TLS ClientHello (JA4)

t13d1713h1_5b57614c22b0_6a3d802a7139

first seen 2026-09-29 14:19 · last seen 2026-10-22 20:37 · JSON

Distinct clients per day (last 30 days, peak 4/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	`13`
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, 0023, 002b, 002d, 0033, ff01`
Signature algorithms	`0403, 0804, 0401, 0503, 0805, 0501, 0806, 0601, 0201`
JA4_r	`t13d1713h1_002f,0035,009c,009d,1301,1302,1303,c009,c00a,c013,c014,c02b,c02c,c02f,c030,cca8,cca9_0005,000a,000b,000d,0012,0017,0023,002b,002d,0033,ff01_0403,0804,0401,0503,0805,0501,0806,0601,0201`
JA4_o (sample)	`t13d1713h1_bbc337f0a232_efc1c2d1c1f8`
JA4_ro (sample)	`t13d1713h1_1301,1302,1303,c02b,c02f,c02c,c030,cca9,cca8,c009,c013,c00a,c014,009c,009d,002f,0035_0000,0017,ff01,000a,000b,0023,0010,0005,000d,0012,0033,002d,002b_0403,0804,0401,0503,0805,0501,0806,0601,0201`

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
`ge11nn050000_ecbf4e651318_000000000000_000000000000`	9
`ge11nr040000_e1d2031bdfea_000000000000_000000000000`	3
`ge11nn06enus_caba6ee6695d_000000000000_000000000000`	3
`ge11nn08enus_0e9bd3873e9d_000000000000_000000000000`	2
`ge11nr06enus_4a866391d276_000000000000_000000000000`	1
`ge11nn050000_8a08de6f3d0a_000000000000_000000000000`	1
`ge11nn06en00_22f00d37a95d_000000000000_000000000000`	1

TCP SYN (p0f)

fingerprint	co-occurrences
`4:119+9:0:1460:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0`	13
`4:46+18:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:0`	1
`4:49+15:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:0`	1
`4:56+8:0:1460:65535,10:mss,sok,ts,nop,ws:df,id+:0`	1
`4:45+19:0:1340:mss*48,7:mss,sok,ts,nop,ws:df,id+:0`	1
`4:111+17:0:1460:65535,8:mss,nop,ws,nop,nop,sok:df,id+:0`	1
`4:111+17:0:1412:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:0`	1
`4:110+18:0:1400:mss*44,8:mss,nop,ws,nop,nop,sok::0`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`65535_2-1-3-1-1-4_1460_8`	14
`64240_2-4-8-1-3_1460_10`	2
`65535_2-4-8-1-3_1460_10`	1
`64240_2-1-3-1-1-4_1400_8`	1
`64320_2-4-8-1-3_1340_7`	1
`64240_2-1-3-1-1-4_1412_8`	1

User-Agent

fingerprint	co-occurrences
`Bun/1.4.3`	12
`curl/8.0`	3
`Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; OpenCode-User/1.0; +https://opencode.ai`	2
`Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36`	1
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_1) AppleWebKit/601.2.4 (KHTML, like Gecko) Version/9.0.1 Safari/601.2.4 facebookexternalhit/1.1 Facebot Twitterbot/1.0`	1
`opencode-smartfetch/1.0`	1

Country

fingerprint	co-occurrences
`HK` · Hong Kong SAR China	14
`DE` · Germany	1
`US` · United States	1
`CH` · Switzerland	1
`BG` · Bulgaria	1
`FI` · Finland	1
`VN` · Vietnam	1

Network (ASN)

fingerprint	co-occurrences
`AS9269` · Hong Kong Broadband Network Ltd.	13
`AS50304` · Blix Solutions AS	1
`AS16591` · Google Fiber Inc.	1
`AS7552` · Viettel Group	1
`AS29222` · Infomaniak	1
`AS29580` · A1 Bulgaria EAD	1
`AS204646` · web2objects GmbH	1
`AS58453` · China Mobile International Limited	1

TLS supported groups

fingerprint	co-occurrences
`11ec,001d,0017,0018` Match?Exact match in Thumbprint's published controlled catalog captures: chrome 155.0.8059.40, chrome 156.0.8078.73, chromium 156.0.8078.47, +8 more.The fingerprint page shows the full measured match list. More on the catalog.	17