TCP SYN (p0f)

4:43+21:0:1400:65535,6:mss,sok,ts,nop,ws::0

first seen 2026-07-25 15:40 · last seen 2026-10-22 20:07 · 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 TTL43+21
Options length0
MSS1400
Window size65535
Window scale6
Options layoutmss,sok,ts,nop,ws
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
t13d4312h1_c7886603b240_b26ce05bbdd62
t13d4412h1_fd39b124ee10_58ed7828516f2
t13d1515h1_8daaf6152771_0a20fe35d3a51
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.4
ge11nn13enus_9db22d02e17a_000000000000_0000000000001
ge11nn14enus_4a2973d235de_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-8-1-3_1400_66

User-Agent

fingerprintco-occurrences
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/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 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 11_0_0) AppleWebKit/537.36 (KHTML, like Gecko) Brave Chrome/86.0.4240.183 Safari/537.361

Country

fingerprintco-occurrences
MY · Malaysia1
BD · Bangladesh1
SA · Saudi Arabia1
NG · Nigeria1
JO · Jordan1
UZ · Uzbekistan1

Network (ASN)

fingerprintco-occurrences
AS35819 · Etihad Etisalat, a joint stock company1
AS49273 · COSCOM Liability Limited Company1
AS48832 · Jordanian mobile phone services Ltd1
AS29465 · MTN NIGERIA Communication limited1
AS24432 · TM International Bangladesh Ltd.Internet service Provider,Gulshan-1,Dhaka-12121
AS38466 · U Mobile Sdn Bhd1

TLS supported groups

fingerprintco-occurrences
001d,0017,001e,0019,0018,0100,0101,0102,0103,0104 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, php-guzzle 8.3.1, curl 7.88.1, +10 more.The fingerprint page shows the full measured match list. More on the catalog.2