TCP SYN (p0f)

4:44+20:0:1452:65535,8:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-19 19:20 · last seen 2026-09-15 05:57 · JSON

Last 7 days (2 observations)

Distinct clients per day (last 30 days, peak 5/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 TTL44+20
Options length0
MSS1452
Window size65535
Window scale8
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_de4a06bb82e313
t13d1515h1_8daaf6152771_0a20fe35d3a511

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.20
ge11nn13enus_9db22d02e17a_000000000000_00000000000017
ge11nn14enus_4a2973d235de_000000000000_0000000000007

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-8-1-3_1452_844

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.75 Safari/537.365
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 Safari/537.364
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 (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/104.0.0.0 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.67 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 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
VN · Vietnam8
BR · Brazil7
ZA · South Africa6
AE · United Arab Emirates5
BO · Bolivia4
UZ · Uzbekistan3
MX · Mexico2
VE · Venezuela2
KH · Cambodia1
HR · Croatia1

Network (ASN)

fingerprintco-occurrences
AS45899 · VNPT Corp5
AS5384 · Emirates Internet5
AS6568 · EMPRESA NACIONAL DE TELECOMUNICACIONES SOCIEDAD ANONIMA4
AS328471 · HERO TELECOMS (PTY) LTD3
AS18403 · FPT Telecom Company2
AS174 · Cogent Communications, LLC1
AS7552 · Viettel Group1
AS12400 · Partner Communications Ltd.1
AS27699 · TELEFÔNICA BRASIL S.A1
AS20011 · Dimension Data1