TLS ClientHello (JA4)

t13d1713h2_5b57614c22b0_02c8e53ee398

first seen 2026-06-12 09:38 · last seen 2026-10-31 22:12 · JSON

Last 7 days (30 observations)

Distinct clients per day (last 30 days, peak 11/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_000000000000213
ge20nn060000_ae91ff777030_000000000000_00000000000095
ge20nn07enus_bba0b359f971_000000000000_00000000000018
ge20nn070000_f327ee591e3a_000000000000_0000000000008
ge20nr040000_ac162d8a7b0c_000000000000_0000000000008

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;1:4096;8:0;3:1024;4:1048576|25100289|0|a,p,m,s342

TCP SYN (p0f)

fingerprintco-occurrences
4:39+25:0:1418:mss*44,9:mss,sok,ts,nop,ws:df,id+:032
4:43+21:0:1368:64860,9:mss,sok,ts,nop,ws:df,id+:029
4:44+20:0:1368:64860,9:mss,sok,ts,nop,ws:df,id+:029
4:49+15:0:1418:mss*44,9:mss,sok,ts,nop,ws:df,id+:028
4:48+16:0:1418:mss*44,9:mss,sok,ts,nop,ws:df,id+:024
4:44+20:0:1418:mss*44,9:mss,sok,ts,nop,ws:df,id+:021
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+:020
4:43+21:0:1418:mss*44,9:mss,sok,ts,nop,ws:df,id+:016
4:38+26:0:1418:mss*44,9:mss,sok,ts,nop,ws:df,id+:016

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1418_9210
64860_2-4-8-1-3_1368_995
65535_2-4-8-1-3_1390_128

User-Agent

fingerprintco-occurrences
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; ChatGPT-User/1.0; +https://openai.com/bot231
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/searchbot103
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.4; +https://openai.com/gptbot)8

Country

fingerprintco-occurrences
US · United States178
AU · Australia17
PL · Poland15
DE · Germany13
CH · Switzerland13
ES · Spain13
KR · South Korea12
DK · Denmark12
JP · Japan11
NZ · New Zealand11

Network (ASN)

fingerprintco-occurrences
AS8075 · Microsoft Corporation342

TLS supported groups

fingerprintco-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.66