TLS ClientHello (JA4)

t12d130600_2d7513195f68_021165082e1c

first seen 2026-06-11 14:41 · last seen 2026-09-12 21:16 · JSON

Last 7 days (5 observations)

Distinct clients per day (last 30 days, peak 4/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 version12
SNId (domain)
Cipher count13
Extension count6
ALPN00
Ciphers0005, 000a, 002f, 0035, c007, c009, c00a, c011, c012, c013, c014, c02b, c02f
Extensions0005, 000a, 000b, 000d, ff01
Signature algorithms0401, 0403, 0201, 0203
JA4_rt12d130600_0005,000a,002f,0035,c007,c009,c00a,c011,c012,c013,c014,c02b,c02f_0005,000a,000b,000d,ff01_0401,0403,0201,0203
JA4_o (sample)t12d130600_34ca9fd7c513_334f0aaed909
JA4_ro (sample)t12d130600_c02f,c02b,c011,c007,c013,c009,c014,c00a,0005,002f,0035,c012,000a_0000,0005,000a,000b,000d,ff01_0401,0403,0201,0203

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
ge11nr040000_e1d2031bdfea_000000000000_00000000000035
ge11nr040000_88d30a62b7ad_000000000000_00000000000023

TCP SYN (p0f)

fingerprintco-occurrences
4:53+11:0:1460:65535,9:mss,sok,ts,nop,ws:df,id+:012
4:55+9:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:012
4:51+13:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:09
4:52+12:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:06
4:50+14:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:05
4:53+11:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:04
4:49+15:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:03
4:56+8:0:1460:65535,9:mss,sok,ts,nop,ws:df,id+:03
4:54+10:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:02
4:51+13:0:1460:mss*22,7:mss,sok,ts,nop,ws:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_732
65535_2-4-8-1-3_1460_93

User-Agent

fingerprintco-occurrences
Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.6312.86 Safari/537.3635
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.190 Safari/537.3623

Country

fingerprintco-occurrences
NL · Netherlands30
US · United States28

Network (ASN)

fingerprintco-occurrences
AS202425 · IP Volume inc23
AS211680 · NSEC - Sistemas Informaticos, S.A.20
AS21859 · Zenlayer Inc15