TLS ClientHello (JA4)

t12d280900_0df5e5c63df4_5c2ba2672724

first seen 2026-06-19 21:58 · last seen 2026-10-29 20:52 · 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	`12`
SNI	`d (domain)`
Cipher count	`28`
Extension count	`9`
ALPN	`00`
Ciphers	`0032, 0033, 0038, 0039, 0040, 0067, 006a, 006b, 009e, 009f, 00a2, 00a3, 00ff, c009, c00a, c013, c014, c023, c024, c027, c028, c02b, c02c, c02f, c030, cca8, cca9, ccaa`
Extensions	`0005, 000a, 000b, 000d, 0011, 0017, 002b, 0032`
Signature algorithms	`0403, 0503, 0603, 0804, 0805, 0806, 0809, 080a, 080b, 0401, 0501, 0601, 0402, 0303, 0301, 0302`
JA4_r	`t12d280900_0032,0033,0038,0039,0040,0067,006a,006b,009e,009f,00a2,00a3,00ff,c009,c00a,c013,c014,c023,c024,c027,c028,c02b,c02c,c02f,c030,cca8,cca9,ccaa_0005,000a,000b,000d,0011,0017,002b,0032_0403,0503,0603,0804,0805,0806,0809,080a,080b,0401,0501,0601,0402,0303,0301,0302`
JA4_o (sample)	`t12d280900_d99beed5f905_cdfd330d675e`
JA4_ro (sample)	`t12d280900_c02c,c02b,cca9,c030,cca8,c02f,009f,ccaa,00a3,009e,00a2,c024,c028,c023,c027,006b,006a,0067,0040,c00a,c014,c009,c013,0039,0038,0033,0032,00ff_0000,0005,000a,000b,000d,0032,0011,0017,002b_0403,0503,0603,0804,0805,0806,0809,080a,080b,0401,0501,0601,0402,0303,0301,0302`

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
`ge10nr040000_532a1ee47909_000000000000_000000000000`	165
`ge10nr040000_ef4d07580f66_000000000000_000000000000`	3
`ge10nr030000_0db47b7d240d_000000000000_000000000000`	1

TCP SYN (p0f)

fingerprint	co-occurrences
`4:56+8:0:1460:mss*29,12:mss,sok,ts,nop,ws:df,id+:0`	91
`4:49+15:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	15
`4:56+8:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	14
`4:57+7:0:1460:mss*29,12:mss,sok,ts,nop,ws:df,id+:0`	11
`4:51+13:0:1460:mss*29,12:mss,sok,ts,nop,ws:df,id+:0`	10
`4:46+18:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	9
`4:47+17:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	8
`4:48+16:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	5
`4:54+10:0:1460:65535,10:mss,sok,ts,nop,ws:df,id+:0`	2
`4:50+14:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`42340_2-4-8-1-3_1460_12`	112
`64240_2-4-8-1-3_1460_7`	48
`65535_2-4-8-1-3_1460_10`	4
`29200_2-4-8-1-3_1460_10`	1

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36`	169

Country

fingerprint	co-occurrences
`NL` · Netherlands	164
`US` · United States	5

Network (ASN)

fingerprint	co-occurrences
`AS211486` · Alferov Aleksey Aleksandrovich	45
`AS213790` · Limited Network LTD	33
`AS205997` · Vlad Cojuhari	28
`AS213474` · HomeLine Broadband LLC	25
`AS213438` · ColocaTel Inc.	19
`AS210328` · AO ALMAZ	12
`AS62240` · Clouvider	5
`AS44589` · admin@ntservers.pro	2

TLS supported groups

fingerprint	co-occurrences
`001d,0017,0018,0019,001e,0100,0101,0102,0103,0104` Match?Exact match in Thumbprint's published controlled catalog captures: java-httpclient 17.0.19, java-httpclient 11.0.31.The fingerprint page shows the full measured match list. More on the catalog.	11