TLS ClientHello (JA4)

t13d1811h1_5d04281c6031_78e6aca7449b

first seen 2026-10-18 16:12 · last seen 2026-10-18 16:12 · 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 count18
Extension count11
ALPNh1
Ciphers002f, 0035, 009c, 009d, 1301, 1302, 1303, c009, c00a, c013, c014, c027, c02b, c02c, c02f, c030, cca8, cca9
Extensions000a, 000b, 000d, 0017, 0023, 002b, 002d, 0033, ff01
Signature algorithms0403, 0804, 0401, 0503, 0805, 0501, 0806, 0601, 0201
JA4_rt13d1811h1_002f,0035,009c,009d,1301,1302,1303,c009,c00a,c013,c014,c027,c02b,c02c,c02f,c030,cca8,cca9_000a,000b,000d,0017,0023,002b,002d,0033,ff01_0403,0804,0401,0503,0805,0501,0806,0601,0201
JA4_o (sample)t13d1811h1_04134bd58ce0_9a792e03497a
JA4_ro (sample)t13d1811h1_1301,1302,1303,c02f,c02b,c030,c02c,c027,cca9,cca8,c009,c013,c00a,c014,009c,009d,002f,0035_0000,0017,ff01,000a,000b,0023,0010,000d,0033,002d,002b_0403,0804,0401,0503,0805,0501,0806,0601,0201

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
ge11nr040000_e1d2031bdfea_000000000000_0000000000001

TCP SYN (p0f)

fingerprintco-occurrences
4:119+9:0:1460:65535,8:mss,nop,ws,nop,nop,sok:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-1-1-4_1460_81

User-Agent

fingerprintco-occurrences
Bun/1.4.31

Country

fingerprintco-occurrences
HK · Hong Kong SAR China1

Network (ASN)

fingerprintco-occurrences
AS9269 · Hong Kong Broadband Network Ltd.1

TLS supported groups

fingerprintco-occurrences
11ec,001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: chrome 155.0.8059.40, chrome 156.0.8078.73, chromium 156.0.8078.47, +8 more.The fingerprint page shows the full measured match list. More on the catalog.1