TCP SYN (JA4T)

62727_2-4-8-1-3_1460_8

first seen 2026-06-29 23:13 · last seen 2026-06-29 23:13 · JSON

Decomposed attributes

TCP window62727
Option kinds2-4-8-1-3
MSS1460
Window scale8

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
t13d1516h2_8daaf6152771_02713d6af862 Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 134.0.6998.35, chromium 133.0.6943.16.The fingerprint page shows the full measured match list. More on the catalog.1
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

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr12enus_f8a3a1e39dc3_000000000000_0000000000001
ge20nn120000_1d5643f8516d_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: chromium 151.0.7922.34, chromium 148.0.7778.96, chromium 147.0.7727.15, +12 more.The fingerprint page shows the full measured match list. More on the catalog.1

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, +43 more.The fingerprint page shows the full measured match list. More on the catalog.1
1:65536;2:0;4:6291456;6:262144;51898:1633481612|15663105|1:1:0:220|m,a,s,p1

TCP SYN (p0f)

fingerprintco-occurrences
4:43+21:0:1460:62727,8:mss,sok,ts,nop,ws:df,id+:01
4:58+6:0:1460:62727,8:mss,sok,ts,nop,ws:df,id+:01

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/129.0.0.0 Safari/537.361
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/126.0.6478.182 Safari/537.361

Country

fingerprintco-occurrences
US · United States1
SG · Singapore1

Network (ASN)

fingerprintco-occurrences
AS16509 · Amazon.com, Inc.2

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).

fingerprintlinked observations
q13d0311h3_55b375c5d22e_653d80c3fe9d1