TLS ClientHello (JA4)

t13d0911h2_96eda151f526_9ced094328c9

first seen 2026-08-18 06:26 · last seen 2026-08-18 06:26 · 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 count9
Extension count11
ALPNh2
Ciphers1301, 1302, 1303, c013, c014, c02b, c02c, c02f, cca8
Extensions000a, 000b, 000d, 0017, 0023, 002b, 002d, 0033, ff01
Signature algorithms0403, 0804, 0401, 0503, 0805, 0501, 0806, 0601
JA4_rt13d0911h2_1301,1302,1303,c013,c014,c02b,c02c,c02f,cca8_000a,000b,000d,0017,0023,002b,002d,0033,ff01_0403,0804,0401,0503,0805,0501,0806,0601
JA4_o (sample)t13d0911h2_1905357d013b_d35976f775f5
JA4_ro (sample)t13d0911h2_1301,1302,1303,c02f,c014,c013,cca8,c02c,c02b_ff01,0017,000a,002b,0000,000b,002d,0033,0023,0010,000d_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_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144;4:1048576|15663105|1:0:0:256|m,a,s,p1

TCP SYN (p0f)

fingerprintco-occurrences
4:48+16:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_71

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.4 Safari/537.361

Country

fingerprintco-occurrences
IS · Iceland1

Network (ASN)

fingerprintco-occurrences
AS44925 · 1984 ehf1