TLS ClientHello (JA4)

t13d0812h2_3614c3f508de_cbb9361b6bf9

first seen 2026-08-18 01:56 · last seen 2026-08-18 15:19 · JSON

Distinct clients per day (last 30 days, peak 3/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 count8
Extension count12
ALPNh2
Ciphers0035, 009c, 1301, 1302, 1303, c02c, c02f, c030
Extensions000a, 000b, 000d, 0015, 0017, 0023, 002b, 002d, 0033, ff01
Signature algorithms0403, 0804, 0401, 0503, 0805, 0501, 0806, 0601
JA4_rt13d0812h2_0035,009c,1301,1302,1303,c02c,c02f,c030_000a,000b,000d,0015,0017,0023,002b,002d,0033,ff01_0403,0804,0401,0503,0805,0501,0806,0601
JA4_o (sample)t13d0812h2_bfa3c6020c7b_e6e2db3ff55b
JA4_ro (sample)t13d0812h2_1301,1302,1303,c030,009c,c02c,0035,c02f_002b,000b,0033,0010,000d,0023,ff01,002d,0000,000a,0017,0015_0403,0804,0401,0503,0805,0501,0806,0601

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
ge20nn04enus_989c7cc05c9b_000000000000_0000000000003

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144;4:1048576|15663105|1:0:0:256|m,a,s,p3

TCP SYN (p0f)

fingerprintco-occurrences
4:55+9:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:02
4:47+17:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_73

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.2 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.6 Safari/537.36 Edg/135.0.0.61

Country

fingerprintco-occurrences
SE · Sweden2
NL · Netherlands1

Network (ASN)

fingerprintco-occurrences
AS198093 · Foreningen for digitala fri- och rattigheter2
AS12876 · Scaleway SAS1