TLS ClientHello (JA4)

t13d1310h2_21b40303e110_560390466015

first seen 2026-07-24 09:38 · last seen 2026-08-18 06:03 · 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

Protocol	`t (TLS over TCP)`
TLS version	`13`
SNI	`d (domain)`
Cipher count	`13`
Extension count	`10`
ALPN	`h2`
Ciphers	`0035, 009c, 009d, 1301, 1302, 1303, c013, c014, c02b, c02c, c02f, cca8, cca9`
Extensions	`000a, 000b, 000d, 0017, 002b, 002d, 0033, ff01`
Signature algorithms	`0403, 0804, 0401, 0503, 0805, 0501, 0806, 0601`
JA4_r	`t13d1310h2_0035,009c,009d,1301,1302,1303,c013,c014,c02b,c02c,c02f,cca8,cca9_000a,000b,000d,0017,002b,002d,0033,ff01_0403,0804,0401,0503,0805,0501,0806,0601`
JA4_o (sample)	`t13d1310h2_204732dc6c1a_ae9be2486866`
JA4_ro (sample)	`t13d1310h2_1301,1302,1303,0035,009d,cca8,c013,c02c,cca9,c02b,c02f,c014,009c_000a,0000,002d,002b,0010,0033,0017,ff01,000d,000b_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)

fingerprint	co-occurrences
`ge20nn04enus_989c7cc05c9b_000000000000_000000000000`	2
`ge20nn010000_379fadc6c8b7_000000000000_000000000000`	1

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`1:65536;2:0;4:6291456;6:262144;4:1048576\|15663105\|1:0:0:256\|m,a,s,p`	2
`1:65536;2:0;4:6291456;6:262144\|15663105\|1:0:0:256\|m,a,s,p`	1

TCP SYN (p0f)

fingerprint	co-occurrences
`4:53+11:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	1
`6:55+9:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:0`	1
`4:55+9:0:1460:mss*29,10:mss,nop,nop,sok,nop,ws:df,id+:0`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`64240_2-4-8-1-3_1460_7`	1
`64800_2-4-8-1-3_1440_7`	1
`42340_2-1-1-4-1-3_1460_10`	1

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (X11; CrOS x86_64 14541.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36`	1
`Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.3 Safari/537.36`	1

Country

fingerprint	co-occurrences
`SE` · Sweden	2
`MD` · Moldova	1

Network (ASN)

fingerprint	co-occurrences
`AS41281` · KeFF Networks Ltd	1
`AS214379` · South Park Networks LLC	1
`AS43289` · Trabia SRL	1