TLS ClientHello (JA4)

t13d1410h2_c284ddd5f53f_560390466015

first seen 2026-08-17 22:55 · last seen 2026-10-12 14:11 · JSON

Distinct clients per day (last 30 days, peak 4/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 count10
ALPNh2
Ciphers002f, 0035, 009c, 009d, 1301, 1302, 1303, c013, c02b, c02c, c02f, c030, cca8, cca9
Extensions000a, 000b, 000d, 0017, 002b, 002d, 0033, ff01
Signature algorithms0403, 0804, 0401, 0503, 0805, 0501, 0806, 0601
JA4_rt13d1410h2_002f,0035,009c,009d,1301,1302,1303,c013,c02b,c02c,c02f,c030,cca8,cca9_000a,000b,000d,0017,002b,002d,0033,ff01_0403,0804,0401,0503,0805,0501,0806,0601
JA4_o (sample)t13d1410h2_42bf0cce36f0_c11ce78127c1
JA4_ro (sample)t13d1410h2_1301,1302,1303,c013,c02c,cca8,c02f,c02b,c030,cca9,002f,0035,009c,009d_0033,002b,002d,0017,ff01,000d,0010,000b,000a,0000_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_00000000000022

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144;4:1048576|15663105|1:0:0:256|m,a,s,p22

TCP SYN (p0f)

fingerprintco-occurrences
4:50+14:0:1460:65535,9:mss,sok,ts,nop,ws:df,id+:04
4:54+10:0:1460:32768,10:mss,nop,ws,sok,ts::02
4:53+11:0:1460:mss*29,11:mss,sok,ts,nop,ws:df,id+:01
4:48+16:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:53+11:0:1460: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
4:46+18:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:54+10:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:46+18:0:1460:mss*44,9:mss,nop,nop,sok,nop,ws:df,id+:01
4:50+14:0:1460:mss*29,11:mss,nop,nop,sok,nop,ws:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_75
65535_2-4-8-1-3_1460_94
64240_2-1-1-4-1-3_1460_93
32768_2-1-3-4-8_1460_103
42340_2-4-8-1-3_1460_111
62720_2-4-8-1-3_8960_71
64240_2-4-8-1-3_1460_91
42340_2-1-1-4-1-3_1460_111
62314_2-4-8-1-3_8902_121
42340_2-1-1-4-1-3_1460_101

User-Agent

fingerprintco-occurrences
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.3 Safari/537.36 Edg/134.0.0.34
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.6 Safari/537.363
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.6 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.4 Safari/537.362
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.14 Safari/605.1.152
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.9 Safari/605.1.152
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.7 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.4 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.1 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.9 Safari/537.36 Edg/135.0.0.91

Country

fingerprintco-occurrences
DE · Germany7
NL · Netherlands4
SE · Sweden3
AT · Austria3
US · United States1
CH · Switzerland1
FR · France1
ES · Spain1
IT · Italy1

Network (ASN)

fingerprintco-occurrences
AS60729 · Stiftung Erneuerbare Freiheit5
AS215125 · Church of Cyberology3
AS208323 · Foundation for Applied Privacy3
AS53667 · FranTech Solutions1
AS198093 · Foreningen for digitala fri- och rattigheter1
AS197540 · netcup GmbH1
AS63023 · GTHost1
AS214503 · QuxLabs AB1
AS41281 · KeFF Networks Ltd1
AS213873 · OUIDO Hosting1