TCP SYN (p0f)

4:51+13:0:1460:65535,11:mss,sok,ts,nop,ws:df,id+:0

first seen 2026-07-14 19:30 · last seen 2026-10-23 22:05 · 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 TTL51+13
Options length0
MSS1460
Window size65535
Window scale11
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
t13d2014h2_a09f3c656075_e42f34c56612 Match?Exact match in Thumbprint's published controlled catalog captures: safari 26.5.2, safari 26.5, safari 26.6.1, +1 more.The fingerprint page shows the full measured match list. More on the catalog.10
t13d3013h2_1d37bd780c83_8537cf56674e2

HTTP request (JA4H)

fingerprintco-occurrences
ge20nr07zhcn_0195bc40dc9f_000000000000_0000000000004
ge20nn030000_bf75ddd0bb29_000000000000_0000000000002
ge20nr08zhcn_0a5873f4dd2b_000000000000_0000000000002
ge20nn05zhcn_0f1b229de16a_000000000000_0000000000002
ge20nr07zhcn_f7b11b6a6047_000000000000_0000000000001
ge20nr07zhcn_39faa4ed05e7_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:2097152;3:100|10485760|0|m,s,p,a4
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.2
2:0;4:2097152;3:100|10485760|1:0:0:255|m,s,p,a2
2:0;4:2097152;3:100|10485760|7:0:0:255|m,s,p,a1
2:0;4:2097152;3:100|10485760|9:0:0:255|m,s,p,a1
2:0;4:2097152;3:100|10485760|11:0:0:255|m,s,p,a1
2:0;4:2097152;3:100|10485760|13:0:0:255|m,s,p,a1

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-8-1-3_1460_1112

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (iPhone; CPU iPhone OS 18_3_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/150.0.7871.113 Mobile/15E148 Safari/604.18
curl/8.14.12
Shadowrocket/3378 CFNetwork/3826.400.120 Darwin/24.3.0 iPhone16,12

Country

fingerprintco-occurrences
HK · Hong Kong SAR China10
NL · Netherlands2

Network (ASN)

fingerprintco-occurrences
AS23961 · Misaka Network, Inc.10
AS47172 · Greenhost BV2

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.2