TCP SYN (p0f)

4:48+16:0:1339:65535,8:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-03 08:18 · last seen 2026-07-21 07:53 · JSON

Decomposed attributes

IP version	`4`
Initial TTL	`48+16`
Options length	`0`
MSS	`1339`
Window size	`65535`
Window scale	`8`
Options layout	`mss,sok,ts,nop,ws`
Quirks	`df,id+`
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
`t13d1516h2_8daaf6152771_d8a2da3f94cd` Match?Exact match in Thumbprint's published controlled catalog captures: chromium 149.0.7827.102, chrome 149.0.7827.102, chrome 149.0.7827.156, +25 more.The fingerprint page shows the full measured match list. More on the catalog.	1
`t13d4412h1_fd39b124ee10_58ed7828516f`	1

HTTP request (JA4H)

fingerprint	co-occurrences
`ge20nr13enus_b3e540f310f0_000000000000_000000000000`	1
`ge11nn050000_b223a0ebb0b5_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: python-requests 2.34.2, python-requests 2.33.1, python-requests 2.32.3.The fingerprint page shows the full measured match list. More on the catalog.	1

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`1:65536;2:0;4:6291456;6:262144\|15663105\|1:1:0:220\|m,a,s,p` Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chromium 149.0.7827.102, chrome 149.0.7827.102, +59 more.The fingerprint page shows the full measured match list. More on the catalog.	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`65535_2-4-8-1-3_1339_8`	2

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (Linux; Android 16; 24040RN64Y Build/BP2A.250605.031.A3; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/149.0.7827.163 Mobile Safari/537.36`	1
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.84 Safari/537.36`	1

Country

fingerprint	co-occurrences
`TR` · Turkey	1
`TG` · Togo	1

Network (ASN)

fingerprint	co-occurrences
`AS20978` · TT Mobil Iletisim Hizmetleri A.S	1
`AS24691` · TogoTelecom, Togo	1

Cross-transport links

TLS ClientHello fingerprints observed from the same client via the beacon's correlation id on the other transport (e.g. this stack over TCP ↔ that stack over QUIC).

fingerprint	linked observations
`q13d0311h3_55b375c5d22e_653d80c3fe9d`	1