TCP SYN (p0f)

4:55+9:0:1460:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df:0

first seen 2026-07-01 15:28 · last seen 2026-07-02 14:18 · JSON

Decomposed attributes

IP version	`4`
Initial TTL	`55+9`
Options length	`0`
MSS	`1460`
Window size	`65535`
Window scale	`6`
Options layout	`mss,nop,ws,nop,nop,ts,sok,eol+1`
Quirks	`df`
Payload class	`0`

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)

fingerprint	co-occurrences
`t13d5212h1_b262b3658495_8e6e362c5eac` Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.19.0, node-fetch 22.23.1, node-fetch 24.21.0, +6 more.The fingerprint page shows the full measured match list. More on the catalog.	2

HTTP request (JA4H)

fingerprint	co-occurrences
`ge11nn07*000_fd87022947da_000000000000_000000000000`	1
`ge11nn07*000_131b6413da1e_000000000000_000000000000`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`65535_2-1-3-1-1-8-4-0-0_1460_6`	2

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0 Safari/537.36`	1
`Mozilla/5.0 (compatible; intel-collector/0.1.0; +https://github.com/enterprise-playbook)`	1

Country

fingerprint	co-occurrences
`US` · United States	2

Network (ASN)

fingerprint	co-occurrences
`AS23316` · Bel Air Internet, LLC	1
`AS3356` · Level 3 Parent, LLC	1