TLS ClientHello (JA4)

t13d1717h1_5b57614c22b0_3cbfd9057e0d

first seen 2026-07-01 15:37 · last seen 2026-09-16 11:49 · JSON

Last 7 days (7 observations)

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

Protocol	`t (TLS over TCP)`
TLS version	`13`
SNI	`d (domain)`
Cipher count	`17`
Extension count	`17`
ALPN	`h1`
Ciphers	`002f, 0035, 009c, 009d, 1301, 1302, 1303, c009, c00a, c013, c014, c02b, c02c, c02f, c030, cca8, cca9`
Extensions	`0005, 000a, 000b, 000d, 0012, 0017, 001b, 001c, 0022, 0023, 002b, 002d, 0033, fe0d, ff01`
Signature algorithms	`0403, 0503, 0603, 0804, 0805, 0806, 0401, 0501, 0601, 0203, 0201`
JA4_r	`t13d1717h1_002f,0035,009c,009d,1301,1302,1303,c009,c00a,c013,c014,c02b,c02c,c02f,c030,cca8,cca9_0005,000a,000b,000d,0012,0017,001b,001c,0022,0023,002b,002d,0033,fe0d,ff01_0403,0503,0603,0804,0805,0806,0401,0501,0601,0203,0201`
JA4_o (sample)	`t13d1717h1_5b234860e130_df135d36b6d5`
JA4_ro (sample)	`t13d1717h1_1301,1303,1302,c02b,c02f,cca9,cca8,c02c,c030,c00a,c009,c013,c014,009c,009d,002f,0035_0000,0017,ff01,000a,000b,0023,0010,0005,0022,0012,0033,002b,000d,002d,001c,001b,fe0d_0403,0503,0603,0804,0805,0806,0401,0501,0601,0203,0201`

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
`ge11nn12enus_9a9494a1019e_000000000000_000000000000`	8
`ge11nn13enus_3847fe6861ec_000000000000_000000000000`	4
`ge11nn13enus_8670eed6f6e5_000000000000_000000000000`	2
`ge11nn06enus_a89d28968959_000000000000_000000000000`	1
`ge11nn15enus_5a575be91661_000000000000_000000000000`	1

TCP SYN (p0f)

fingerprint	co-occurrences
`4:51+13:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	3
`4:53+11:0:1460:mss*29,11:mss,sok,ts,nop,ws:df,id+:0`	3
`4:44+20:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	3
`6:45+19:0:1360:mss*48,7:mss,sok,ts,nop,ws:flow:0`	2
`4:38+26:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	1
`4:46+18:0:1460:mss*29,9:mss,sok,ts,nop,ws:df,id+:0`	1
`4:44+20:0:1460:mss*29,9:mss,sok,ts,nop,ws:df,id+:0`	1
`4:53+11:0:1436:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	1
`6:50+14:0:1432:mss*45,7:mss,sok,ts,nop,ws:flow:0`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`64240_2-4-8-1-3_1460_7`	7
`42340_2-4-8-1-3_1460_11`	3
`65280_2-4-8-1-3_1360_7`	2
`42340_2-4-8-1-3_1460_9`	2
`64240_2-4-8-1-3_1436_7`	1
`64440_2-4-8-1-3_1432_7`	1

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:148.0) Gecko/20100101 Firefox/148.0`	8
`Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:140.0) Gecko/20100101 Firefox/140.0`	6
`Mozilla/5.0 (X11; Linux x86_64; rv:140.0) Gecko/20100101 Firefox/140.0`	1
`Mozilla/5.0 (X11; Linux x86_64; rv:152.0) Gecko/20100101 Firefox/152.0`	1

Country

fingerprint	co-occurrences
`DE` · Germany	6
`NL` · Netherlands	3
`DK` · Denmark	2
`US` · United States	1
`CA` · Canada	1
`FR` · France	1
`FI` · Finland	1
`IT` · Italy	1

Network (ASN)

fingerprint	co-occurrences
`AS197540` · netcup GmbH	3
`AS47674` · Net Solutions - Consultoria Em Tecnologias De Informacao, Sociedade Unipessoal LDA	3
`AS16276` · OVH SAS	2
`AS13101` · TNG Stadtnetz GmbH	2
`AS204151` · EWII Bredbaand A/S	2
`AS24940` · Hetzner Online GmbH	1
`AS51167` · Contabo GmbH	1
`AS1403` · EBOX	1
`AS393577` · Tritan Development	1