TCP SYN (p0f)

4:48+16:0:1460:mss*44,9:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-11 00:00 · last seen 2026-09-16 14:12 · JSON

Last 7 days (9 observations)

Distinct clients per day (last 30 days, peak 4/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 TTL48+16
Options length0
MSS1460
Window sizemss*44
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
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.20
t13d131100_f57a46bbacb6_e5728521abd419
t13i131000_f57a46bbacb6_ab7e3b40a6771
t13d1516h2_8daaf6152771_02713d6af862 Match?Exact match in Thumbprint's published controlled catalog captures: chromium 131.0.6778.33, chromium 134.0.6998.35, chromium 133.0.6943.16.The fingerprint page shows the full measured match list. More on the catalog.1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr07enus_b23b8373b424_000000000000_00000000000036
ge11nr030000_fe444ad14866_000000000000_0000000000002
ge11nn07enus_d245cb95f2c3_000000000000_0000000000001
ge20nn04enus_39a3ba4480e8_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: urlsession 6.1.2.The fingerprint page shows the full measured match list. More on the catalog.1
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.1

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:4194304;6:10485760|1073741824|0|a,m,p,s Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13, go-net/http 1.23.12.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_940

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.37
Mozilla/5.0 (Linux; Android 14; SM-S901B) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.6099.280 Mobile Safari/537.36 OPR/80.4.4244.77865
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36 Agency/93.8.2357.55
Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:109.0) Gecko/20100101 Firefox/1154
Mozilla/5.0 (Linux; Android 12; SAMSUNG SM-A415F) AppleWebKit/537.36 (KHTML, like Gecko) SamsungBrowser/23.0 Chrome/115.0.0.0 Mobile Safari/537.34
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.363
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:123.0) Gecko/20100101 Firefox/1233
Mozilla/5.0 (Linux; U; Android 13; sk-sk; Xiaomi 11T Pro Build/TKQ1.220829.002) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/112.0.5615.136 Mobile Safari/537.36 XiaoMi/MiuiBrowser/14.4.0-g3
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.32
Mozilla/5.0 (X11; U; Linux x86_64; en-US) AppleWebKit/534.10 (KHTML, like Gecko) Chrome/8.0.552.200 Safari/534.101

Country

fingerprintco-occurrences
SE · Sweden36
US · United States3
DE · Germany1
UA · Ukraine1

Network (ASN)

fingerprintco-occurrences
AS51747 · Internet Vikings International AB17
AS42708 · Glesys AB10
AS12552 · GlobalConnect AB5
AS204770 · UAB "Cherry Servers"3
AS16312 · Internet Vikings International AB3
AS208137 · Feo Prest SRL1
AS6698 · Virtual Systems LLC1
AS51913 · Internet Vikings International AB1