TCP SYN (JA4T)

65535_2-4-8-1-3_1368_2

first seen 2026-08-03 18:59 · last seen 2026-08-15 18:26 · JSON

Decomposed attributes

TCP window65535
Option kinds2-4-8-1-3
MSS1368
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
t13d3112h2_e8f1e7e78f70_b26ce05bbdd6 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.5.0, php-curl 7.88.1.The fingerprint page shows the full measured match list. More on the catalog.10
t13d3013h2_1d37bd780c83_8537cf56674e2

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 8.18.0, +9 more.The fingerprint page shows the full measured match list. More on the catalog.12

HTTP/2 frames (Akamai)

fingerprintco-occurrences
3:100;4:10485760;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.7.1, curl 8.5.0.The fingerprint page shows the full measured match list. More on the catalog.10
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, +7 more.The fingerprint page shows the full measured match list. More on the catalog.2

TCP SYN (p0f)

fingerprintco-occurrences
4:44+20:0:1368:65535,2:mss,sok,ts,nop,ws:df,id+:04
4:45+19:0:1368:65535,2:mss,sok,ts,nop,ws:df,id+:03
4:42+22:0:1368:65535,2:mss,sok,ts,nop,ws:df,id+:02
6:49+15:0:1368:65535,2:mss,sok,ts,nop,ws::01
4:46+18:0:1368:65535,2:mss,sok,ts,nop,ws:df,id+:01
4:47+17:0:1368:65535,2:mss,sok,ts,nop,ws:df,id+:01

User-Agent

fingerprintco-occurrences
curl/8.5.010
curl/8.14.12

Country

fingerprintco-occurrences
US · United States12

Network (ASN)

fingerprintco-occurrences
AS6167 · Verizon Business12