TCP SYN (p0f)

4:49+15:0:1460:mss*29,12:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-29 15:43 · last seen 2026-09-04 07:06 · JSON

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 TTL49+15
Options length0
MSS1460
Window sizemss*29
Window scale12
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
t13d1011h2_18ef40b21276_879711aa9f169
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.2

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn14enus_068ebe3632ec_000000000000_0000000000009
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 5.1.26100.32995.The fingerprint page shows the full measured match list. More on the catalog.1
ge11nn020000_857df39a0de2_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
0|00|0|m,s,a,p9

TCP SYN (JA4T)

fingerprintco-occurrences
42340_2-4-8-1-3_1460_1210

User-Agent

fingerprintco-occurrences
curl/8.7.19
fasthttp1

Country

fingerprintco-occurrences
FR · France9
NL · Netherlands2

Network (ASN)

fingerprintco-occurrences
AS211590 · Bucklog SARL9
AS48090 · TECHOFF SRV LIMITED2