TCP SYN (p0f)

4:41+23:0:1412:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df,ecn:0

first seen 2026-06-21 17:03 · last seen 2026-06-21 17:04 · JSON

Decomposed attributes

IP version4
Initial TTL41+23
Options length0
MSS1412
Window size65535
Window scale6
Options layoutmss,nop,ws,nop,nop,ts,sok,eol+1
Quirksdf,ecn
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
t13d5212h1_b262b3658495_8e6e362c5eac Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.21.0, node-fetch 24.19.0, node-fetch 22.23.1, +9 more.The fingerprint page shows the full measured match list. More on the catalog.1
t13d1517h2_8daaf6152771_dcad5a0539911

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr13enus_82d96efe40c3_000000000000_0000000000001
ge11nn06*000_04a9c46d9108_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-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 152.0.7977.83, +85 more.The fingerprint page shows the full measured match list. More on the catalog.1

User-Agent

fingerprintco-occurrences
PriceTrackBot/1.0 (+https://pricetrack.dev/bot)1
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) HeadlessChrome/148.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
KE · Kenya2

Network (ASN)

fingerprintco-occurrences
AS328986 · Vayacom Limited2

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
q13d0312h3_55b375c5d22e_178839b6cec11