TLS ClientHello (JA4)

t13d3515h1_8f004308c246_5c2c66f702b0

first seen 2026-06-13 18:52 · last seen 2026-08-21 06:15 · JSON

Distinct clients per day (last 30 days, peak 10/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 count35
Extension count15
ALPNh1
Ciphers0005, 000a, 0016, 002f, 0033, 0035, 0039, 003c, 0067, 006b, 009c, 009d, 009e, 009f, 1301, 1302, 1303, c007, c009, c00a, c011, c012, c013, c014, c023, c027, c02b, c02c, c02f, c030, cc13, cc14, cca8, cca9, ccaa
Extensions0005, 000a, 000b, 000d, 0017, 001c, 0022, 0023, 002b, 002d, 0033, fe0d, ff01
Signature algorithms0403, 0503, 0603, 0804, 0805, 0806, 0401, 0501, 0601, 0203, 0201
JA4_rt13d3515h1_0005,000a,0016,002f,0033,0035,0039,003c,0067,006b,009c,009d,009e,009f,1301,1302,1303,c007,c009,c00a,c011,c012,c013,c014,c023,c027,c02b,c02c,c02f,c030,cc13,cc14,cca8,cca9,ccaa_0005,000a,000b,000d,0017,001c,0022,0023,002b,002d,0033,fe0d,ff01_0403,0503,0603,0804,0805,0806,0401,0501,0601,0203,0201
JA4_o (sample)t13d3515h1_9a395912533a_e7cd4f1676b9
JA4_ro (sample)t13d3515h1_1301,1303,1302,c02b,c02f,cca9,cca8,c02c,c030,c00a,c009,c013,c014,009c,009d,002f,0035,c027,c023,ccaa,009e,009f,0067,006b,0033,0039,003c,c012,0016,000a,0005,c011,c007,cc13,cc14_0000,0017,ff01,000a,000b,0023,0010,0005,0022,0033,002b,000d,002d,001c,fe0d_0403,0503,0603,0804,0805,0806,0401,0501,0601,0203,0201

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
ge11nn050000_a1c329e38462_000000000000_000000000000228
po11nn080000_86f5668e3d93_000000000000_000000000000110
ge11nn040000_88d30a62b7ad_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: wget 1.25.0.The fingerprint page shows the full measured match list. More on the catalog.25
po11nn070000_ce951b014b9b_000000000000_00000000000024

TCP SYN (p0f)

fingerprintco-occurrences
4:56+8:0:1460:mss*29,9:mss,sok,ts,nop,ws:df,id+:0182
4:56+8:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0109
4:50+14:0:1460:mss*29,9:mss,sok,ts,nop,ws:df,id+:047
4:57+7:0:1460:mss*29,9:mss,sok,ts,nop,ws:df,id+:043
4:57+7:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:04
4:53+11:0:1460:mss*29,9:mss,sok,ts,nop,ws:df,id+:02

TCP SYN (JA4T)

fingerprintco-occurrences
42340_2-4-8-1-3_1460_9225
64240_2-4-8-1-3_1460_7113

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (compatible; Infrawatch/1.0; +https://infrawat.ch/)387

Country

fingerprintco-occurrences
GB · United Kingdom295
DE · Germany54
NL · Netherlands38

Network (ASN)

fingerprintco-occurrences
AS25369 · Hydra Communications Ltd387