First Seen Feb 26, 2015 · First Import Mar 19, 2015 · Last Import Nov 07, 2026 · Type generic · Operator Registry Services, LLC · DNSSEC Signed since before Sep 05, 2019
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 | 1794012989 |
| Refresh | 30 minutes |
| Retry | 5 minutes |
| Expire | 7 days |
| Minimum TTL | 30 minutes |
| Serial | First Seen | Last Seen |
|---|---|---|
| 1793923483 | Nov 06, 2026 | Nov 06, 2026 |
| 1793832654 | Nov 05, 2026 | Nov 05, 2026 |
| 1793753030 | Nov 04, 2026 | Nov 04, 2026 |
| 1793667961 | Nov 03, 2026 | Nov 03, 2026 |
| 1793581302 | Nov 02, 2026 | Nov 02, 2026 |
| 1793495050 | Nov 01, 2026 | Nov 01, 2026 |
| 1793407985 | Oct 31, 2026 | Oct 31, 2026 |
| 1793311918 | Oct 30, 2026 | Oct 30, 2026 |
| 1793234982 | Oct 29, 2026 | Oct 29, 2026 |
| 1793147971 | Oct 28, 2026 | Oct 28, 2026 |
Catch-all zone-file records indexed under this zone, by type.
Signed since before Sep 05, 2019. (zone file as of Nov 07, 2026)
Signed domains: 2,538 · DS records: 2,548 (as of Nov 07, 2026)
| Role | Algorithm | Public Key | First Seen |
|---|---|---|---|
| KSK | ECDSA P-256/SHA-256 | show0uc/4BTSsh7pyGoWED4+CltXga4P3jCMO7bV6lFp+BEz970YPmJcjyGFIwRhbhuObalu9R0SxPB+Dtl6mYd/og== |
Sep 23, 2026 |
| ZSK | ECDSA P-256/SHA-256 | showpDf03U3NEzii5dyfR+3E+eh1CDhdNHj+hDPJIeoEmm55J4i0jEfZuScbeUnV5U9TFWDtmLKPVZnSbGck0nlFIw== |
Sep 23, 2026 |
| Signs | Key Tag | Signer | Expires |
|---|---|---|---|
| SOA | 44297 | courses | Nov 21, 2026 |
| DNSKEY | 30039 | courses | Nov 17, 2026 |