Test of gtbgroup.cz
F
Detailed results
DNS servers
The domain has all its DNS servers accessible over IPv6, great!
gtbgroup.cz
- ✓ dns101.ovh.net [2001:41d0:d00:fb00::2]
- ✓ ns101.ovh.net [2001:41d0:b00:f500::2]
Web servers
Website without IPv6. That is grade E/F.
E-mail servers
E-mail servers without IPv6. That is grade E/F.
- ✗ kerio2.gtb.cz [2a02:4a8:ac24:104::98:139] (not responding)
- ✗ mail.gtb.cz [2a02:2b88:1:4::d2] (not responding)
Last tests
| Test date | Grade |
|---|---|
| 26 Mar 2026 8:43 | F |