TLS ClientHello (JA4)

t13d1310h2_d97deddc4f1c_560390466015

first seen 2026-08-18 07:10 · last seen 2026-10-11 23:01 · 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 count13
Extension count10
ALPNh2
Ciphers002f, 0035, 009c, 009d, 1301, 1302, 1303, c013, c014, c02b, c02c, c02f, cca9
Extensions000a, 000b, 000d, 0017, 002b, 002d, 0033, ff01
Signature algorithms0403, 0804, 0401, 0503, 0805, 0501, 0806, 0601
JA4_rt13d1310h2_002f,0035,009c,009d,1301,1302,1303,c013,c014,c02b,c02c,c02f,cca9_000a,000b,000d,0017,002b,002d,0033,ff01_0403,0804,0401,0503,0805,0501,0806,0601
JA4_o (sample)t13d1310h2_4f3568b10bf5_ece9ae6153be
JA4_ro (sample)t13d1310h2_1301,1302,1303,cca9,009c,c014,009d,c02f,c02b,0035,002f,c013,c02c_002b,0010,0017,000a,ff01,000b,002d,0000,000d,0033_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
4:50+14:0:1460:mss*29,11:mss,sok,ts,nop,ws:df,id+:01
4:55+9:0:1460:mss*29,10:mss,nop,nop,sok,nop,ws:df,id+:01
4:53+11:0:9174:mss*4,10:mss,nop,ws:df,id+,ecn:01

TCP SYN (JA4T)

fingerprintco-occurrences
42340_2-4-8-1-3_1460_111
42340_2-1-1-4-1-3_1460_101
36696_2-1-3_9174_101

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.3 Safari/537.36 Edg/135.0.0.31
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.9 Safari/537.36 Edg/133.0.0.91

Country

fingerprintco-occurrences
DE · Germany1
US · United States1
SE · Sweden1

Network (ASN)

fingerprintco-occurrences
AS60729 · Stiftung Erneuerbare Freiheit1
AS41281 · KeFF Networks Ltd1
AS400226 · StormyCloud Inc1