TLS ClientHello (JA4)

t13d1410h2_481016f108dd_560390466015

first seen 2026-07-24 09:51 · last seen 2026-08-18 06:43 · JSON

Distinct clients per day (last 30 days, peak 11/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, 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,c014,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_b99eb3f3ca73_4aa485c159a4
JA4_ro (sample)t13d1410h2_1301,1302,1303,cca8,002f,c02c,009c,c013,009d,cca9,0035,c030,c014,c02f_000d,000b,000a,0010,0000,002b,002d,0017,0033,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_00000000000013
ge20nn010000_379fadc6c8b7_000000000000_0000000000001

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
1:65536;2:0;4:6291456;6:262144|15663105|1:0:0:256|m,a,s,p1

TCP SYN (p0f)

fingerprintco-occurrences
4:54+10:0:1460:32768,10:mss,nop,ws,sok,ts::04
4:55+9:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:02
4:50+14:0:1460:65535,9:mss,sok,ts,nop,ws:df,id+:02
4:48+16:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:47+17:0:1460: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
4:54+10:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
6:55+9:0:1440:mss*45,7:mss,sok,ts,nop,ws:flow:01
4:53+11:0:8902:mss*7,12:mss,sok,ts,nop,ws:df,id+,ecn:01

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_76
32768_2-1-3-4-8_1460_104
65535_2-4-8-1-3_1460_92
64800_2-4-8-1-3_1440_71
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/135.0.0.3 Safari/537.362
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36 Edg/135.0.0.01
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.5 Safari/537.361
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/134.0.0.5 Safari/537.361
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) 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/135.0.0.5 Safari/537.36 Edg/135.0.0.51
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 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.6 Safari/537.361
Mozilla/5.0 (X11; CrOS x86_64 14541.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.2 Safari/537.361

Country

fingerprintco-occurrences
NL · Netherlands6
DE · Germany2
US · United States2
SE · Sweden2
AU · Australia1
RO · Romania1

Network (ASN)

fingerprintco-occurrences
AS215125 · Church of Cyberology4
AS60729 · Stiftung Erneuerbare Freiheit2
AS27284 · Fourplex Telecom LLC2
AS12876 · Scaleway SAS1
AS141995 · Contabo Asia Private Limited1
AS214503 · QuxLabs AB1
AS60404 · Liteserver1
AS214379 · South Park Networks LLC1
AS200651 · FlokiNET ehf1