TCP SYN (p0f)

6:57+7:0:1440:mss*30,9:mss,sok,ts,nop,ws:flow:0

first seen 2026-07-01 15:09 · last seen 2026-08-30 15:56 · JSON

Decomposed attributes

IP version6
Initial TTL57+7
Options length0
MSS1440
Window sizemss*30
Window scale9
Options layoutmss,sok,ts,nop,ws
Quirksflow
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
t13d3013h2_1d37bd780c83_8537cf56674e Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.18.0.The fingerprint page shows the full measured match list. More on the catalog.3
t13d131100_f57a46bbacb6_e5728521abd41

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn020000_5594a17e7e7e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0, curl 8.13.0, +11 more.The fingerprint page shows the full measured match list. More on the catalog.3
ge11nn040000_e1d2031bdfea_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
3:100;4:65536;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, curl 8.18.0, curl 8.21.0, +8 more.The fingerprint page shows the full measured match list. More on the catalog.3

TCP SYN (JA4T)

fingerprintco-occurrences
43200_2-4-8-1-3_1440_94

User-Agent

fingerprintco-occurrences
curl/8.20.03
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.74 Safari/537.36 Edg/99.0.1150.461

Country

fingerprintco-occurrences
US · United States4

Network (ASN)

fingerprintco-occurrences
AS393886 · Leaseweb USA, Inc.3
AS53667 · FranTech Solutions1