TLS ClientHello (JA4)

t13d2213h2_231e334592e8_e24568c0d440

first seen 2026-10-13 12:06 · last seen 2026-10-13 20:53 · JSON

Distinct clients per day (last 30 days, peak 3/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 count22
Extension count13
ALPNh2
Ciphers002f, 0035, 003c, 003d, 009c, 009d, 009e, 009f, 1301, 1302, c009, c00a, c013, c014, c023, c024, c027, c028, c02b, c02c, c02f, c030
Extensions0005, 000a, 000b, 000d, 0017, 0023, 002b, 002d, 0031, 0033, ff01
Signature algorithms0804, 0805, 0806, 0401, 0501, 0201, 0403, 0503, 0203, 0202, 0601, 0603
JA4_rt13d2213h2_002f,0035,003c,003d,009c,009d,009e,009f,1301,1302,c009,c00a,c013,c014,c023,c024,c027,c028,c02b,c02c,c02f,c030_0005,000a,000b,000d,0017,0023,002b,002d,0031,0033,ff01_0804,0805,0806,0401,0501,0201,0403,0503,0203,0202,0601,0603
JA4_o (sample)t13d2213h2_fd6997f2ee80_53aa1bee5020
JA4_ro (sample)t13d2213h2_1302,1301,c02c,c02b,c030,c02f,009f,009e,c024,c023,c028,c027,c00a,c009,c014,c013,009d,009c,003d,003c,0035,002f_0000,0005,002b,000d,0023,000a,000b,0010,0033,0031,0017,ff01,002d_0804,0805,0806,0401,0501,0201,0403,0503,0203,0202,0601,0603

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
ge20nn000000_000000000000_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: rust-hyper 1.11.1, rust-hyper 1.11.0, rust-hyper 1.12.0, +1 more.The fingerprint page shows the full measured match list. More on the catalog.4

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:65535|67043329|0|m,s,a,p Match?Exact match in Thumbprint's published controlled catalog captures: powershell 7.6.6, powershell 7.6.8.The fingerprint page shows the full measured match list. More on the catalog.4

TCP SYN (p0f)

fingerprintco-occurrences
4:110+18:0:1440:65535,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:01
4:109+19:0:1440:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:01
4:114+14:0:1440:65535,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:01
4:110+18:0:1440:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:01

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-1-3-1-1-4_1440_82
65535_2-1-3-1-1-4_1440_82

Country

fingerprintco-occurrences
US · United States4

Network (ASN)

fingerprintco-occurrences
AS8075 · Microsoft Corporation4