TCP SYN (p0f)

4:51+13:0:1360:65535,8:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-24 05:05 · last seen 2026-10-27 17:00 · 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 TTL51+13
Options length0
MSS1360
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
t13d1515h1_8daaf6152771_0a20fe35d3a52
t13d4412h1_fd39b124ee10_58ed7828516f2
t13d4312h1_c7886603b240_b26ce05bbdd61
t13d2014h2_a09f3c656075_14788d8d241b1

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.3
ge11nn13enus_9db22d02e17a_000000000000_0000000000001
ge11nn14enus_4a2973d235de_000000000000_0000000000001
ge20nn07enus_39faa4ed05e7_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
4:2097152;3:100|10485760|1:0:0:255|m,s,p,a1

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-8-1-3_1360_86

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/537.361
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_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.131 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.779 Safari/537.361
Mozilla/5.0 (iPhone; CPU iPhone OS 16_7_16 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.6.2 Mobile/15E148 Safari/604.11

Country

fingerprintco-occurrences
UA · Ukraine2
US · United States1
BR · Brazil1
CN · China1
NP · Nepal1

Network (ASN)

fingerprintco-occurrences
AS15895 · "Kyivstar" PJSC2
AS4134 · CHINANET BACKBONE1
AS28573 · Claro NXT Telecomunicacoes Ltda1
AS23752 · Nepal Telecommunications Corporation, Internet Services,1
AS32307 · NE COLORADO CELLULAR INC1

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.1