TCP SYN (p0f)

4:117+11:0:1420:mss*46,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:0

first seen 2026-06-11 10:58 · last seen 2026-06-22 10:31 · JSON

Decomposed attributes

IP version4
Initial TTL117+11
Options length0
MSS1420
Window sizemss*46
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
t12d860600_e18388e7f3a3_a1e9356827954
t13d1411h2_cbb2034c60b8_e7c2852226513

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn05enus_a1be516b8e6e_000000000000_0000000000004
ge20nr030000_0db47b7d240d_000000000000_0000000000003

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:4194304;6:10485760|1073741824|0|a,m,p,s Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13, go-net/http 1.23.12.The fingerprint page shows the full measured match list. More on the catalog.3

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.69 Safari/537.364
Mozilla/5.0 (compatible; CMS-Checker/1.0; +https://example.com)3

Country

fingerprintco-occurrences
US · United States5
BE · Belgium2

Network (ASN)

fingerprintco-occurrences
AS396982 · Google LLC7