TLS ClientHello (JA4)

t13d1712h2_5b57614c22b0_ef7df7f74e48

first seen 2026-06-11 23:08 · last seen 2026-10-30 20:45 · JSON

Last 7 days (69 observations)

Distinct clients per day (last 30 days, peak 19/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	`12`
ALPN	`h2`
Ciphers	`002f, 0035, 009c, 009d, 1301, 1302, 1303, c009, c00a, c013, c014, c02b, c02c, c02f, c030, cca8, cca9`
Extensions	`000a, 000b, 000d, 0015, 0017, 0023, 002b, 002d, 0033, ff01`
Signature algorithms	`0403, 0804, 0401, 0503, 0805, 0501, 0806, 0601, 0201`
JA4_r	`t13d1712h2_002f,0035,009c,009d,1301,1302,1303,c009,c00a,c013,c014,c02b,c02c,c02f,c030,cca8,cca9_000a,000b,000d,0015,0017,0023,002b,002d,0033,ff01_0403,0804,0401,0503,0805,0501,0806,0601,0201`
JA4_o (sample)	`t13d1712h2_a1173ee55758_660b27e01e73`
JA4_ro (sample)	`t13d1712h2_1301,1302,1303,c02b,cca9,c02f,cca8,c009,c013,009c,002f,c02c,c030,c00a,c014,009d,0035_0000,0017,ff01,000a,000b,0023,0010,000d,0033,002d,002b,0015_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
`ge20nn060000_ae91ff777030_000000000000_000000000000`	423
`ge20nn06enus_32386ca2063f_000000000000_000000000000`	303
`ge20nr080000_eac7452ad7da_000000000000_000000000000`	115
`ge20nn070000_f327ee591e3a_000000000000_000000000000`	61
`ge20nn070000_fad2baeaef05_000000000000_000000000000`	61
`ge20nn07enus_bba0b359f971_000000000000_000000000000`	38
`ge20nr090000_65d4d215624f_000000000000_000000000000`	34
`ge20nr070000_fad2baeaef05_000000000000_000000000000`	33
`ge20nr080000_8ac8c54f0981_000000000000_000000000000`	27
`ge20nn070000_cab56f593579_000000000000_000000000000`	20

HTTP/2 frames (Akamai)

fingerprint	co-occurrences
`2:0;1:4096;8:0;3:1024;4:1048576\|25100289\|0\|a,p,m,s`	828
`2:0;1:4096;8:0;3:1024;4:33554432\|25100289\|0\|m,s,p,a`	356

TCP SYN (p0f)

fingerprint	co-occurrences
`4:121+7:0:1412:65535,8:mss,sok,ts,nop,ws::0`	256
`4:43+21:0:1368:64860,9:mss,sok,ts,nop,ws:df,id+:0`	158
`4:44+20:0:1368:64860,9:mss,sok,ts,nop,ws:df,id+:0`	137
`4:47+17:0:1368:64860,9:mss,sok,ts,nop,ws:df,id+:0`	88
`4:48+16:0:1368:64860,9:mss,sok,ts,nop,ws:df,id+:0`	77
`4:44+20:0:1418:mss*44,9:mss,sok,ts,nop,ws:df,id+:0`	45
`4:115+13:0:1412:65535,8:mss,sok,ts,nop,ws::0`	41
`4:48+16:0:1418:mss*44,9:mss,sok,ts,nop,ws:df,id+:0`	38
`4:38+26:0:1418:mss*44,9:mss,sok,ts,nop,ws:df,id+:0`	33
`4:49+15:0:1418:mss*44,9:mss,sok,ts,nop,ws:df,id+:0`	32

TCP SYN (JA4T)

fingerprint	co-occurrences
`64860_2-4-8-1-3_1368_9`	424
`64240_2-4-8-1-3_1418_9`	298
`65535_2-4-8-1-3_1412_8`	223
`65535_2-4-8-1-3_1390_12`	3

User-Agent

fingerprint	co-occurrences
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36; compatible; OAI-SearchBot/1.0; +https://openai.com/searchbot`	484
`Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; ChatGPT-User/1.0; +https://openai.com/bot`	341
`Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36 Chrome-Lighthouse`	183
`Mozilla/5.0 (Linux; Android 11; moto g power (2022)) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Mobile Safari/537.36 Chrome-Lighthouse`	173
`Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot)`	3

Country

fingerprint	co-occurrences
`US` · United States	791
`TW` · Taiwan	77
`AU` · Australia	35
`JP` · Japan	29
`NL` · Netherlands	28
`FI` · Finland	28
`BE` · Belgium	27
`CH` · Switzerland	25
`PL` · Poland	24
`DK` · Denmark	19

Network (ASN)

fingerprint	co-occurrences
`AS8075` · Microsoft Corporation	828
`AS15169` · Google LLC	356

TLS supported groups

fingerprint	co-occurrences
`001d,0017,0018,0019` Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.21.13.The fingerprint page shows the full measured match list. More on the catalog.	130
`0017`	26