TCP SYN (p0f)

4:50+14:0:1460:mss*29,11:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-19 22:17 · last seen 2026-09-16 11:30 · JSON

Last 7 days (20 observations)

Distinct clients per day (last 30 days, peak 17/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 TTL50+14
Options length0
MSS1460
Window sizemss*29
Window scale11
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
t13d1312h1_f57a46bbacb6_ab7e3b40a67717
t13d131100_f57a46bbacb6_ab7e3b40a677 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.5, go-net/http 1.26.4.The fingerprint page shows the full measured match list. More on the catalog.4
t13d1512h2_8daaf6152771_cbb9361b6bf94
t13d151100_8daaf6152771_882d495ac3813
t13d0711h2_09f1d95ec63b_9ced094328c91
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.1
t13d1012h2_351564fbf23c_cbb9361b6bf91
t13d0711h2_46c26c6691b6_9ced094328c91
t13d0711h2_d48a1a640bc0_9ced094328c91
t13d0710h2_6d946386f259_5603904660151

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn04enus_989c7cc05c9b_000000000000_00000000000027
ge11nr030000_cd680697de12_000000000000_0000000000003
ge11nr09enus_013f2e8c24e3_000000000000_0000000000002
ge11nr090000_ca88a1a82d6a_000000000000_0000000000002
ge11nr050000_6671ba49f1e0_000000000000_0000000000002
ge11nr060000_48452b10c019_000000000000_0000000000002
ge11nr070000_63605f79051a_000000000000_0000000000002
ge11nr120000_793e633f1402_000000000000_0000000000002
ge11nr150000_3985b49a45e4_000000000000_0000000000002
ge11nr080000_b3681babee5f_000000000000_0000000000002

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144;4:1048576|15663105|1:0:0:256|m,a,s,p27
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.1
1:65536;2:0;3:1000;4:6291456;6:262144|15663105|1:1:0:256|m,a,s,p1
1:65536;2:0;4:131072;5:16384|12517377|1:0:0:42|m,p,a,s1

TCP SYN (JA4T)

fingerprintco-occurrences
42340_2-4-8-1-3_1460_1150

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.3614
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/148.0.0.0 Safari/537.363
Mozilla/5.0 (Windows NT 10.0; Win64; x64) Chrome/120.0.0.02
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.7 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.4 Safari/537.362
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.5 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.1 Safari/537.362
WordPress/6.4.32
Mozilla/5.01
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
DE · Germany33
NL · Netherlands21

Network (ASN)

fingerprintco-occurrences
AS60729 · Stiftung Erneuerbare Freiheit30
AS48090 · TECHOFF SRV LIMITED20
AS197540 · netcup GmbH3
AS197170 · TechTies Inc.1