TLS ClientHello (JA4)

t13d2212h2_231e334592e8_36bf25f296df

first seen 2026-06-18 18:17 · last seen 2026-09-15 15:01 · JSON

Last 7 days (10 observations)

Distinct clients per day (last 30 days, peak 3/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 count22
Extension count12
ALPNh2
Ciphers002f, 0035, 003c, 003d, 009c, 009d, 009e, 009f, 1301, 1302, c009, c00a, c013, c014, c023, c024, c027, c028, c02b, c02c, c02f, c030
Extensions000a, 000b, 000d, 0017, 0023, 002b, 002d, 0031, 0033, ff01
Signature algorithms0804, 0805, 0806, 0401, 0501, 0201, 0403, 0503, 0203, 0202, 0601, 0603
JA4_rt13d2212h2_002f,0035,003c,003d,009c,009d,009e,009f,1301,1302,c009,c00a,c013,c014,c023,c024,c027,c028,c02b,c02c,c02f,c030_000a,000b,000d,0017,0023,002b,002d,0031,0033,ff01_0804,0805,0806,0401,0501,0201,0403,0503,0203,0202,0601,0603
JA4_o (sample)t13d2212h2_fd6997f2ee80_a5520a51e189
JA4_ro (sample)t13d2212h2_1302,1301,c02c,c02b,c030,c02f,009f,009e,c024,c023,c028,c027,c00a,c009,c014,c013,009d,009c,003d,003c,0035,002f_0000,002b,000d,0023,000a,000b,0010,0033,0031,0017,ff01,002d_0804,0805,0806,0401,0501,0201,0403,0503,0203,0202,0601,0603

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
ge20nn040000_272467e735d1_000000000000_00000000000012
ge20nn040000_200b94e8daef_000000000000_0000000000009
ge20nn040000_b293ea6c67e2_000000000000_0000000000007
ge20nn040000_4fc62b8ba0b7_000000000000_0000000000006
ge20nn040000_64de499ecc04_000000000000_0000000000006
ge20nn040000_89d3fd0d6813_000000000000_0000000000006
ge20nn040000_bd70857818a4_000000000000_0000000000005
ge20nn040000_ac162d8a7b0c_000000000000_0000000000005
ge20nn040000_53ef267af07a_000000000000_0000000000004
ge20nn040000_14e57ecc58b7_000000000000_0000000000004

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:65535|67043329|0|m,s,a,p109

TCP SYN (p0f)

fingerprintco-occurrences
4:114+14:0:1440:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:073
4:112+16:0:1440:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:015
4:113+15:0:1440:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:07
4:111+17:0:1440:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:04
4:110+18:0:1440:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:03
4:111+17:0:1440:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+:02
4:109+19:0:1440:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:02
4:110+18:0:1440:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:02
4:108+20:0:1440:mss*44,8:mss,nop,ws,nop,nop,sok:df,id+,ecn:01

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-1-3-1-1-4_1440_898

User-Agent

fingerprintco-occurrences
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; bingbot/2.0; +http://www.bing.com/bingbot.htm) Chrome/116.0.1938.76 Safari/537.36109

Country

fingerprintco-occurrences
US · United States109

Network (ASN)

fingerprintco-occurrences
AS8075 · Microsoft Corporation109