TCP SYN (p0f)

4:42+22:0:1400:65535,9:mss,sok,nop,nop,nop,nop,nop,nop,nop,nop,nop,nop,nop,ws:df,id+:0

first seen 2026-07-29 23:01 · last seen 2026-09-04 18:33 · JSON

Distinct clients per day (last 30 days, peak 1/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 TTL42+22
Options length0
MSS1400
Window size65535
Window scale9
Options layoutmss,sok,nop,nop,nop,nop,nop,nop,nop,nop,nop,nop,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_58ed7828516f1
t13d1515h1_8daaf6152771_de4a06bb82e31

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.1
ge11nn13enus_9db22d02e17a_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-1-1-1-1-1-1-1-1-1-1-1-3_1400_92

User-Agent

fingerprintco-occurrences
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 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.150 Safari/537.361

Country

fingerprintco-occurrences
BD · Bangladesh2

Network (ASN)

fingerprintco-occurrences
AS24389 · GrameenPhone Ltd.2