TLS ClientHello (JA4)

t13d221100_889453b98ca2_22fc8fde950b

first seen 2026-10-19 14:21 · last seen 2026-10-19 14:21 · 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 count22
Extension count11
ALPN00
Ciphers002f, 0035, 003c, 003d, 009c, 009d, 00ff, 1301, 1302, 1303, c009, c00a, c013, c014, c023, c024, c027, c028, c02b, c02c, c02f, c030
Extensions0005, 000a, 000b, 000d, 0015, 0017, 0023, 002b, 002d, 0033
Signature algorithms0804, 0805, 0806, 0401, 0501, 0201, 0403, 0503, 0203, 0202, 0601, 0603
JA4_rt13d221100_002f,0035,003c,003d,009c,009d,00ff,1301,1302,1303,c009,c00a,c013,c014,c023,c024,c027,c028,c02b,c02c,c02f,c030_0005,000a,000b,000d,0015,0017,0023,002b,002d,0033_0804,0805,0806,0401,0501,0201,0403,0503,0203,0202,0601,0603
JA4_o (sample)t13d221100_57910ce2a342_8f393b195447
JA4_ro (sample)t13d221100_1302,1303,1301,c02c,c02b,c030,c02f,c024,c023,c028,c027,c00a,c009,c014,c013,009d,009c,003d,003c,0035,002f,00ff_0000,000b,000a,0023,0005,0017,000d,002b,002d,0033,0015_0804,0805,0806,0401,0501,0201,0403,0503,0203,0202,0601,0603

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_0d34275228c4_000000000000_0000000000001
ge11nn040000_68ea680901ae_000000000000_0000000000001

TCP SYN (p0f)

fingerprintco-occurrences
6:44+20:0:1440:65535,8:mss,nop,ws,nop,nop,sok:flow:02

TCP SYN (JA4T)

fingerprintco-occurrences
65535_2-1-3-1-1-4_1440_82

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/155.0.0.0 Safari/537.362

Country

fingerprintco-occurrences
CH · Switzerland2

Network (ASN)

fingerprintco-occurrences
AS3303 · Swisscom (Switzerland) Ltd2

TLS supported groups

fingerprintco-occurrences
001d,0017,0018 Match?Exact match in Thumbprint's published controlled catalog captures: rust-reqwest 0.12.28, rust-reqwest 0.11.27, powershell 7.6.8, +1 more.The fingerprint page shows the full measured match list. More on the catalog.2