TCP SYN (p0f)

4:49+15:0:1460:mss*20,7:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-06-11 03:20 · last seen 2026-09-04 03:15 · 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 sizemss*20
Window scale7
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
t13i1909h2_9dc949149365_97f8aa674fd91
t12d860700_e18388e7f3a3_4446390ac2241
t13d251100_b78ed14e2fd0_ab7e3b40a6771

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr040000_88d30a62b7ad_000000000000_0000000000001
ge11nn050000_ea6f06182064_000000000000_0000000000001
ge11nn050000_57c5e92682a8_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
29200_2-4-8-1-3_1460_72

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.5005.63 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.0.0 Safari/537.361

Country

fingerprintco-occurrences
US · United States1
IT · Italy1
NL · Netherlands1

Network (ASN)

fingerprintco-occurrences
AS14061 · DigitalOcean, LLC2
AS31034 · Aruba S.p.A.1