TCP SYN (p0f)

4:45+19:0:1412:65535,9:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-24 06:26 · last seen 2026-09-03 14:10 · JSON

Distinct clients per day (last 30 days, peak 2/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 TTL45+19
Options length0
MSS1412
Window size65535
Window scale9
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_58ed7828516f3
t13d1515h1_8daaf6152771_0a20fe35d3a53
t13d431200_c7886603b240_d339722ba4af1

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.4
ge11nn14enus_4a2973d235de_000000000000_0000000000002
ge11nn13enus_9db22d02e17a_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-8-1-3_1412_97

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 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/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4886.148 Safari/537.361
Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.83 Safari/537.361
Ubuntu-Python38-JA4T-Probe/1.01

Country

fingerprintco-occurrences
ZA · South Africa2
RO · Romania1
CN · China1
BN · Brunei1
CG · Congo - Brazzaville1
EC · Ecuador1

Network (ASN)

fingerprintco-occurrences
AS8708 · DIGI ROMANIA S.A.1
AS37611 · AFRIHOST SP (PTY) LTD1
AS37963 · Hangzhou Alibaba Advertising Co.,Ltd.1
AS10094 · Unified National Networks1
AS52468 · UFINET PANAMA S.A.1
AS37049 · SADV (Pty) Ltd1
AS37451 · CONGO TELECOM1