Test of www.kosik.cz
E
Detailed results
DNS servers
DNS servers without IPv6. That is grade E.
www.kosik.cz
- ✓ ns2-01.azure-dns.net [2620:1ec:8ec:700::1] → m.sni.global.fastly.net
- ✓ ns3-01.azure-dns.org [2a01:111:4000:700::1] → m.sni.global.fastly.net
- ✓ ns4-01.azure-dns.info [2620:1ec:bda:700::1] → m.sni.global.fastly.net
- ✓ ns1-01.azure-dns.com [2603:1061:0:700::1] → m.sni.global.fastly.net
m.sni.global.fastly.net
- ✗ ns2.fastly.net [no IPv6]
- ✗ ns3.fastly.net [no IPv6]
- ✗ ns4.fastly.net [no IPv6]
- ✗ ns1.fastly.net [no IPv6]
Web servers
Website without IPv6. That is grade E/F.
E-mail servers
E-mails are deliverable over IPv6, great!
- ✓ kosik-cz.mail.protection.outlook.com [2a01:111:f403:ca04::d]
- ✓ kosik-cz.mail.protection.outlook.com [2a01:111:f403:ca09::9]
- ✓ kosik-cz.mail.protection.outlook.com [2a01:111:f403:ca09::d]
- ✓ kosik-cz.mail.protection.outlook.com [2a01:111:f403:ca04::6]
Last tests
| Test date | Grade |
|---|---|
| 20 Apr 2026 12:47 | E |