| Hostname | Type | TTL | Priority | Content |
|---|---|---|---|---|
| 21stcentury.com | SOA | 21600 | master.dns.rcn.net hostmaster@rcn.com 2025020701 10800 3600 604800 86400 | |
| 21stcentury.com | NS | 21600 | auth3.dns.rcn.net | |
| 21stcentury.com | NS | 21600 | auth4.dns.rcn.net | |
| 21stcentury.com | NS | 21600 | auth1.dns.rcn.net | |
| 21stcentury.com | NS | 21600 | auth2.dns.rcn.net | |
| 21stcentury.com | MX | 21600 | 10 | mail.greatemailideas.net |