TLS ClientHello (JA4)

t13d6912h2_8b2139ff7677_4de21b5f1c9e

first seen 2026-07-15 19:28 · last seen 2026-09-10 13:14 · JSON

Last 7 days (2 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 version13
SNId (domain)
Cipher count69
Extension count12
ALPNh2
Ciphers002f, 0032, 0033, 0035, 0038, 0039, 003c, 003d, 0040, 0041, 0044, 0045, 0067, 006a, 006b, 0084, 0087, 0088, 009c, 009d, 009e, 009f, 00a2, 00a3, 00ba, 00bd, 00be, 00c0, 00c3, 00c4, 00ff, 1301, 1302, 1303, c009, c00a, c013, c014, c023, c024, c027, c028, c02b, c02c, c02f, c030, c050, c051, c052, c053, c056, c057, c05c, c05d, c060, c061, c072, c073, c076, c077, c09c, c09d, c09e, c09f, c0ac, c0ad, cca8, cca9, ccaa
Extensions000a, 000b, 000d, 0015, 0016, 0017, 0023, 002b, 002d, 0033
Signature algorithms0403, 0503, 0603, 0807, 0808, 081a, 081b, 081c, 0809, 080a, 080b, 0804, 0805, 0806, 0401, 0501, 0601, 0303, 0302, 0402, 0502, 0602
JA4_rt13d6912h2_002f,0032,0033,0035,0038,0039,003c,003d,0040,0041,0044,0045,0067,006a,006b,0084,0087,0088,009c,009d,009e,009f,00a2,00a3,00ba,00bd,00be,00c0,00c3,00c4,00ff,1301,1302,1303,c009,c00a,c013,c014,c023,c024,c027,c028,c02b,c02c,c02f,c030,c050,c051,c052,c053,c056,c057,c05c,c05d,c060,c061,c072,c073,c076,c077,c09c,c09d,c09e,c09f,c0ac,c0ad,cca8,cca9,ccaa_000a,000b,000d,0015,0016,0017,0023,002b,002d,0033_0403,0503,0603,0807,0808,081a,081b,081c,0809,080a,080b,0804,0805,0806,0401,0501,0601,0303,0302,0402,0502,0602
JA4_o (sample)t13d6912h2_44141a5ba2e1_42bb4d2dc37b
JA4_ro (sample)t13d6912h2_1302,1303,1301,c02c,c030,00a3,009f,cca9,cca8,ccaa,c0ad,c09f,c05d,c061,c057,c053,c02b,c02f,00a2,009e,c0ac,c09e,c05c,c060,c056,c052,c024,c028,006b,006a,c073,c077,00c4,00c3,c023,c027,0067,0040,c072,c076,00be,00bd,c00a,c014,0039,0038,0088,0087,c009,c013,0033,0032,0045,0044,009d,c09d,c051,009c,c09c,c050,003d,00c0,003c,00ba,0035,0084,002f,0041,00ff_0000,000b,000a,0023,0010,0016,0017,000d,002b,002d,0033,0015_0403,0503,0603,0807,0808,081a,081b,081c,0809,080a,080b,0804,0805,0806,0401,0501,0601,0303,0302,0402,0502,0602

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
ge20nr14enus_c2aca1a568f2_000000000000_0000000000003
ge20nr13enus_36e816d370bc_000000000000_0000000000001
ge20nr14engb_c2aca1a568f2_000000000000_0000000000001
ge20nr14engb_7f5ffb6fb46c_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;6:262144;4:2097152;1:65536|2031617|0|m,a,s,p6

TCP SYN (p0f)

fingerprintco-occurrences
4:55+9:0:1460:65535,6:mss,sok,ts,nop,ws:df,id+:02
4:54+10:0:1460:65535,6:mss,sok,ts,nop,ws:df,id+:02
4:47+17:0:1460:65535,6:mss,sok,ts,nop,ws:df,id+:01
4:45+19:0:1460:65535,6:mss,sok,ts,nop,ws:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-4-8-1-3_1460_66

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/151.0.0.0 Safari/537.36 Edg/151.0.0.03
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/152.0.0.0 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36 Edg/150.0.0.01

Country

fingerprintco-occurrences
ZA · South Africa3
PL · Poland2
IN · India1

Network (ASN)

fingerprintco-occurrences
AS55256 · Netskope Inc6