TCP SYN (p0f)

4:49+15:0:1460:62727,10:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-03 11:29 · last seen 2026-09-06 02:05 · 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 TTL49+15
Options length0
MSS1460
Window size62727
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
t13d3112h1_e8f1e7e78f70_d41ae481755e1
t13d1311h2_f57a46bbacb6_e7c285222651 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.23.12, go-net/http 1.24.13.The fingerprint page shows the full measured match list. More on the catalog.1
t13d3013h1_1d37bd780c83_8537cf56674e1

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn05enus_eeed6042a2dd_000000000000_0000000000001
ge11nn050000_be0d0b335e46_000000000000_0000000000001
ge11nn060000_5fa1d83f11c0_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:4194304;5:16384;6:10485760|1073741824|0|a,m,p,s Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.8, go-net/http 1.26.7, +6 more.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (JA4T)

fingerprintco-occurrences
62727_2-4-8-1-3_1460_103

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.361
overseas-product-finder/0.1 (research; contact: you@example.com)1
BlackHatTeam/@mrzblackhat (Mozilla/5.0; compatible; PageBuilderCK-Scanner/1.0)1

Country

fingerprintco-occurrences
DE · Germany1
JP · Japan1
IE · Ireland1

Network (ASN)

fingerprintco-occurrences
AS16509 · Amazon.com, Inc.3