TCP SYN (p0f)

4:48+16:0:1400:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:ecn:0

first seen 2026-07-04 09:51 · last seen 2026-07-04 09:51 · JSON

Decomposed attributes

IP version	`4`
Initial TTL	`48+16`
Options length	`0`
MSS	`1400`
Window size	`65535`
Window scale	`6`
Options layout	`mss,nop,ws,nop,nop,ts,sok,eol+1`
Quirks	`ecn`
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
`t13d2013h2_a09f3c656075_7f0f34a4126d` Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.6.2, safari 26.4, +2 more.The fingerprint page shows the full measured match list. More on the catalog.	3

HTTP request (JA4H)

fingerprint	co-occurrences
`ge20nr09enus_5ad46a65401a_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.6.2, safari 26.6.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.	2
`ge20nn08enus_b65a39d4559c_000000000000_000000000000`	1

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`2:0;3:100;4:2097152;9:1\|10420225\|0\|m,s,a,p` Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.6.2, safari 26.5, +3 more.The fingerprint page shows the full measured match list. More on the catalog.	3

TCP SYN (JA4T)

fingerprint	co-occurrences
`65535_2-1-3-1-1-8-4-0-0_1400_6`	3

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/26.5 Safari/605.1.15`	3

Country

fingerprint	co-occurrences
`RU` · Russia	3

Network (ASN)

fingerprint	co-occurrences
`AS42024` · CryptoPro LTD	3