JSON

Last 7 days (10 observations)

Distinct clients per day (last 30 days, peak 12/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

TCP window64240
Option kinds2-1-3-1-1-4
MSS1354
Window scale8

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
t13d2013h1_2b729b4bf6f3_e24568c0d44016

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.16

TCP SYN (p0f)

fingerprintco-occurrences
4:113+15:0:1354:mss*44,8:mss,nop,ws,nop,nop,sok::06
4:112+16:0:1354:mss*44,8:mss,nop,ws,nop,nop,sok::05
4:111+17:0:1354:mss*44,8:mss,nop,ws,nop,nop,sok::02
4:114+14:0:1354:mss*44,8:mss,nop,ws,nop,nop,sok::01
4:110+18:0:1354:mss*44,8:mss,nop,ws,nop,nop,sok::01
4:108+20:0:1354:mss*44,8:mss,nop,ws,nop,nop,sok::01

User-Agent

fingerprintco-occurrences
curl/8.18.016

Country

fingerprintco-occurrences
JP · Japan16

Network (ASN)

fingerprintco-occurrences
AS2514 · NTT PC Communications, Inc.7
AS4713 · NTT DOCOMO BUSINESS,Inc.6
AS9595 · NTT-ME Corporation1
AS4685 · Asahi Net1
AS4725 · SoftBank Corp.1