TLS ClientHello (JA4)
t13d1211h2_bc7c73178a52_b11bb3600f94
first seen 2026-09-25 21:05 · last seen 2026-10-10 12:42 · JSON
Distinct clients per day (last 30 days, peak 1/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
| Protocol | t (TLS over TCP) |
|---|---|
| TLS version | 13 |
| SNI | d (domain) |
| Cipher count | 12 |
| Extension count | 11 |
| ALPN | h2 |
| Ciphers | 002f, 0035, 009c, 009d, 1301, 1302, 1303, c013, c014, c02b, c02c, c02f |
| Extensions | 000a, 000b, 000d, 0015, 0017, 002b, 002d, 0033, ff01 |
| Signature algorithms | 0403, 0804, 0401, 0503, 0805, 0501, 0806, 0601 |
| JA4_r | t13d1211h2_002f,0035,009c,009d,1301,1302,1303,c013,c014,c02b,c02c,c02f_000a,000b,000d,0015,0017,002b,002d,0033,ff01_0403,0804,0401,0503,0805,0501,0806,0601 |
| JA4_o (sample) | t13d1211h2_e216c7596dd9_efa94fb78503 |
| JA4_ro (sample) | t13d1211h2_1301,1302,1303,c014,c013,009c,c02f,0035,c02b,002f,009d,c02c_0010,002d,0000,000b,000d,002b,000a,ff01,0033,0017,0015_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)
| fingerprint | co-occurrences |
|---|---|
ge20nn04enus_989c7cc05c9b_000000000000_000000000000 | 2 |
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
1:65536;2:0;4:6291456;6:262144;4:1048576|15663105|1:0:0:256|m,a,s,p | 2 |
TCP SYN (p0f)
| fingerprint | co-occurrences |
|---|---|
4:51+13:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:0 | 1 |
4:48+16:0:1460:mss*44,9:mss,nop,nop,sok,nop,ws:df,id+:0 | 1 |
TCP SYN (JA4T)
| fingerprint | co-occurrences |
|---|---|
64240_2-4-8-1-3_1460_7 | 1 |
64240_2-1-1-4-1-3_1460_9 | 1 |
User-Agent
| fingerprint | co-occurrences |
|---|---|
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.3 Safari/537.36 | 2 |
Country
| fingerprint | co-occurrences |
|---|---|
US · United States | 1 |
AT · Austria | 1 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS208323 · Foundation for Applied Privacy | 1 |
AS62744 · Quintex Alliance Consulting | 1 |