TCP SYN (p0f)

4:56+8:0:1460:65535,6:mss,nop,ws,sok,ts:df,id+:0

first seen 2026-06-30 19:10 · last seen 2026-09-19 13:52 · JSON

Decomposed attributes

IP version4
Initial TTL56+8
Options length0
MSS1460
Window size65535
Window scale6
Options layoutmss,nop,ws,sok,ts
Quirksdf,id+
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
t13d260900_6d1bcf7a4624_188c7f576dcd1
t13d1518h2_8daaf6152771_4980c97edce01

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr11enus_0bc436807bd0_000000000000_0000000000001
ge20nr14engb_e7796bbdab6f_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 151.0.7922.34, chrome 151.0.7922.137, +57 more.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-4-8_1460_62

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:152.0) Gecko/20100101 Firefox/152.01
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/155.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
US · United States1
GB · United Kingdom1

Network (ASN)

fingerprintco-occurrences
AS22616 · ZSCALER, INC.1
AS62044 · Zscaler Switzerland GmbH1