TLS ClientHello (JA4)

t13d1410h2_ec45a0f89deb_560390466015

first seen 2026-08-17 22:39 · last seen 2026-10-10 20:46 · 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 count10
ALPNh2
Ciphers002f, 0035, 009c, 009d, 1301, 1302, 1303, c013, c014, c02b, c02c, c02f, c030, 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,c014,c02b,c02c,c02f,c030,cca9_000a,000b,000d,0017,002b,002d,0033,ff01_0403,0804,0401,0503,0805,0501,0806,0601
JA4_o (sample)t13d1410h2_c6dbe5dbb981_dd8521e39882
JA4_ro (sample)t13d1410h2_1301,1302,1303,cca9,c02b,009c,c014,c013,0035,c030,c02f,009d,c02c,002f_000d,000a,000b,0000,0033,002d,0017,0010,ff01,002b_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_00000000000016

HTTP/2 frames (Akamai)

fingerprintco-occurrences
1:65536;2:0;4:6291456;6:262144;4:1048576|15663105|1:0:0:256|m,a,s,p16

TCP SYN (p0f)

fingerprintco-occurrences
4:50+14:0:1460:65535,9:mss,sok,ts,nop,ws:df,id+:03
4:54+10:0:1460:32768,10:mss,nop,ws,sok,ts::03
4:50+14:0:1460:32768,10:mss,nop,ws,sok,ts::02
4:47+17:0:1460:mss*44,10: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
4:40+24:0:1460: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
4:53+11:0:8902:mss*7,12:mss,sok,ts,nop,ws:df,id+,ecn:01
4:49+15:0:1460:32768,10:mss,nop,ws,sok,ts::01

TCP SYN (JA4T)

fingerprintco-occurrences
32768_2-1-3-4-8_1460_106
64240_2-4-8-1-3_1460_74
65535_2-4-8-1-3_1460_93
64240_2-4-8-1-3_1460_101
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/135.0.0.0 Safari/537.364
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.2 Safari/605.1.152
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/134.0.0.0 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.6 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 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.6 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/134.0.0.7 Safari/537.361
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.8 Safari/537.361

Country

fingerprintco-occurrences
NL · Netherlands7
DE · Germany4
SE · Sweden2
US · United States1
RO · Romania1
DK · Denmark1

Network (ASN)

fingerprintco-occurrences
AS215125 · Church of Cyberology6
AS60729 · Stiftung Erneuerbare Freiheit3
AS27284 · Fourplex Telecom LLC1
AS211507 · Julian Achter1
AS214503 · QuxLabs AB1
AS41281 · KeFF Networks Ltd1
AS205100 · F3 Netze e.V.1
AS200651 · FlokiNET ehf1
AS57860 · Zencurity ApS1