TLS ClientHello (JA4)

t13d1410h2_c284ddd5f53f_560390466015

first seen 2026-08-17 22:55 · last seen 2026-08-18 19:15 · JSON

Distinct clients per day (last 30 days, peak 8/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_bb1da79485dd_55249fc5420b
JA4_ro (sample)t13d1410h2_1301,1302,1303,c02f,c02b,002f,c02c,c030,cca9,cca8,0035,009d,009c,c013_000a,000b,0017,0033,002d,000d,0010,002b,0000,ff01_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_00000000000010

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144;4:1048576|15663105|1:0:0:256|m,a,s,p10

TCP SYN (p0f)

fingerprintco-occurrences
4:50+14:0:1460:65535,9:mss,sok,ts,nop,ws:df,id+:02
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
4:46+18:0:1460:mss*44,9: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
4:57+7:0:1460:mss*44,9:mss,sok,ts,nop,ws:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_72
65535_2-4-8-1-3_1460_92
32768_2-1-3-4-8_1460_102
42340_2-4-8-1-3_1460_111
64240_2-4-8-1-3_1460_91
64240_2-1-1-4-1-3_1460_91
62314_2-4-8-1-3_8902_121

User-Agent

fingerprintco-occurrences
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 (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
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.3 Safari/537.36 Edg/134.0.0.31
Mozilla/5.0 (X11; CrOS x86_64 14541.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/133.0.0.5 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/126.0.0.4 Safari/537.361
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.6 Safari/537.361

Country

fingerprintco-occurrences
DE · Germany3
NL · Netherlands3
SE · Sweden1
ES · Spain1
IT · Italy1
AT · Austria1

Network (ASN)

fingerprintco-occurrences
AS60729 · Stiftung Erneuerbare Freiheit2
AS215125 · Church of Cyberology2
AS197540 · netcup GmbH1
AS63023 · GTHost1
AS214503 · QuxLabs AB1
AS208323 · Foundation for Applied Privacy1
AS44592 · SkyLink Data Center BV1
AS214094 · OSSERVATORIO NESSUNO1