First Seen Feb 26, 2015 · First Import Mar 19, 2015 · Last Import Sep 10, 2026 · Type generic · Operator Registry Services, LLC · DNSSEC Signed since Apr 10, 2020
Also indexed as: Domain Nameserver
| Name | First Seen | Domains |
|---|---|---|
| z.nic.courses | Dec 02, 2022 | 2 |
| x.nic.courses | Dec 02, 2022 | 2 |
| y.nic.courses | Dec 02, 2022 | 2 |
| b.nic.courses | Feb 26, 2015 | 2 |
| a.nic.courses | Feb 26, 2015 | 2 |
| c.nic.courses | Feb 26, 2015 | 2 |
| Name | First Seen | Last Seen | Domains |
|---|---|---|---|
| d.nic.courses | Feb 26, 2015 | Dec 01, 2022 | 0 |
| Primary NS | a.nic.courses |
|---|---|
| Mailbox | admin.tldns.godaddy. |
| Serial | 1789001942 |
| Refresh | 30 minutes |
| Retry | 5 minutes |
| Expire | 7 days |
| Minimum TTL | 30 minutes |
| Serial | First Seen | Last Seen |
|---|---|---|
| 1788909854 | Sep 09, 2026 | Sep 09, 2026 |
| 1788829269 | Sep 08, 2026 | Sep 08, 2026 |
| 1788740945 | Sep 07, 2026 | Sep 07, 2026 |
| 1788651823 | Sep 06, 2026 | Sep 06, 2026 |
| 1788570307 | Sep 05, 2026 | Sep 05, 2026 |
| 1788480198 | Sep 04, 2026 | Sep 04, 2026 |
| 1788392939 | Sep 03, 2026 | Sep 03, 2026 |
| 1788310201 | Sep 02, 2026 | Sep 02, 2026 |
| 1788216403 | Sep 01, 2026 | Sep 01, 2026 |
| 1788138033 | Aug 31, 2026 | Aug 31, 2026 |
Catch-all zone-file records indexed under this zone, by type.
Signed since Apr 10, 2020.
Signed domains: 2,352 · DS records: 2,361 (as of Sep 10, 2026)
| Role | Algorithm | Public Key | First Seen |
|---|---|---|---|
| KSK | RSA/SHA-256 | showAwEAAbfLi1BzFG41Ds2T6xe8yBFFMxaGPli48fiWl6l8fGE0ivbmvEBcDni99Mp9/BtYgehWqSHH0M49xVY5sQeOc+g8KS96cLTqPpObq3xphqlFLcHvmcwX6u9zPqpT/sVzgEot0UAnUMcki00rNZZUOfKkuw6j1/AFJGsNUd+IDreiH8q0bfEswaOPACNHirnHBXMfSXYjSiMiZR5UQIpdbnWeb68NhjnS14jQYSmSol8heYQPagw8oGapPyYb31dCwxXcuvR19xGOzoBvLOdN+wiWAsZkFAmlBTAK8w8l2MW2b9bgwcn0rxNxaRdt9G1t7H6/NFKhfSoa4seGNQgux/c= |
Jul 12, 2023 |
| ZSK | RSA/SHA-256 | showAwEAAbGDt/BukZ69+XPQLZGcMa0pV6a7pjKedPt/ii8y2qdlbJQUf19CL5qdnOcbAzv8jLZi7TCJLaZxboLfyjP6fWF+xJPG+SkXE1UdJUjuVeqUC8iV3igRJ4BnxKL893oVxxXpH8m1nkAg0xHlJy0u2F1LZYu4b64cDAz1VrE+76o/wXROiwabb8fXo2ggcFglkyj+/wN0wcBgh444Ged6CmU= |
Mar 15, 2022 |
| Signs | Key Tag | Signer | Expires |
|---|---|---|---|
| SOA | 27045 | courses | Sep 24, 2026 |
| DNSKEY | 15277 | courses | Sep 22, 2026 |