TLS ClientHello (JA4)

t12d860700_e18388e7f3a3_4446390ac224

first seen 2026-06-14 23:29 · last seen 2026-09-04 03:15 · 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 version12
SNId (domain)
Cipher count86
Extension count7
ALPN00
Ciphers0004, 0005, 0007, 000a, 000d, 0010, 0013, 0016, 002f, 0030, 0031, 0032, 0033, 0035, 0036, 0037, 0038, 0039, 003c, 003d, 003e, 003f, 0040, 0041, 0042, 0043, 0044, 0045, 0067, 0068, 0069, 006a, 006b, 0084, 0085, 0086, 0087, 0088, 0096, 0097, 0098, 0099, 009a, 009c, 009d, 009e, 009f, 00a0, 00a1, 00a2, 00a3, 00a4, 00a5, 00ff, c002, c003, c004, c005, c007, c008, c009, c00a, c00c, c00d, c00e, c00f, c011, c012, c013, c014, c023, c024, c025, c026, c027, c028, c029, c02a, c02b, c02c, c02d, c02e, c02f, c030, c031, c032
Extensions000a, 000b, 000d, 000f, 0015, 0023
Signature algorithms0601, 0602, 0603, 0501, 0502, 0503, 0401, 0402, 0403, 0301, 0302, 0303, 0201, 0202, 0203
JA4_rt12d860700_0004,0005,0007,000a,000d,0010,0013,0016,002f,0030,0031,0032,0033,0035,0036,0037,0038,0039,003c,003d,003e,003f,0040,0041,0042,0043,0044,0045,0067,0068,0069,006a,006b,0084,0085,0086,0087,0088,0096,0097,0098,0099,009a,009c,009d,009e,009f,00a0,00a1,00a2,00a3,00a4,00a5,00ff,c002,c003,c004,c005,c007,c008,c009,c00a,c00c,c00d,c00e,c00f,c011,c012,c013,c014,c023,c024,c025,c026,c027,c028,c029,c02a,c02b,c02c,c02d,c02e,c02f,c030,c031,c032_000a,000b,000d,000f,0015,0023_0601,0602,0603,0501,0502,0503,0401,0402,0403,0301,0302,0303,0201,0202,0203
JA4_o (sample)t12d860700_42de6d1d033a_dbabfdc6ab47
JA4_ro (sample)t12d860700_c030,c02c,c028,c024,c014,c00a,00a5,00a3,00a1,009f,006b,006a,0069,0068,0039,0038,0037,0036,0088,0087,0086,0085,c032,c02e,c02a,c026,c00f,c005,009d,003d,0035,0084,c02f,c02b,c027,c023,c013,c009,00a4,00a2,00a0,009e,0067,0040,003f,003e,0033,0032,0031,0030,009a,0099,0098,0097,0045,0044,0043,0042,c031,c02d,c029,c025,c00e,c004,009c,003c,002f,0096,0041,c012,c008,0016,0013,0010,000d,c00d,c003,000a,0007,c011,c007,c00c,c002,0005,0004,00ff_0000,000b,000a,0023,000d,000f,0015_0601,0602,0603,0501,0502,0503,0401,0402,0403,0301,0302,0303,0201,0202,0203

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
ge11nn030000_6f76d0e5ec76_000000000000_0000000000002
ge11nn050000_ea6f06182064_000000000000_0000000000002

TCP SYN (p0f)

fingerprintco-occurrences
4:49+15:0:1460:mss*20,7:mss,sok,ts,nop,ws:df,id+:01
4:42+22:0:1460:mss*20,7:mss,sok,ts,nop,ws:df,id+:01
4:44+20:0:1380:mss*20,7:mss,sok,ts,nop,ws:df,id+:01
4:45+19:0:1380:mss*20,7:mss,sok,ts,nop,ws:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
29200_2-4-8-1-3_1460_72

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:65.0) Gecko/20100101 Firefox/65.02
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.0 Safari/537.362

Country

fingerprintco-occurrences
US · United States2
KR · South Korea1
IT · Italy1

Network (ASN)

fingerprintco-occurrences
AS16417 · Cisco Systems Ironport Division2
AS3786 · LG DACOM Corporation1
AS31034 · Aruba S.p.A.1