TLS ClientHello (JA4)

t13d1717h2_5b57614c22b0_05692a343078

first seen 2026-10-19 09:47 · last seen 2026-10-29 12:31 · JSON

Last 7 days (2 observations)

Distinct clients per day (last 30 days, peak 2/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 count17
ALPNh2
Ciphers002f, 0035, 009c, 009d, 1301, 1302, 1303, c009, c00a, c013, c014, c02b, c02c, c02f, c030, cca8, cca9
Extensions0005, 000a, 000b, 000d, 0012, 0017, 001b, 001c, 0022, 0023, 002b, 002d, 0033, fe0d, ff01
Signature algorithms0201, 0203, 0401, 0403, 0501, 0503, 0601, 0603, 0804, 0805, 0806, 0807, 0808
JA4_rt13d1717h2_002f,0035,009c,009d,1301,1302,1303,c009,c00a,c013,c014,c02b,c02c,c02f,c030,cca8,cca9_0005,000a,000b,000d,0012,0017,001b,001c,0022,0023,002b,002d,0033,fe0d,ff01_0201,0203,0401,0403,0501,0503,0601,0603,0804,0805,0806,0807,0808
JA4_o (sample)t13d1717h2_5b234860e130_8b2e80f1ce0f
JA4_ro (sample)t13d1717h2_1301,1303,1302,c02b,c02f,cca9,cca8,c02c,c030,c00a,c009,c013,c014,009c,009d,002f,0035_001b,001c,0022,000b,ff01,0000,0017,0023,000a,0010,0005,0012,0033,002b,000d,002d,fe0d_0201,0203,0401,0403,0501,0503,0601,0603,0804,0805,0806,0807,0808

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
ge20nn11enus_3901d4197baf_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 152.0.5, firefox 153.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog.3

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:131072;5:16384;6:16384|12451842|0|m,a,s,p3

TCP SYN (p0f)

fingerprintco-occurrences
4:45+19:0:1360:mss*48,7:mss,sok,ts,nop,ws:df,id+:03

TCP SYN (JA4T)

fingerprintco-occurrences
65280_2-4-8-1-3_1360_73

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:144.0) Gecko/20100101 Firefox/144.03

Country

fingerprintco-occurrences
DE · Germany3

Network (ASN)

fingerprintco-occurrences
AS24940 · Hetzner Online GmbH3

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,0018,0019,0100,01013