TCP SYN (p0f)

6:48+16:0:1440:mss*45,8:mss,nop,ws,nop,nop,sok:flow:0

first seen 2026-06-27 10:27 · last seen 2026-09-15 02:32 · JSON

Last 7 days (2 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 version6
Initial TTL48+16
Options length0
MSS1440
Window sizemss*45
Window scale8
Options layoutmss,nop,ws,nop,nop,sok
Quirksflow
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
t13d1517h2_8daaf6152771_dcad5a05399153
t13d1717h2_5b57614c22b0_3cbfd9057e0d Match?Exact match in Thumbprint's published controlled catalog captures: firefox 148.0.2, firefox 144.0.2, firefox 142.0.1, +6 more.The fingerprint page shows the full measured match list. More on the catalog.2
t13d2012h1_2b729b4bf6f3_9e7b989ebec82

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr04enus_a1e84a948d10_000000000000_00000000000030
ge20nr05enus_13668fa4568b_000000000000_00000000000022
ge11nn030000_fe444ad14866_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.16.0.The fingerprint page shows the full measured match list. More on the catalog.2
ge20nr05enus_3689cb9ca913_000000000000_0000000000001
ge20nn12enus_984363e56bcf_000000000000_0000000000001
ge20nn13enus_9e2b86631664_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.27
1:65536;2:0;4:6291456;6:262144|15663105|9:1:0:256|m,a,s,p2
1:65536;2:0;4:6291456;6:262144|15663105|3:1:0:256|m,a,s,p2
1:65536;2:0;4:6291456;6:262144|15663105|13:1:0:256|m,a,s,p2
1:65536;2:0;4:6291456;6:262144|15663105|7:1:0:256|m,a,s,p2
1:65536;2:0;4:6291456;6:262144|15663105|15:1:0:256|m,a,s,p2
1:65536;2:0;4:6291456;6:262144|15663105|11:1:0:256|m,a,s,p2
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:42|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 152.0.5, firefox 152.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.2
1:65536;2:0;4:6291456;6:262144|15663105|17:1:0:256|m,a,s,p2
1:65536;2:0;4:6291456;6:262144|15663105|19:1:0:256|m,a,s,p2

TCP SYN (JA4T)

fingerprintco-occurrences
64800_2-1-3-1-1-4_1440_834

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/149.0.0.0 Safari/537.3649
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.363
curl/8.7.12
Go-http-client/2.01
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:147.0) Gecko/20100101 Firefox/147.01
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:135.0) Gecko/20100101 Firefox/135.01

Country

fingerprintco-occurrences
PH · Philippines55
JP · Japan2

Network (ASN)

fingerprintco-occurrences
AS9299 · Philippine Long Distance Telephone Company55
AS2516 · KDDI CORPORATION2