TCP SYN (p0f)

4:115+13:0:1452:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0

first seen 2026-07-04 15:22 · last seen 2026-09-11 06:47 · JSON

Last 7 days (1 observations)

Distinct clients per day (last 30 days, peak 8/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 TTL115+13
Options length0
MSS1452
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.21
t13d2913h1_723694b0fccc_5671b5df502919
t13d1515h1_8daaf6152771_0a20fe35d3a53
t13d1516h2_8daaf6152771_806a8c22fdea Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chrome 151.0.7922.137, chromium 151.0.7922.34, +24 more.The fingerprint page shows the full measured match list. More on the catalog.2
t13d201200_2b729b4bf6f3_e24568c0d4401
t13d3013h1_1d37bd780c83_8537cf56674e1
t13d1515h1_8daaf6152771_de4a06bb82e31
t13d1516h1_8daaf6152771_1a63afa7c4781

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr11eses_835281d8e5d9_000000000000_0000000000008
ge20nr16eses_94fdc06e0694_000000000000_0000000000007
ge11nr11itit_835281d8e5d9_000000000000_0000000000005
ge11nn13enus_9db22d02e17a_000000000000_0000000000004
ge20nr16soso_94fdc06e0694_000000000000_0000000000002
ge11nn11eses_835281d8e5d9_000000000000_0000000000002
ge20nr16itit_94fdc06e0694_000000000000_0000000000002
ge11nn11itit_835281d8e5d9_000000000000_0000000000002
ge20nr13itit_0c2c1d640f3e_000000000000_0000000000001
ge20nr12itit_54b4638ab28b_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.22
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_1452_849

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.363
Mozilla/5.0 (iPhone; CPU iPhone OS 18_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/150.0.0.0 Mobile/15E148 Safari/604.13
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/604.13
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.362
Mozilla/5.0 (iPhone; CPU iPhone OS 18_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.0 Mobile/15E148 Safari/604.12
Mozilla/5.0 (iPhone; CPU iPhone OS 16_7 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.7 Mobile/15E148 Safari/604.12
Mozilla/5.0 (Linux; Android 14; SM-S921B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.362
Mozilla/5.0 (iPhone; CPU iPhone OS 17_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/150.0.0.0 Mobile/15E148 Safari/604.12
Mozilla/5.0 (Linux; Android 13; Redmi Note 12) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.362
Mozilla/5.0 (Linux; Android 13; 2211133C) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.362

Country

fingerprintco-occurrences
ES · Spain20
IT · Italy11
BY · Belarus3
PK · Pakistan3
CA · Canada2
MX · Mexico2
IL · Israel2
LU · Luxembourg1
BR · Brazil1
GB · United Kingdom1

Network (ASN)

fingerprintco-occurrences
AS3352 · TELEFONICA DE ESPANA S.A.U.12
AS3269 · Telecom Italia S.p.A.9
AS12430 · VODAFONE ESPANA S.A.U.8
AS17557 · Pakistan Telecommunication Company Limited3
AS6697 · Republican Unitary Telecommunication Enterprise Beltelecom3
AS852 · TELUS Communications Inc.2
AS1680 · Cellcom Fixed Line Communication L.P2
AS30722 · Fastweb SpA2
AS8151 · Uninet S.A. de C.V.2
AS36903 · Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM1

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