TCP SYN (p0f)

4:45+19:0:1360:mss*48,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-08-20 17:22 · last seen 2026-10-29 12:31 · JSON

Last 7 days (2 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 TTL45+19
Options length0
MSS1360
Window sizemss*48
Window scale7
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
t13d1717h2_5b57614c22b0_05692a3430783
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.2
t13d521100_b262b3658495_8e6e362c5eac2
t13d1516h2_8daaf6152771_afc95f72a2952

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn11enus_3901d4197baf_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 152.0.5, firefox 153.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.3
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, +36 more.The fingerprint page shows the full measured match list. More on the catalog.2
ge11nn030000_b0d6a43aa599_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: powershell 5.1.26100.33296, powershell 5.1.26100.33158, powershell 5.1.26100.33438, +3 more.The fingerprint page shows the full measured match list. More on the catalog.2
ge20nr13enus_c66457727412_000000000000_0000000000002

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:131072;5:16384;6:16384|12451842|0|m,a,s,p3
2:0;4:6291456;5:16384;6:262144|15597570|0|m,a,s,p2
1:65536;2:0;4:6291456;6:262144|15663105|3:1:0:220|m,a,s,p Match?Exact match in Thumbprint's published controlled catalog captures: chromium 151.0.7922.34, chromium 147.0.7727.15, chromium 145.0.7632.6, +26 more.The fingerprint page shows the full measured match list. More on the catalog.1
1:65536;2:0;4:6291456;6:262144|15663105|5:1:3:220|m,a,s,p1

TCP SYN (JA4T)

fingerprintco-occurrences
65280_2-4-8-1-3_1360_79

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:144.0) Gecko/20100101 Firefox/144.03
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/48.0.2232.1802 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.6496.1167 Safari/537.361

Country

fingerprintco-occurrences
DE · Germany9

Network (ASN)

fingerprintco-occurrences
AS24940 · Hetzner Online GmbH9

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,0018,0019,0100,01013
11ec,001d,0017,001e,0018,0019,0100,0101 Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.22.1, python-httpx 0.28.1, python-requests 2.34.2, +2 more.The fingerprint page shows the full measured match list. More on the catalog.1