TLS ClientHello (JA4)

t13d1411h2_4f2acddecbd5_9ced094328c9

first seen 2026-08-17 22:33 · last seen 2026-08-18 19:03 · JSON

Distinct clients per day (last 30 days, peak 5/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, 0017, 0023, 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,0017,0023,002b,002d,0033,ff01_0403,0804,0401,0503,0805,0501,0806,0601
JA4_o (sample)t13d1411h2_f9bba455784f_59f5f64f227f
JA4_ro (sample)t13d1411h2_1301,1302,1303,009c,c030,009d,cca9,0035,c02b,c014,cca8,c013,c02f,002f_002b,0010,0017,000a,0000,000b,0033,002d,000d,ff01,0023_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_0000000000009

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144;4:1048576|15663105|1:0:0:256|m,a,s,p9

TCP SYN (p0f)

fingerprintco-occurrences
4:54+10:0:1460:32768,10:mss,nop,ws,sok,ts::02
4:51+13:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:55+9:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:46+18:0:1460:mss*44,11:mss,sok,ts,nop,ws:df,id+:01
4:50+14:0:1460:65535,9:mss,sok,ts,nop,ws:df,id+:01
4:52+12:0:1400: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
4:53+11:0:1460:65535,9:mss,nop,ws,sok,ts:df:01

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_72
32768_2-1-3-4-8_1460_102
64240_2-4-8-1-3_1460_111
65535_2-4-8-1-3_1460_91
64240_2-4-8-1-3_1400_71
42340_2-1-1-4-1-3_1460_101
65535_2-1-3-4-8_1460_91

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.1 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.8 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.2 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.8 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.7 Safari/537.36 Edg/135.0.0.71
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.9 Safari/537.361

Country

fingerprintco-occurrences
NL · Netherlands3
DE · Germany2
SE · Sweden2
NO · Norway1
CH · Switzerland1

Network (ASN)

fingerprintco-occurrences
AS215125 · Church of Cyberology2
AS56655 · Gigahost AS1
AS60729 · Stiftung Erneuerbare Freiheit1
AS12876 · Scaleway SAS1
AS53667 · FranTech Solutions1
AS198093 · Foreningen for digitala fri- och rattigheter1
AS197540 · netcup GmbH1
AS41281 · KeFF Networks Ltd1