TCP SYN (p0f)

4:52+12:0:1452:mss*44,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-20 12:24 · last seen 2026-09-15 02:51 · JSON

Last 7 days (1 observations)

Distinct clients per day (last 30 days, peak 10/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 TTL52+12
Options length0
MSS1452
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_58ed7828516f20
t13d1515h1_8daaf6152771_de4a06bb82e319
t13d1515h1_8daaf6152771_0a20fe35d3a511
t13d1516h1_8daaf6152771_1a63afa7c4785
t13d2012h1_2b729b4bf6f3_9e7b989ebec81

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn13enus_9db22d02e17a_000000000000_00000000000027
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.20
ge11nn14enus_4a2973d235de_000000000000_0000000000008
ge11nn030000_fe444ad14866_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.16.0.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1452_756

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.366
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.365
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.364
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.363
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.363
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 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 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.41 Safari/537.362

Country

fingerprintco-occurrences
GB · United Kingdom13
CO · Colombia8
ES · Spain5
IL · Israel5
MX · Mexico3
MK · Macedonia3
RU · Russia2
MA · Morocco2
DZ · Algeria2
MT · Malta2

Network (ASN)

fingerprintco-occurrences
AS2856 · British Telecommunications Limited11
AS6810 · "Bezeq"- THE ISRAEL TELECOMMUNICATION CORP. LTD.5
AS266860 · CONEXION DIGITAL EXPRESS S.A.S.5
AS8151 · Uninet S.A. de C.V.3
AS6821 · Makedonski Telekom AD-Skopje3
AS3352 · TELEFONICA DE ESPANA S.A.U.2
AS6871 · Plusnet2
AS36947 · Telecom Algeria2
AS19429 · ETB - Colombia2
AS12430 · VODAFONE ESPANA S.A.U.2