TCP SYN (p0f)

4:58+6:0:1460:65535,9:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-01 14:36 · last seen 2026-09-04 08:02 · 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 TTL58+6
Options length0
MSS1460
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_0a20fe35d3a52
t12d220700_0d4ca5d4ec72_3304d83680431
t13d311100_e8f1e7e78f70_b14c9c0b50321
t13d2013h2_a09f3c656075_7f0f34a4126d Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.4, safari 26.6.2, +2 more.The fingerprint page shows the full measured match list. More on the catalog.1
t13d311100_e8f1e7e78f70_24695f2957a71

HTTP request (JA4H)

fingerprintco-occurrences
ge11nn06enus_6a79d837b13a_000000000000_0000000000001
ge11nn070000_6246225f8e38_000000000000_0000000000001
ge20nn05enus_3f99bc624e90_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: urlsession 6.3.2, urlsession 6.3.3.The fingerprint page shows the full measured match list. More on the catalog.1
ge11nn12enus_dee490167315_000000000000_0000000000001
ge11nn14enus_4a2973d235de_000000000000_0000000000001
ge11nn13enus_9db22d02e17a_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:2097152;3:100;9:1|10485760|0|m,s,p,a1

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-8-1-3_1460_96

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 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 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:126.0) Gecko/20100101 Firefox/126.01
com.apple.AuthenticationServicesCore.AuthenticationServicesAgent/8624.2.5.10.8 CFNetwork/3860.600.12 Darwin/25.5.01

Country

fingerprintco-occurrences
US · United States5
SE · Sweden1

Network (ASN)

fingerprintco-occurrences
AS141039 · PacketHub S.A.3
AS54113 · Fastly, Inc.2
AS212238 · Datacamp Limited1