TLS ClientHello (JA4)

t13d1712h2_5b57614c22b0_ef7df7f74e48

first seen 2026-06-11 23:08 · last seen 2026-09-15 12:32 · JSON

Last 7 days (64 observations)

Distinct clients per day (last 30 days, peak 17/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

Protocolt (TLS over TCP)
TLS version13
SNId (domain)
Cipher count17
Extension count12
ALPNh2
Ciphers002f, 0035, 009c, 009d, 1301, 1302, 1303, c009, c00a, c013, c014, c02b, c02c, c02f, c030, cca8, cca9
Extensions000a, 000b, 000d, 0015, 0017, 0023, 002b, 002d, 0033, ff01
Signature algorithms0403, 0804, 0401, 0503, 0805, 0501, 0806, 0601, 0201
JA4_rt13d1712h2_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)

fingerprintco-occurrences
ge20nn060000_ae91ff777030_000000000000_000000000000228
ge20nn06enus_32386ca2063f_000000000000_000000000000158
ge20nr080000_eac7452ad7da_000000000000_00000000000075
ge20nn070000_f327ee591e3a_000000000000_00000000000061
ge20nn070000_fad2baeaef05_000000000000_00000000000040
ge20nn07enus_bba0b359f971_000000000000_00000000000038
ge20nr090000_65d4d215624f_000000000000_00000000000034
ge20nr080000_8ac8c54f0981_000000000000_00000000000027
ge20nr070000_fad2baeaef05_000000000000_00000000000021
ge20nn070000_cab56f593579_000000000000_00000000000020

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;1:4096;8:0;3:1024;4:1048576|25100289|0|a,p,m,s485
2:0;1:4096;8:0;3:1024;4:33554432|25100289|0|m,s,p,a283

TCP SYN (p0f)

fingerprintco-occurrences
4:121+7:0:1412:65535,8:mss,sok,ts,nop,ws::0186
4:47+17:0:1368:64860,9:mss,sok,ts,nop,ws:df,id+:088
4:48+16:0:1368:64860,9:mss,sok,ts,nop,ws:df,id+:077
4:43+21:0:1368:64860,9:mss,sok,ts,nop,ws:df,id+:073
4:115+13:0:1412:65535,8:mss,sok,ts,nop,ws::041
4:44+20:0:1368:64860,9:mss,sok,ts,nop,ws:df,id+:033
4:44+20:0:1418:mss*44,9:mss,sok,ts,nop,ws:df,id+:028
4:49+15:0:1418:mss*44,9:mss,sok,ts,nop,ws:df,id+:022
4:48+16:0:1418:mss*44,9:mss,sok,ts,nop,ws:df,id+:021
4:112+16:0:1412:65535,8:mss,sok,ts,nop,ws::019

TCP SYN (JA4T)

fingerprintco-occurrences
64860_2-4-8-1-3_1368_9229
64240_2-4-8-1-3_1418_9153
65535_2-4-8-1-3_1412_8150

User-Agent

fingerprintco-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/searchbot289
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; ChatGPT-User/1.0; +https://openai.com/bot196
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-Lighthouse147
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-Lighthouse136

Country

fingerprintco-occurrences
US · United States490
TW · Taiwan77
FI · Finland28
NL · Netherlands25
BE · Belgium19
AU · Australia17
PL · Poland14
JP · Japan13
CH · Switzerland13
ES · Spain12

Network (ASN)

fingerprintco-occurrences
AS8075 · Microsoft Corporation485
AS15169 · Google LLC283