TCP SYN (p0f)

4:120+8:0:1460:65535,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:0

first seen 2026-07-08 18:12 · last seen 2026-09-16 08:15 · JSON

Last 7 days (11 observations)

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 TTL120+8
Options length0
MSS1460
Window size65535
Window scale8
Options layoutmss,nop,ws,nop,nop,sok
Quirksdf,id+,ecn
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
t13d1312h2_f57a46bbacb6_ab7e3b40a677 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, +5 more.The fingerprint page shows the full measured match list. More on the catalog.13
t13d1812h1_85036bcba153_d41ae481755e3
t13d181000_e8a523a41297_78e6aca7449b2
t12d190800_d83cc789557e_16bbda4055b21
t13d201000_2b729b4bf6f3_29829a46703f1

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr020000_b89ce445e0b3_000000000000_00000000000013
ge11nn07enus_1602cc5cc04c_000000000000_0000000000003
ge11nn040000_487c3246ac94_000000000000_0000000000002
ge11nn040000_cabeb744284e_000000000000_0000000000001
ge11nn020000_818f42cc3fd7_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: php-guzzle 8.1.0, php-guzzle 8.2.0, php-guzzle 8.0.2, +7 more.The fingerprint page shows the full measured match list. More on the catalog.1

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.13

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-1-1-4_1460_820

User-Agent

fingerprintco-occurrences
Go-http-client/2.013
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/115.0.0.0 Safari/537.36 Edg/115.0.1901.2032
Mozilla/5.0 (iPhone; CPU iPhone OS 17_5 like Mac OS X) Mobile/15E148 Safari/604.12
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:126.0) Gecko/20100101 Firefox/126.01

Country

fingerprintco-occurrences
SG · Singapore16
US · United States2
NL · Netherlands1
GB · United Kingdom1

Network (ASN)

fingerprintco-occurrences
AS31898 · Oracle Corporation16
AS203861 · Miteflux Technologies Ltd2
AS25369 · Hydra Communications Ltd1
AS401626 · Netiface America, Inc.1