TLS ClientHello (JA4)

t13d1713h2_5b57614c22b0_02c8e53ee398

first seen 2026-06-12 09:38 · last seen 2026-09-16 11:18 · JSON

Last 7 days (20 observations)

Distinct clients per day (last 30 days, peak 7/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 count13
ALPNh2
Ciphers002f, 0035, 009c, 009d, 1301, 1302, 1303, c009, c00a, c013, c014, c02b, c02c, c02f, c030, cca8, cca9
Extensions000a, 000b, 000d, 0015, 0017, 0023, 0029, 002b, 002d, 0033, ff01
Signature algorithms0403, 0804, 0401, 0503, 0805, 0501, 0806, 0601, 0201
JA4_rt13d1713h2_002f,0035,009c,009d,1301,1302,1303,c009,c00a,c013,c014,c02b,c02c,c02f,c030,cca8,cca9_000a,000b,000d,0015,0017,0023,0029,002b,002d,0033,ff01_0403,0804,0401,0503,0805,0501,0806,0601,0201
JA4_o (sample)t13d1713h2_a1173ee55758_99b0ca6b86d2
JA4_ro (sample)t13d1713h2_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,0015,0029_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
ge20nn06enus_32386ca2063f_000000000000_00000000000097
ge20nn060000_ae91ff777030_000000000000_00000000000052
ge20nn07enus_bba0b359f971_000000000000_00000000000018
ge20nn070000_f327ee591e3a_000000000000_0000000000008

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;1:4096;8:0;3:1024;4:1048576|25100289|0|a,p,m,s175

TCP SYN (p0f)

fingerprintco-occurrences
4:47+17:0:1368:64860,9:mss,sok,ts,nop,ws:df,id+:021
4:48+16:0:1368:64860,9:mss,sok,ts,nop,ws:df,id+:019
4:44+20:0:1418:mss*44,9:mss,sok,ts,nop,ws:df,id+:014
4:49+15:0:1418:mss*44,9:mss,sok,ts,nop,ws:df,id+:013
4:39+25:0:1418:mss*44,9:mss,sok,ts,nop,ws:df,id+:011
4:45+19:0:1418:mss*44,9:mss,sok,ts,nop,ws:df,id+:011
4:43+21:0:1418:mss*44,9:mss,sok,ts,nop,ws:df,id+:010
4:48+16:0:1418:mss*44,9:mss,sok,ts,nop,ws:df,id+:010
4:40+24:0:1418:mss*44,9:mss,sok,ts,nop,ws:df,id+:09
4:44+20:0:1368:64860,9:mss,sok,ts,nop,ws:df,id+:09

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1418_995
64860_2-4-8-1-3_1368_951

User-Agent

fingerprintco-occurrences
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; ChatGPT-User/1.0; +https://openai.com/bot115
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/searchbot60

Country

fingerprintco-occurrences
US · United States94
PL · Poland11
AU · Australia10
ES · Spain8
NZ · New Zealand8
CH · Switzerland7
KR · South Korea6
DE · Germany5
JP · Japan5
SG · Singapore5

Network (ASN)

fingerprintco-occurrences
AS8075 · Microsoft Corporation175