TCP SYN (p0f)

4:111+17:0:1440:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:0

first seen 2026-06-18 18:17 · last seen 2026-08-29 01:20 · 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 TTL111+17
Options length0
MSS1440
Window sizemss*44
Window scale8
Options layoutmss,nop,ws,nop,nop,sok
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
t13d1516h2_8daaf6152771_d8a2da3f94cd Match?Exact match in Thumbprint's published controlled catalog captures: chromium 149.0.7827.102, chrome 149.0.7827.102, chrome 149.0.7827.156, +25 more.The fingerprint page shows the full measured match list. More on the catalog.3
t13d2212h2_231e334592e8_36bf25f296df2
t12d190800_d83cc789557e_7af1ed941c261

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr16arso_94fdc06e0694_000000000000_0000000000002
ge20nn070000_0db4b1d092fe_000000000000_0000000000001
ge20nn070000_2929a239426f_000000000000_0000000000001
po11nn07enus_7d361e250c48_000000000000_0000000000001
ge20nn16arso_94fdc06e0694_000000000000_0000000000001

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, +43 more.The fingerprint page shows the full measured match list. More on the catalog.3
2:0;4:65535|67043329|0|m,s,a,p2

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-1-3-1-1-4_1440_84

User-Agent

fingerprintco-occurrences
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm) Chrome/116.0.1938.76 Safari/537.362
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.362
Mozilla/5.0 (Linux; Android 10; x86) AppleWebKit/537.36 (KHTML, like Gecko) Safari/15.0.0.0 Safari/537.361
Mozilla/5.0 (Linux; Android 13; Redmi Note 12) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Mobile Safari/537.361

Country

fingerprintco-occurrences
BD · Bangladesh3
US · United States2
BJ · Benin1

Network (ASN)

fingerprintco-occurrences
AS8075 · Microsoft Corporation2
AS151820 · Max Speed2
AS23956 · AmberIT Limited1
AS37090 · ISOCEL SA1