TCP SYN (p0f)

4:53+11:0:1440:65535,8:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-21 09:45 · last seen 2026-09-10 09:51 · JSON

Last 7 days (1 observations)

Distinct clients per day (last 30 days, peak 3/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 TTL53+11
Options length0
MSS1440
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_58ed7828516f7
t13d1515h1_8daaf6152771_0a20fe35d3a56
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.7
ge11nn13enus_9db22d02e17a_000000000000_0000000000007
ge11nn14enus_4a2973d235de_000000000000_0000000000002

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-8-1-3_1440_816

User-Agent

fingerprintco-occurrences
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 (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/104.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/99.0.4844.51 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 (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 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.130 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/101.0.4951.54 Safari/537.361

Country

fingerprintco-occurrences
RU · Russia8
BD · Bangladesh6
PS · Palestinian Territories1
EC · Ecuador1

Network (ASN)

fingerprintco-occurrences
AS12389 · PJSC Rostelecom4
AS135341 · Orange Communication1
AS140962 · IDEA TEC LTD1
AS23688 · Link3 Technologies Ltd.1
AS47253 · BCI Telecommunication & Advanced Technology Company1
AS136598 · HN Telecom Limited1
AS139604 · Arrow Net1
AS133034 · Virtual American Companies (BD) Limited1
AS49732 · Joint Stock Company Tyvasviazinform1
AS8570 · OJSC Lipetskelectrosvyaz1