TLS ClientHello (JA4)

t13d1311h2_ec6548260de5_9ced094328c9

first seen 2026-08-18 01:48 · last seen 2026-10-11 03:30 · 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 count13
Extension count11
ALPNh2
Ciphers0035, 009c, 009d, 1301, 1302, 1303, c013, c014, c02b, c02c, c02f, c030, cca9
Extensions000a, 000b, 000d, 0017, 0023, 002b, 002d, 0033, ff01
Signature algorithms0403, 0804, 0401, 0503, 0805, 0501, 0806, 0601
JA4_rt13d1311h2_0035,009c,009d,1301,1302,1303,c013,c014,c02b,c02c,c02f,c030,cca9_000a,000b,000d,0017,0023,002b,002d,0033,ff01_0403,0804,0401,0503,0805,0501,0806,0601
JA4_o (sample)t13d1311h2_fafcfe6aac21_7bb6ae157656
JA4_ro (sample)t13d1311h2_1301,1302,1303,c02f,cca9,0035,009d,c013,c030,c014,c02c,c02b,009c_0023,000d,000a,ff01,0017,0000,0033,0010,000b,002d,002b_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*44,11:mss,sok,ts,nop,ws:df,id+:01
4:52+12:0:8960:mss*7,7:mss,sok,ts,nop,ws:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_111
62720_2-4-8-1-3_8960_71

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.4 Safari/537.361
Mozilla/5.0 (X11; CrOS x86_64 14541.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.3 Safari/537.361

Country

fingerprintco-occurrences
NO · Norway1
FR · France1

Network (ASN)

fingerprintco-occurrences
AS56655 · Gigahost AS1
AS213873 · OUIDO Hosting1