TCP SYN (p0f)

4:57+7:0:1420:mss*46,10:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-27 14:17 · last seen 2026-09-05 20:44 · 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 TTL57+7
Options length0
MSS1420
Window sizemss*46
Window scale10
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.4
t13d1011h1_61a7ad8aa9b6_3a8073edd8ef1

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr030000_cd680697de12_000000000000_0000000000002
ge11nr030000_0db47b7d240d_000000000000_0000000000002
ge11nr030000_341eb0d8946c_000000000000_0000000000001

TCP SYN (JA4T)

fingerprintco-occurrences
65320_2-4-8-1-3_1420_103

User-Agent

fingerprintco-occurrences
Go-http-client/1.14
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0 Safari/537.361

Country

fingerprintco-occurrences
KR · South Korea2
IN · India2
US · United States1

Network (ASN)

fingerprintco-occurrences
AS396982 · Google LLC5