TCP SYN (JA4T)

64240_2-4-8-1-3_1440_9

first seen 2026-07-14 03:43 · last seen 2026-07-31 12:44 · JSON

Decomposed attributes

TCP window64240
Option kinds2-4-8-1-3
MSS1440
Window scale9

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
t13d1812h1_85036bcba153_d41ae481755e12
t13d3013h2_1d37bd780c83_8537cf56674e1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn05enus_16a7191cb35b_000000000000_0000000000009
ge11nn040000_e1d2031bdfea_000000000000_0000000000003
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.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, +7 more.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (p0f)

fingerprintco-occurrences
4:45+19:0:1440:mss*44,9:mss,sok,ts,nop,ws:df,id+:08
4:44+20:0:1440:mss*44,9:mss,sok,ts,nop,ws:df,id+:03
4:43+21:0:1440:mss*44,9:mss,sok,ts,nop,ws:df,id+:01
4:49+15:0:1440:mss*44,9:mss,sok,ts,nop,ws:df,id+:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; AzureAI-SearchBot/1.0;12
curl/8.14.11

Country

fingerprintco-occurrences
US · United States12
ID · Indonesia1

Network (ASN)

fingerprintco-occurrences
AS8075 · Microsoft Corporation12
AS58485 · WIFIAN ID1