TLS ClientHello (JA4)

t13d1513h2_8daaf6152771_2abe4cb14537

first seen 2026-09-01 00:03 · last seen 2026-09-01 00:08 · 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

Protocolt (TLS over TCP)
TLS version13
SNId (domain)
Cipher count15
Extension count13
ALPNh2
Ciphers002f, 0035, 009c, 009d, 1301, 1302, 1303, c013, c014, c02b, c02c, c02f, c030, cca8, cca9
Extensions0005, 000a, 000b, 000d, 0015, 0017, 0023, 002b, 002d, 0033, ff01
Signature algorithms0403, 0503, 0603, 0807, 0804, 0401, 0805, 0501, 0806, 0601, 0201, 0203
JA4_rt13d1513h2_002f,0035,009c,009d,1301,1302,1303,c013,c014,c02b,c02c,c02f,c030,cca8,cca9_0005,000a,000b,000d,0015,0017,0023,002b,002d,0033,ff01_0403,0503,0603,0807,0804,0401,0805,0501,0806,0601,0201,0203
JA4_o (sample)t13d1513h2_acb858a92679_8b61d9d47a72
JA4_ro (sample)t13d1513h2_1301,1302,1303,c02b,c02f,c02c,c030,cca9,cca8,c013,c014,009c,009d,002f,0035_002d,0015,0033,0010,0005,0023,000a,000d,ff01,0017,0000,002b,000b_0403,0503,0603,0807,0804,0401,0805,0501,0806,0601,0201,0203

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
ge20nr110000_06a5f95e5d46_000000000000_0000000000002

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:4096;2:1;4:16777216;6:16384|00|0|m,p,a,s2

TCP SYN (p0f)

fingerprintco-occurrences
4:53+11:0:1460:65535,6:mss,sok,ts,nop,ws:df,id+:01
4:114+14:0:1460:65535,8:mss,nop,ws,sok,ts:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-8-1-3_1460_61
65535_2-1-3-4-8_1460_81

User-Agent

fingerprintco-occurrences
ktor-client2

Country

fingerprintco-occurrences
RU · Russia2

Network (ASN)

fingerprintco-occurrences
AS29031 · Lugansk Telephone Company LLC1
AS56420 · JSC ER-Telecom Holding1