TLS ClientHello (JA4)

t13d1410h2_15c1305fa4d5_560390466015

first seen 2026-08-18 01:28 · last seen 2026-10-12 00:39 · 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 count14
Extension count10
ALPNh2
Ciphers002f, 009c, 009d, 1301, 1302, 1303, c013, c014, 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,009c,009d,1301,1302,1303,c013,c014,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_99b1c7a75494_77a456095efa
JA4_ro (sample)t13d1410h2_1301,1302,1303,c02c,c013,cca8,009d,002f,c030,cca9,c014,c02f,009c,c02b_0010,002b,0017,000a,000b,0033,0000,ff01,000d,002d_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_00000000000013

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144;4:1048576|15663105|1:0:0:256|m,a,s,p13

TCP SYN (p0f)

fingerprintco-occurrences
4:51+13:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:02
4:46+18:0:1460:mss*44,9:mss,nop,nop,sok,nop,ws:df,id+:02
4:53+11:0:1460:mss*29,11:mss,sok,ts,nop,ws:df,id+:01
4:46+18:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:55+9:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:54+10:0:1460:mss*29,11:mss,sok,ts,nop,ws:df,id+:01
4:50+14:0:1460:mss*29,11:mss,nop,nop,sok,nop,ws:df,id+:01
4:53+11:0:8902:mss*7,12:mss,sok,ts,nop,ws:df,id+,ecn:01
4:55+9:0:1460:mss*29,10:mss,nop,nop,sok,nop,ws:df,id+:01
4:54+10:0:1460:32768,10:mss,nop,ws,sok,ts::01

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_74
42340_2-4-8-1-3_1460_112
64240_2-1-1-4-1-3_1460_92
32768_2-1-3-4-8_1460_102
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 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.8 Safari/537.364
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.103 Safari/537.36 Edge/18.195822
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.9 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.1 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.4 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.9 Safari/537.36 Edg/134.0.0.91
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.9 Safari/537.361
Mozilla/5.0 (X11; CrOS x86_64 14541.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.7 Safari/537.361
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/132.0.0.2 Safari/537.36 OPR/117.0.0.21

Country

fingerprintco-occurrences
DE · Germany3
US · United States3
SE · Sweden3
NL · Netherlands2
AT · Austria2

Network (ASN)

fingerprintco-occurrences
AS215125 · Church of Cyberology2
AS197540 · netcup GmbH2
AS208323 · Foundation for Applied Privacy2
AS62744 · Quintex Alliance Consulting2
AS60729 · Stiftung Erneuerbare Freiheit1
AS27284 · Fourplex Telecom LLC1
AS198093 · Foreningen for digitala fri- och rattigheter1
AS214503 · QuxLabs AB1
AS41281 · KeFF Networks Ltd1