TLS ClientHello (JA4)
t13d0616h2_da75d768228b_7bfe479b1697
first seen 2026-10-09 13:46 · last seen 2026-10-09 13:46 · 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 | 6 |
| Extension count | 16 |
| ALPN | h2 |
| Ciphers | 1301, 1302, c02b, c02c, c02f, c030 |
| Extensions | 0005, 000a, 000b, 000d, 0012, 0017, 001b, 001c, 0022, 0023, 002b, 002d, 0033, ff01 |
| Signature algorithms | 0403, 0503, 0603, 0804, 0805, 0806, 0401, 0501, 0601 |
| JA4_r | t13d0616h2_1301,1302,c02b,c02c,c02f,c030_0005,000a,000b,000d,0012,0017,001b,001c,0022,0023,002b,002d,0033,ff01_0403,0503,0603,0804,0805,0806,0401,0501,0601 |
| JA4_o (sample) | t13d0616h2_6e19d326afc5_e1036952f821 |
| JA4_ro (sample) | t13d0616h2_1301,1302,c02b,c02f,c02c,c030_0000,0017,ff01,000a,000b,0023,0010,0005,0022,0012,0033,002b,000d,002d,001c,001b_0403,0503,0603,0804,0805,0806,0401,0501,0601 |
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 |
|---|---|
ge20nr10enus_b3034183f430_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 155.0.1, +27 more.The fingerprint page shows the full measured match list. More on the catalog. | 7 |
ge20nr11enus_3901d4197baf_000000000000_000000000000 | 2 |
HTTP/2 frames (Akamai)
| fingerprint | co-occurrences |
|---|---|
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:22|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0, firefox 153.0.3, firefox 155.0.1, +31 more.The fingerprint page shows the full measured match list. More on the catalog. | 2 |
1:65536;2:0;4:131072;5:16384|12517377|3:0:0:42|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 154.0, firefox 152.0.5, firefox 152.0.1, +3 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
1:65536;2:0;4:131072;5:16384|12517377|5:0:0:22|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0.3, firefox 154.0, firefox 153.0, +12 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
1:65536;2:0;4:131072;5:16384|12517377|7:0:0:22|m,p,a,s Match?Exact match in Thumbprint's published controlled catalog captures: firefox 153.0.3, firefox 155.0, firefox 154.0, +3 more.The fingerprint page shows the full measured match list. More on the catalog. | 1 |
1:65536;2:0;4:131072;5:16384|12517377|9:0:0:22|m,p,a,s | 1 |
1:65536;2:0;4:131072;5:16384|12517377|11:0:0:22|m,p,a,s | 1 |
1:65536;2:0;4:131072;5:16384|12517377|11:0:0:42|m,p,a,s | 1 |
1:65536;2:0;4:131072;5:16384|12517377|13:0:0:22|m,p,a,s | 1 |
TCP SYN (p0f)
| fingerprint | co-occurrences |
|---|---|
4:57+7:0:1460:mss*44,10:mss,sok,ts,nop,ws:df,id+:0 | 9 |
TCP SYN (JA4T)
| fingerprint | co-occurrences |
|---|---|
64240_2-4-8-1-3_1460_10 | 9 |
User-Agent
| fingerprint | co-occurrences |
|---|---|
Mozilla/5.0 (X11; Linux x86_64; rv:140.0) Gecko/20100101 Firefox/140.0 | 9 |
Country
| fingerprint | co-occurrences |
|---|---|
US · United States | 9 |
Network (ASN)
| fingerprint | co-occurrences |
|---|---|
AS199218 · Proton AG | 9 |