TCP SYN (p0f)

4:51+13:0:1460:mss*29,12:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-15 11:04 · last seen 2026-09-15 15:41 · JSON

Last 7 days (4 observations)

Distinct clients per day (last 30 days, peak 2/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
MSS1460
Window sizemss*29
Window scale12
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
t13d1011h2_18ef40b21276_879711aa9f1615
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, +24 more.The fingerprint page shows the full measured match list. More on the catalog.4
t13d1516h1_8daaf6152771_1a63afa7c4781

HTTP request (JA4H)

fingerprintco-occurrences
po20nn15enus_6175c8d80ef7_000000000000_0000000000005
po20nn23enus_91c53b5c6d06_000000000000_0000000000005
po20nn15enus_bef4d4356c13_000000000000_0000000000005
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, +23 more.The fingerprint page shows the full measured match list. More on the catalog.4
ge11nn13enus_9db22d02e17a_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
0|00|0|m,s,a,p15
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.4

TCP SYN (JA4T)

fingerprintco-occurrences
42340_2-4-8-1-3_1460_125

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.3610
curl/8.7.15
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.364
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

Country

fingerprintco-occurrences
FR · France19
US · United States1

Network (ASN)

fingerprintco-occurrences
AS211590 · Bucklog SARL15
AS203020 · HostRoyale Technologies Pvt Ltd4
AS9009 · M247 Europe SRL1