TCP SYN (p0f)

4:51+13:0:1412:mss*44,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-20 07:25 · last seen 2026-09-11 04:51 · JSON

Last 7 days (1 observations)

Distinct clients per day (last 30 days, peak 7/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 TTL51+13
Options length0
MSS1412
Window sizemss*44
Window scale7
Options layoutmss,sok,ts,nop,ws
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
t13d4412h1_fd39b124ee10_58ed7828516f29
t13d1515h1_8daaf6152771_de4a06bb82e316
t13d1515h1_8daaf6152771_0a20fe35d3a510
t13d1516h1_8daaf6152771_1a63afa7c4782

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn050000_b223a0ebb0b5_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: python-requests 2.34.2, python-requests 2.33.1, python-requests 2.32.3.The fingerprint page shows the full measured match list. More on the catalog.29
ge11nn13enus_9db22d02e17a_000000000000_00000000000022
ge11nn14enus_4a2973d235de_000000000000_0000000000006

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1412_757

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.363
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.363
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.67 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.362

Country

fingerprintco-occurrences
MX · Mexico14
BR · Brazil7
DZ · Algeria6
DE · Germany5
AL · Albania4
ES · Spain3
PK · Pakistan3
MA · Morocco2
CI · Côte d’Ivoire2
KZ · Kazakhstan1

Network (ASN)

fingerprintco-occurrences
AS8151 · Uninet S.A. de C.V.9
AS36947 · Telecom Algeria6
AS28573 · Claro NXT Telecomunicacoes Ltda4
AS3209 · Vodafone GmbH4
AS17072 · TOTAL PLAY TELECOMUNICACIONES, S.A.P.I. DE C.V.4
AS36924 · GVA Cote d'Ivoire SAS3
AS36903 · Office National des Postes et Telecommunications ONPT (Maroc Telecom) / IAM2
AS9198 · JSC Kazakhtelecom1
AS8881 · 1&1 Versatel GmbH1
AS17557 · Pakistan Telecommunication Company Limited1