TCP SYN (p0f)

4:103+25:0:1460:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0

first seen 2026-07-02 00:22 · last seen 2026-09-07 22:25 · JSON

Distinct clients per day (last 30 days, peak 4/day)

Distinct clients are counted by IP-hash per complete UTC day — unlike observation counts this is insensitive to one chatty client, but NAT merges clients and address rotation splits them.

Decomposed attributes

IP version4
Initial TTL103+25
Options length0
MSS1460
Window size65535
Window scale8
Options layoutmss,nop,ws,nop,nop,sok
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
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.7
t13d2913h1_723694b0fccc_5671b5df50293
t13d1515h1_8daaf6152771_de4a06bb82e31

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr13enus_9e6b72014148_000000000000_0000000000001
ge20nn16engb_94fdc06e0694_000000000000_0000000000001
ge20nr16soso_94fdc06e0694_000000000000_0000000000001
ge11nr11engb_b350a6a7c155_000000000000_0000000000001
ge11nr11kokr_835281d8e5d9_000000000000_0000000000001
ge20nr16kokr_94fdc06e0694_000000000000_0000000000001
ge11nn11soso_835281d8e5d9_000000000000_0000000000001
ge20nr16dadk_94fdc06e0694_000000000000_0000000000001
ge20nn16dadk_94fdc06e0694_000000000000_0000000000001
ge20nr16zhsg_94fdc06e0694_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, +43 more.The fingerprint page shows the full measured match list. More on the catalog.6
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)

fingerprintco-occurrences
65535_2-1-3-1-1-4_1460_811

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (iPhone; CPU iPhone OS 17_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.4 Mobile/15E148 Safari/604.12
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36 OPR/135.0.0.02
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.67 Safari/537.361
Mozilla/5.0 (Linux; Android 14; Pixel 9 Pro) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.361
Mozilla/5.0 (Linux; Android 14; 23127PN0CC) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.361
Mozilla/5.0 (Linux; Android 14; Pixel 9) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.361
Mozilla/5.0 (Linux; Android 12; SM-A536B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.361
Mozilla/5.0 (iPad; CPU OS 17_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.4 Mobile/15E148 Safari/604.11

Country

fingerprintco-occurrences
KR · South Korea2
GB · United Kingdom2
DK · Denmark2
AU · Australia1
SG · Singapore1
AR · Argentina1
IL · Israel1
VE · Venezuela1

Network (ASN)

fingerprintco-occurrences
AS17858 · LG POWERCOMM2
AS44869 · FIBIA P/S2
AS135887 · Belong (Telstra Limited)1
AS201838 · Community Fibre Limited1
AS9506 · Singtel Fibre Broadband1
AS12849 · Hot-Net internet services Ltd.1
AS264628 · CORPORACION FIBEX TELECOM, C.A.1
AS27747 · Telecentro S.A.1
AS212655 · YouFibre Limited1

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