TLS ClientHello (JA4)

t12d2109h1_76e208dd3e22_7af1ed941c26

first seen 2026-07-04 01:17 · last seen 2026-09-12 10:24 · 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	`21`
Extension count	`9`
ALPN	`h1`
Ciphers	`000a, 002f, 0035, 003c, 003d, 009c, 009d, 009e, 009f, c009, c00a, c013, c014, c023, c024, c027, c028, c02b, c02c, c02f, c030`
Extensions	`0005, 000a, 000b, 000d, 0017, 0023, ff01`
Signature algorithms	`0804, 0805, 0806, 0401, 0501, 0201, 0403, 0503, 0203, 0202, 0601, 0603`
JA4_r	`t12d2109h1_000a,002f,0035,003c,003d,009c,009d,009e,009f,c009,c00a,c013,c014,c023,c024,c027,c028,c02b,c02c,c02f,c030_0005,000a,000b,000d,0017,0023,ff01_0804,0805,0806,0401,0501,0201,0403,0503,0203,0202,0601,0603`
JA4_o (sample)	`t12d2109h1_93eee3d26c42_5da3d607c71a`
JA4_ro (sample)	`t12d2109h1_c02c,c02b,c030,c02f,009f,009e,c024,c023,c028,c027,c00a,c009,c014,c013,009d,009c,003d,003c,0035,002f,000a_0000,0005,000a,000b,000d,0023,0010,0017,ff01_0804,0805,0806,0401,0501,0201,0403,0503,0203,0202,0601,0603`

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
`ge11nn030000_fe444ad14866_000000000000_000000000000` Match?Exact match in Thumbprint's published controlled catalog captures: curl 8.16.0.The fingerprint page shows the full measured match list. More on the catalog.	7
`ge11nn040000_42db7fa4390b_000000000000_000000000000`	3
`ge11nn040000_08e7224bf8c7_000000000000_000000000000`	2
`ge11cr05frfr_4d476ba51937_fc403084c977_b8b53f995481`	1

TCP SYN (p0f)

fingerprint	co-occurrences
`4:49+15:0:1460:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df:0`	2
`4:113+15:0:1460:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:0`	2
`4:114+14:0:1460:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:0`	2
`4:115+13:0:1460:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:0`	1
`4:50+14:0:1460:65535,6:mss,nop,ws,nop,nop,ts,sok,eol+1:df:0`	1
`4:102+26:0:1460:mss*44,8:mss,nop,ws,sok,ts:df,id+:0`	1
`6:54+10:0:1414:65535,8:mss,sok,ts,nop,ws:flow:0`	1
`6:54+10:0:1246:65535,8:mss,sok,ts,nop,ws:flow:0`	1
`4:113+15:0:1452:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:0`	1
`4:48+16:0:1412:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:0`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`64240_2-1-3-1-1-4_1460_8`	5
`65535_2-1-3-1-1-8-4-0-0_1460_6`	3
`64240_2-1-3-4-8_1460_8`	1
`65535_2-4-8-1-3_1414_8`	1
`65535_2-4-8-1-3_1246_8`	1
`64240_2-1-3-1-1-4_1452_8`	1
`64240_2-1-3-1-1-4_1412_8`	1

User-Agent

fingerprint	co-occurrences
`curl/8.13.0`	10
`curl/8.21.0`	2
`curl/7.83.1`	1

Country

fingerprint	co-occurrences
`RU` · Russia	4
`PL` · Poland	3
`US` · United States	2
`FR` · France	2
`CN` · China	1
`VN` · Vietnam	1

Network (ASN)

fingerprint	co-occurrences
`AS214413` · WYOCORE TECHNOLOGIES LLC	3
`AS12389` · PJSC Rostelecom	2
`AS20001` · Charter Communications Inc	2
`AS52075` · Wifirst S.A.S.	2
`AS9808` · China Mobile Communications Group Co., Ltd.	1
`AS7552` · Viettel Group	1
`AS34602` · MEGASVYAZ LLC	1
`AS208626` · ServTech LTD	1