TLS ClientHello (JA4)

t13d1714h1_ab0a1bf427ad_5ae85263eb3b

first seen 2026-06-30 14:51 · last seen 2026-08-31 13:18 · 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 version13
SNId (domain)
Cipher count17
Extension count14
ALPNh1
Ciphers0067, 006b, 009e, 009f, 1301, 1302, 1303, c023, c024, c027, c028, c02b, c02c, c02f, c030, cca8, cca9
Extensions000a, 000b, 000d, 0016, 0017, 001b, 0023, 002b, 002d, 0031, 0033, ff01
Signature algorithms0905, 0906, 0904, 0403, 0503, 0603, 0807, 0808, 081a, 081b, 081c, 0809, 080a, 080b, 0804, 0805, 0806, 0401, 0501, 0601, 0303, 0301, 0302, 0402, 0502, 0602
JA4_rt13d1714h1_0067,006b,009e,009f,1301,1302,1303,c023,c024,c027,c028,c02b,c02c,c02f,c030,cca8,cca9_000a,000b,000d,0016,0017,001b,0023,002b,002d,0031,0033,ff01_0905,0906,0904,0403,0503,0603,0807,0808,081a,081b,081c,0809,080a,080b,0804,0805,0806,0401,0501,0601,0303,0301,0302,0402,0502,0602
JA4_o (sample)t13d1714h1_fd0eb050439a_fb7b8c484e6d
JA4_ro (sample)t13d1714h1_1302,1303,1301,c02c,c030,c02b,c02f,cca9,cca8,c024,c028,c023,c027,009f,009e,006b,0067_ff01,0000,000b,000a,0023,0010,0016,0017,0031,000d,002b,002d,0033,001b_0905,0906,0904,0403,0503,0603,0807,0808,081a,081b,081c,0809,080a,080b,0804,0805,0806,0401,0501,0601,0303,0301,0302,0402,0502,0602

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
he11nn040000_5b1e8b5f4d2d_000000000000_0000000000002
ge11nn040000_5b1e8b5f4d2d_000000000000_0000000000001
ge11nn050000_ea6f06182064_000000000000_0000000000001

TCP SYN (p0f)

fingerprintco-occurrences
6:49+15:0:1440:mss*45,10:mss,sok,ts,nop,ws:flow:02
6:50+14:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:01
4:52+12:0:1400:65535,9:mss,sok,ts,nop,ws:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
64800_2-4-8-1-3_1440_102
64800_2-4-8-1-3_1440_71
65535_2-4-8-1-3_1400_91

User-Agent

fingerprintco-occurrences
csint.dev/1.0 (public research; contact via site)2
Mozilla/5.01
stealth-lab-trends/1.0 (by /u/manougv)1

Country

fingerprintco-occurrences
BE · Belgium2
JP · Japan1
MA · Morocco1

Network (ASN)

fingerprintco-occurrences
AS6848 · Telenet BV2
AS36884 · Wana Corporate1
AS2518 · BIGLOBE Inc.1