TCP SYN (p0f)

4:44+20:0:1452:65535,5:mss,nop,ws,nop,nop,ts,sok,eol+1:df:0

first seen 2026-09-06 11:53 · last seen 2026-09-14 17:26 · JSON

Last 7 days (1 observations)

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 TTL44+20
Options length0
MSS1452
Window size65535
Window scale5
Options layoutmss,nop,ws,nop,nop,ts,sok,eol+1
Quirksdf
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
t13d311000_e8f1e7e78f70_a29327ec888c1
t13d4312h1_c7886603b240_b26ce05bbdd61

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn06en00_0a33f8df75b5_000000000000_0000000000001
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

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-1-1-8-4-0-0_1452_52

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/536.2 (KHTML, like Gecko) Chrome/26.0.870.0 Safari/536.21
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
VN · Vietnam2

Network (ASN)

fingerprintco-occurrences
AS18403 · FPT Telecom Company2