TCP SYN (p0f)

4:43+21:0:1410:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:id-:0

first seen 2026-09-06 00:01 · last seen 2026-09-06 00:01 · JSON

Decomposed attributes

IP version4
Initial TTL43+21
Options length0
MSS1410
Window size65535
Window scale6
Options layoutmss,nop,ws,nop,nop,ts,sok,eol+1
Quirksid-
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
t13d3112h1_e8f1e7e78f70_8d633dac7124 Match?Exact match in Thumbprint's published controlled catalog captures: curl 7.88.1.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn030000_fe444ad14866_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.16.0, curl 7.88.1, curl 8.21.0, +1 more.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-1-1-8-4-0-0_1410_61

User-Agent

fingerprintco-occurrences
curl/8.1.21

Country

fingerprintco-occurrences
TW · Taiwan1

Network (ASN)

fingerprintco-occurrences
AS9674 · Far EastTone Telecommunication Co., Ltd.1