TCP SYN (p0f)

4:109+19:0:1440:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:0

first seen 2026-06-22 12:32 · last seen 2026-07-14 23:36 · JSON

Decomposed attributes

IP version4
Initial TTL109+19
Options length0
MSS1440
Window sizemss*44
Window scale8
Options layoutmss,nop,ws,nop,nop,sok
Quirksdf,id+,ecn
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
t13d2212h2_231e334592e8_36bf25f296df2
t13d131100_f57a46bbacb6_ab7e3b40a677 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.5, go-net/http 1.26.4.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr060000_a284f3d85baf_000000000000_0000000000001
ge20nn040000_4fc62b8ba0b7_000000000000_0000000000001
ge20nn050000_3e1cb8dc9fc3_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:65535|67043329|0|m,s,a,p2

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-1-3-1-1-4_1440_82

User-Agent

fingerprintco-occurrences
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm) Chrome/116.0.1938.76 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
US · United States3

Network (ASN)

fingerprintco-occurrences
AS8075 · Microsoft Corporation3