TLS ClientHello (JA4)

t13d0911h2_c9b5742070f5_9ced094328c9

first seen 2026-08-18 19:14 · last seen 2026-10-11 11:43 · 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	`9`
Extension count	`11`
ALPN	`h2`
Ciphers	`002f, 009d, 1301, 1302, 1303, c014, c02c, c02f, cca8`
Extensions	`000a, 000b, 000d, 0017, 0023, 002b, 002d, 0033, ff01`
Signature algorithms	`0403, 0804, 0401, 0503, 0805, 0501, 0806, 0601`
JA4_r	`t13d0911h2_002f,009d,1301,1302,1303,c014,c02c,c02f,cca8_000a,000b,000d,0017,0023,002b,002d,0033,ff01_0403,0804,0401,0503,0805,0501,0806,0601`
JA4_o (sample)	`t13d0911h2_9ece3965370b_2fd733b3b9a5`
JA4_ro (sample)	`t13d0911h2_1301,1302,1303,cca8,002f,c014,c02f,c02c,009d_000a,002d,0033,000b,0010,0000,000d,0017,0023,ff01,002b_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)

fingerprint	co-occurrences
`ge20nn04enus_989c7cc05c9b_000000000000_000000000000`	6

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`	6

TCP SYN (p0f)

fingerprint	co-occurrences
`4:51+13:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	1
`4:52+12:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	1
`4:55+9:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	1
`4:50+14:0:1460:mss*29,11:mss,sok,ts,nop,ws:df,id+:0`	1
`4:53+11:0:8902:mss*7,12:mss,sok,ts,nop,ws:df,id+,ecn:0`	1
`4:60+4:0:1354:mss*44,9:mss,sok,ts,nop,ws:df,id+:0`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`64240_2-4-8-1-3_1460_7`	3
`42340_2-4-8-1-3_1460_11`	1
`62314_2-4-8-1-3_8902_12`	1
`64240_2-4-8-1-3_1354_9`	1

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.1 Safari/537.36`	3
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.3 Safari/537.36`	3

Country

fingerprint	co-occurrences
`US` · United States	2
`SE` · Sweden	2
`DE` · Germany	1
`CH` · Switzerland	1

Network (ASN)

fingerprint	co-occurrences
`AS60729` · Stiftung Erneuerbare Freiheit	1
`AS53667` · FranTech Solutions	1
`AS401401` · Unredacted Inc	1
`AS198093` · Foreningen for digitala fri- och rattigheter	1
`AS214503` · QuxLabs AB	1
`AS62744` · Quintex Alliance Consulting	1