TLS ClientHello (JA4)

t13d1011h2_9a30925095c0_e7c285222651

first seen 2026-06-19 02:41 · last seen 2026-08-27 16:48 · JSON

Distinct clients per day (last 30 days, peak 1/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 count10
Extension count11
ALPNh2
Ciphers009c, 1301, 1302, 1303, c02b, c02c, c02f, c030, cca8, cca9
Extensions0005, 000a, 000b, 000d, 0012, 0017, 002b, 0033, ff01
Signature algorithms0804, 0403, 0807, 0805, 0806, 0401, 0501, 0601, 0503, 0603, 0201, 0203
JA4_rt13d1011h2_009c,1301,1302,1303,c02b,c02c,c02f,c030,cca8,cca9_0005,000a,000b,000d,0012,0017,002b,0033,ff01_0804,0403,0807,0805,0806,0401,0501,0601,0503,0603,0201,0203
JA4_o (sample)t13d1011h2_20488991a18a_fe8fa1c5cc33
JA4_ro (sample)t13d1011h2_c02b,c02f,c02c,c030,cca9,cca8,009c,1301,1302,1303_0000,000b,ff01,0017,0012,0005,000a,000d,0010,002b,0033_0804,0403,0807,0805,0806,0401,0501,0601,0503,0603,0201,0203

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
ge20nr10enus_acdfad1d82ce_000000000000_0000000000001
ge20nr10enus_c4469efa2933_000000000000_0000000000001
ge20nn09enus_0f29f8ddae7d_000000000000_0000000000001
ge20nn09enus_fcb8be2a5004_000000000000_0000000000001
ge20nn09enus_df5fab48b798_000000000000_0000000000001
ge20nn09enus_01d597552306_000000000000_0000000000001
ge20nn09enus_5a53613aa3ac_000000000000_0000000000001
ge20nn09enus_a8dc6775dbbf_000000000000_0000000000001
ge20nn09enus_01b91b340e60_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:4194304;5:16384;6:10485760|1073741824|0|a,m,p,s Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.8, go-net/http 1.26.7, +6 more.The fingerprint page shows the full measured match list. More on the catalog.9

TCP SYN (p0f)

fingerprintco-occurrences
4:51+13:0:1436:mss*44,7:mss,sok,ts,nop,ws:df,id+:07
4:50+14:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:49+15:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1436_76
64240_2-4-8-1-3_1460_71

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.367
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.362

Country

fingerprintco-occurrences
NL · Netherlands7
RU · Russia2

Network (ASN)

fingerprintco-occurrences
AS216071 · SERVERS TECH FZCO7
AS29182 · JSC IOT1
AS48282 · Hosting technology LTD1