| Hostname | Type | TTL | Priority | Content |
|---|---|---|---|---|
| 21stcenturyoptics.com | SOA | 3600 | costello.essilor.net hostmaster@essilor.net 2015062748 1200 600 604800 3600 | |
| 21stcenturyoptics.com | NS | 3600 | costello.essilor.net | |
| 21stcenturyoptics.com | NS | 3600 | abbott.essilor.net | |
| 21stcenturyoptics.com | A | 3600 | 216.117.135.193 | |
| 21stcenturyoptics.com | MX | 300 | 0 | 21stcenturyoptics-com.mail.protection.outlook.com |
| www.21stcenturyoptics.com | A | 3600 | 216.117.135.193 |