TLS ClientHello (JA4)

t13d0811h2_5c6a7162aef5_b11bb3600f94

first seen 2026-08-18 09:42 · last seen 2026-10-10 11:52 · 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

Protocolt (TLS over TCP)
TLS version13
SNId (domain)
Cipher count8
Extension count11
ALPNh2
Ciphers1301, 1302, 1303, c014, c02c, c02f, cca8, cca9
Extensions000a, 000b, 000d, 0015, 0017, 002b, 002d, 0033, ff01
Signature algorithms0403, 0804, 0401, 0503, 0805, 0501, 0806, 0601
JA4_rt13d0811h2_1301,1302,1303,c014,c02c,c02f,cca8,cca9_000a,000b,000d,0015,0017,002b,002d,0033,ff01_0403,0804,0401,0503,0805,0501,0806,0601
JA4_o (sample)t13d0811h2_08a5dd92a95d_088a667a3f0b
JA4_ro (sample)t13d0811h2_1301,1302,1303,cca8,c02f,c02c,cca9,c014_002d,ff01,0000,0033,000b,0010,000d,000a,002b,0017,0015_0403,0804,0401,0503,0805,0501,0806,0601

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.

HTTP request (JA4H)

fingerprintco-occurrences
ge20nn04enus_989c7cc05c9b_000000000000_0000000000002

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144;4:1048576|15663105|1:0:0:256|m,a,s,p2

TCP SYN (p0f)

fingerprintco-occurrences
4:53+11:0:1460:mss*29,11:mss,sok,ts,nop,ws:df,id+:01
4:46+18:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_71
42340_2-4-8-1-3_1460_111

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.6312.7 Safari/537.362

Country

fingerprintco-occurrences
DE · Germany1
SE · Sweden1

Network (ASN)

fingerprintco-occurrences
AS198093 · Foreningen for digitala fri- och rattigheter1
AS197540 · netcup GmbH1