TLS ClientHello (JA4)

t12i570500_2a2bed94251f_a1e935682795

first seen 2026-06-12 06:33 · last seen 2026-10-26 23:41 · JSON

Last 7 days (7 observations)

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
SNIi (no SNI / IP)
Cipher count57
Extension count5
ALPN00
Ciphers0001, 0002, 0004, 0005, 000a, 002f, 0035, 003b, 003c, 003d, 0041, 0084, 0096, 009c, 009d, 00ff, c001, c002, c003, c004, c005, c006, c007, c008, c009, c00a, c00b, c00c, c00d, c00e, c00f, c010, c011, c012, c013, c014, c015, c016, c017, c018, c019, c023, c024, c025, c026, c027, c028, c029, c02a, c02b, c02c, c02d, c02e, c02f, c030, c031, c032
Extensions000a, 000b, 000d, 000f, 0023
Signature algorithms0601, 0602, 0603, 0501, 0502, 0503, 0401, 0402, 0403, 0301, 0302, 0303, 0201, 0202, 0203
JA4_rt12i570500_0001,0002,0004,0005,000a,002f,0035,003b,003c,003d,0041,0084,0096,009c,009d,00ff,c001,c002,c003,c004,c005,c006,c007,c008,c009,c00a,c00b,c00c,c00d,c00e,c00f,c010,c011,c012,c013,c014,c015,c016,c017,c018,c019,c023,c024,c025,c026,c027,c028,c029,c02a,c02b,c02c,c02d,c02e,c02f,c030,c031,c032_000a,000b,000d,000f,0023_0601,0602,0603,0501,0502,0503,0401,0402,0403,0301,0302,0303,0201,0202,0203
JA4_o (sample)t12i570500_9bc2ed4c5486_318da70f1e40
JA4_ro (sample)t12i570500_c030,c02c,c028,c024,c014,c00a,c019,c032,c02e,c02a,c026,c00f,c005,009d,003d,0035,0084,c02f,c02b,c027,c023,c013,c009,c018,c031,c02d,c029,c025,c00e,c004,009c,003c,002f,0096,0041,c011,c007,c016,c00c,c002,0005,0004,c012,c008,c017,c00d,c003,000a,c010,c006,c015,c00b,c001,003b,0002,0001,00ff_000b,000a,0023,000d,000f_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
ge11nn020000_70500bd9c457_000000000000_00000000000029
ge11nn040000_3d99853a3f52_000000000000_00000000000024
ge11nn040000_314255b4f893_000000000000_0000000000005
ge11nn020000_549fad093d6b_000000000000_0000000000005

TCP SYN (p0f)

fingerprintco-occurrences
4:51+13:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:028
4:56+8:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:010
4:50+14:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:09
4:48+16:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:07
4:53+11:0:1460:mss*44,11:mss,sok,ts,nop,ws:df,id+:06
4:49+15:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:02
4:50+14:0:1460:mss*44,11:mss,sok,ts,nop,ws:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_744
64240_2-4-8-1-3_1460_117

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/98.0.4758.102 Safari/537.3629

Country

fingerprintco-occurrences
US · United States42
NL · Netherlands21

Network (ASN)

fingerprintco-occurrences
AS174 · Cogent Communications, LLC36
AS202425 · IP Volume inc12
AS12989 · Black HOST Ltd9
AS10439 · CariNet, Inc.6

TLS supported groups

fingerprintco-occurrences
0017,0019,001c,001b,0018,001a,0016,000e,000d,000b,000c,0009,000a9