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 2026-10-30 17:34 · 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 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
t13d1515h1_8daaf6152771_0a20fe35d3a53
t13d1516h2_8daaf6152771_806a8c22fdea Match?Exact match in Thumbprint's published controlled catalog captures: chrome 150.0.7871.187, chrome 151.0.7922.137, chromium 151.0.7922.34, +28 more.The fingerprint page shows the full measured match list. More on the catalog.3
t13d4412h1_fd39b124ee10_58ed7828516f3
t13d1515h1_8daaf6152771_de4a06bb82e31
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
ge20nn13enus_0c2c1d640f3e_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 151.0.7922.137, chrome 151.0.7922.170, chrome 151.0.7922.108, +39 more.The fingerprint page shows the full measured match list. More on the catalog.3
ge11nn13enus_9db22d02e17a_000000000000_0000000000002
ge11nn14enus_4a2973d235de_000000000000_0000000000002

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 151.0.7922.34, chrome 151.0.7922.137, +60 more.The fingerprint page shows the full measured match list. More on the catalog.3

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-8-1-3_1412_911

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.363
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 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 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
CN · China2
ZA · South Africa2
RO · Romania1
MX · Mexico1
KE · Kenya1
BN · Brunei1
VE · Venezuela1
CG · Congo - Brazzaville1
EC · Ecuador1

Network (ASN)

fingerprintco-occurrences
AS4134 · CHINANET BACKBONE1
AS8708 · DIGI ROMANIA S.A.1
AS37611 · AFRIHOST SP (PTY) LTD1
AS37963 · Hangzhou Alibaba Advertising Co.,Ltd.1
AS13999 · Mega Cable, S.A. de C.V.1
AS10094 · Unified National Networks1
AS52468 · UFINET PANAMA S.A.1
AS15399 · Wananchi Group (Kenya) Limited1
AS8048 · CANTV Servicios, Venezuela1
AS37049 · SADV (Pty) Ltd1

TLS supported groups

fingerprintco-occurrences
0a0a,11ec,001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 156.0.8078.48, edge 155.0.4283.62, chrome 156.0.8078.47, +11 more.The fingerprint page shows the full measured match list. More on the catalog.1