TCP SYN (p0f)

4:52+12:0:1440:mss*44,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-23 22:16 · last seen 2026-09-04 18:01 · JSON

Distinct clients per day (last 30 days, peak 2/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
MSS1440
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_58ed7828516f9
t13d1515h1_8daaf6152771_de4a06bb82e33

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.9
ge11nn13enus_9db22d02e17a_000000000000_0000000000003

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1440_712

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 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 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.361
Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.2117.157 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.122 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.170 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Brave Chrome/80.0.3987.116 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.79 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4582.189 Safari/537.361

Country

fingerprintco-occurrences
UA · Ukraine3
CO · Colombia3
BD · Bangladesh2
RU · Russia1
IT · Italy1
AL · Albania1
IQ · Iraq1

Network (ASN)

fingerprintco-occurrences
AS149483 · City Online2
AS262220 · HV TELEVISION S.A.S2
AS15377 · TRADITIONAL LLC2
AS12389 · PJSC Rostelecom1
AS207097 · Online Company for Technological Information, Supply of Electronic Equipment and Internet Services Through Wifi Ltd.1
AS204685 · PE KRYVENKO SERGIY ANDRIYOVYCH1
AS266757 · SATELITAL TELECOMUNICACIONES S.A.C1
AS212766 · NetSysCom sh.p.k1
AS5394 · Unidata1