TLS ClientHello (JA4)

t13d1411h2_4f2acddecbd5_b11bb3600f94

first seen 2026-08-18 20:04 · last seen 2026-10-11 08:18 · JSON

Distinct clients per day (last 30 days, peak 2/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 count14
Extension count11
ALPNh2
Ciphers002f, 0035, 009c, 009d, 1301, 1302, 1303, c013, c014, c02b, c02f, c030, cca8, cca9
Extensions000a, 000b, 000d, 0015, 0017, 002b, 002d, 0033, ff01
Signature algorithms0403, 0804, 0401, 0503, 0805, 0501, 0806, 0601
JA4_rt13d1411h2_002f,0035,009c,009d,1301,1302,1303,c013,c014,c02b,c02f,c030,cca8,cca9_000a,000b,000d,0015,0017,002b,002d,0033,ff01_0403,0804,0401,0503,0805,0501,0806,0601
JA4_o (sample)t13d1411h2_9d9c9d3f632d_2c7f7bd3703f
JA4_ro (sample)t13d1411h2_1301,1302,1303,c014,009d,c02b,0035,c02f,c013,cca9,002f,009c,cca8,c030_000d,000b,0000,0010,ff01,0033,002b,002d,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_0000000000006

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144;4:1048576|15663105|1:0:0:256|m,a,s,p6

TCP SYN (p0f)

fingerprintco-occurrences
4:50+14:0:1460:mss*29,11:mss,nop,nop,sok,nop,ws:df,id+:02
4:48+16:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:50+14:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:52+12:0:1460:mss*44,7: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

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_73
42340_2-1-1-4-1-3_1460_112
42340_2-1-1-4-1-3_1460_101

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.8 Safari/537.364
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.9 Safari/537.362

Country

fingerprintco-occurrences
DE · Germany2
US · United States2
SE · Sweden1
UA · Ukraine1

Network (ASN)

fingerprintco-occurrences
AS60729 · Stiftung Erneuerbare Freiheit2
AS30860 · Virtual Systems LLC1
AS41281 · KeFF Networks Ltd1
AS62744 · Quintex Alliance Consulting1
AS924 · Cloudie Networks LLC1