TCP SYN (JA4T)

65535_2-4-8-1-3_1440_2

first seen 2026-08-18 06:59 · last seen 2026-09-23 10:25 · JSON

Decomposed attributes

TCP window65535
Option kinds2-4-8-1-3
MSS1440
Window scale2

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.1
t13d2013h1_2b729b4bf6f3_e24568c0d4401

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.1
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

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.1

TCP SYN (p0f)

fingerprintco-occurrences
6:53+11:0:1440:65535,2:mss,sok,ts,nop,ws::01
6:51+13:0:1440:65535,2:mss,sok,ts,nop,ws::01

User-Agent

fingerprintco-occurrences
curl/8.14.11
curl/8.21.01

Country

fingerprintco-occurrences
US · United States2

Network (ASN)

fingerprintco-occurrences
AS701 · Verizon Business1
AS27425 · IdeaTek Telcom, LLC1