TCP SYN (p0f)

4:41+23:0:1420:65535,6:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-20 08:53 · last seen 2026-09-15 06:49 · JSON

Last 7 days (3 observations)

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 TTL41+23
Options length0
MSS1420
Window size65535
Window scale6
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_58ed7828516f15
t13d1515h1_8daaf6152771_de4a06bb82e36
t13d1515h1_8daaf6152771_0a20fe35d3a55

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.15
ge11nn13enus_9db22d02e17a_000000000000_0000000000006
ge11nn14enus_4a2973d235de_000000000000_0000000000005

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-8-1-3_1420_626

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.363
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.361
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/107.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 6.3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.190 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 11_1_0) AppleWebKit/537.36 (KHTML, like Gecko) Brave Chrome/89.0.4389.105 Safari/537.361

Country

fingerprintco-occurrences
BR · Brazil15
IQ · Iraq5
IR · Iran1
RS · Serbia1
PA · Panama1
PK · Pakistan1
UZ · Uzbekistan1
NI · Nicaragua1

Network (ASN)

fingerprintco-occurrences
AS203214 · Hulum Almustakbal Company for Communication Engineering and Services Ltd4
AS264072 · ANTONIO G DE SOUSA JUNIOR - ME2
AS267281 · GIGANET TELECOM LTDA-ME2
AS18809 · Cable Onda1
AS9541 · Cyber Internet Services (Pvt) Ltd.1
AS58224 · Iran Telecommunication Company PJS1
AS268837 · J CAVALCANTE DE LIMA INFORMATICA - LTDA1
AS51020 · Al-Jazeera Al-Arabiya Company for Communication and Internet LTD1
AS57016 · Inform-Service TV Ltd.1
AS27742 · Amnet Telecomunicaciones S.A.1