TCP SYN (p0f)

4:55+9:0:1460:mss*29,10:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-01 14:41 · last seen 2026-10-23 22:14 · 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 TTL55+9
Options length0
MSS1460
Window sizemss*29
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
t13i1909h2_9dc949149365_97f8aa674fd93
t13d5911h1_a33745022dd6_1f22a2ca17c4 Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 23.11.1.The fingerprint page shows the full measured match list. More on the catalog.1
t13d3013h2_1d37bd780c83_8537cf56674e1
t13d1515h1_8daaf6152771_0a20fe35d3a51
t13d311000_e8f1e7e78f70_e1d1bdc3e2a21

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr030000_80b089f68b8e_000000000000_0000000000003
ge11nn13enus_9db22d02e17a_000000000000_0000000000001
ge11nn07enus_6c5989145a61_000000000000_0000000000001
ge11nn05en00_978ba9f30f5e_000000000000_0000000000001
ge20nn030000_bf75ddd0bb29_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 1.26.10, go-net/http 1.26.9, +8 more.The fingerprint page shows the full measured match list. More on the catalog.3
3:100;4:65536;2:0|1048510465|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.13.0, curl 8.18.0, curl 8.21.0, +8 more.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (JA4T)

fingerprintco-occurrences
42340_2-4-8-1-3_1460_107

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (compatible; CyberConvoyScout/1.0; +https://scout.cyberconvoy.co)3
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.361
curl/8.14.11
Mozilla/5.0 (compatible; IdeaVault/1.0; +https://huaidj.club)1
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/142.0.0.0 Safari/537.36 Edg/120.0.0.01

Country

fingerprintco-occurrences
US · United States3
SG · Singapore2
AU · Australia1
FI · Finland1

Network (ASN)

fingerprintco-occurrences
AS20473 · The Constant Company, LLC6
AS202147 · VPSUS LTD1

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,001e,0018,0019,0100,0101 Match?Exact match in Thumbprint's published controlled catalog captures: node-fetch 24.22.1, python-httpx 0.28.1, python-requests 2.34.2, +2 more.The fingerprint page shows the full measured match list. More on the catalog.1