51.*
The name “51” exists in 72 top-level domains that dot.bi can see: 53 known from zone files, certificates or seed lists, 19 more answering DNS right now. Exact only for TLDs with an imported zone file.
Known registrations
| Domain | TLD | Known from | First observed | Hosting | Status |
|---|---|---|---|---|---|
| 51.app | .app | Zone file | 2026-10-13 | — | in zone |
| 51.fr | .fr | Zone file | 2026-10-13 | — | in zone |
| 51.org | .org | Zone file | 2026-10-13 | — | in zone |
| 51.shop | .shop | Zone file | 2026-10-13 | — | in zone |
| 51.site | .site | Zone file | 2026-10-13 | — | in zone |
| 51.xyz | .xyz | Zone file | 2026-10-13 | — | in zone |
| 51.actor | .actor | Zone file | 2026-10-13 | — | in zone |
| 51.agency | .agency | Zone file | 2026-10-13 | — | in zone |
| 51.bet | .bet | Zone file | 2026-10-13 | — | in zone |
| 51.bid | .bid | Zone file | 2026-10-13 | — | in zone |
| 51.box | .box | Zone file | 2026-10-13 | — | in zone |
| 51.ca | .ca | Majestic Million | 2026-10-13 | — | — |
| 51.cafe | .cafe | Zone file | 2026-10-13 | — | in zone |
| 51.chat | .chat | Zone file | 2026-10-13 | — | in zone |
| 51.com | .com | Majestic Million | 2026-10-13 | — | — |
| 51.cool | .cool | Zone file | 2026-10-13 | — | in zone |
| 51.dance | .dance | Zone file | 2026-10-13 | — | in zone |
| 51.dating | .dating | Zone file | 2026-10-13 | — | in zone |
| 51.digital | .digital | Zone file | 2026-10-13 | — | in zone |
| 51.dog | .dog | Zone file | 2026-10-13 | — | in zone |
| 51.ee | .ee | Zone file | 2026-10-13 | — | in zone |
| 51.energy | .energy | Zone file | 2026-10-13 | — | in zone |
| 51.engineering | .engineering | Zone file | 2026-10-13 | — | in zone |
| 51.estate | .estate | Zone file | 2026-10-13 | — | in zone |
| 51.fan | .fan | Zone file | 2026-10-13 | — | in zone |
| 51.farm | .farm | Zone file | 2026-10-13 | — | in zone |
| 51.feedback | .feedback | Zone file | 2026-10-13 | — | in zone |
| 51.fyi | .fyi | Zone file | 2026-10-13 | — | in zone |
| 51.games | .games | Zone file | 2026-10-13 | — | in zone |
| 51.gold | .gold | Zone file | 2026-10-13 | — | in zone |
| 51.group | .group | Zone file | 2026-10-13 | — | in zone |
| 51.holdings | .holdings | Zone file | 2026-10-13 | — | in zone |
| 51.icu | .icu | Zone file | 2026-10-13 | — | in zone |
| 51.la | .la | Majestic Million | 2026-10-13 | ACE | resolves |
| 51.life | .life | Zone file | 2026-10-13 | — | in zone |
| 51.live | .live | Zone file | 2026-10-13 | — | in zone |
| 51.loan | .loan | Zone file | 2026-10-13 | — | in zone |
| 51.mw | .mw | Zone file | 2026-10-13 | — | in zone |
| 51.net | .net | Majestic Million | 2026-10-13 | — | — |
| 51.network | .network | Zone file | 2026-10-13 | — | in zone |
| 51.new | .new | Zone file | 2026-10-13 | — | in zone |
| 51.photos | .photos | Zone file | 2026-10-13 | — | in zone |
| 51.plus | .plus | Zone file | 2026-10-13 | — | in zone |
| 51.school | .school | Zone file | 2026-10-13 | — | in zone |
| 51.sk | .sk | Zone file | 2026-10-13 | — | in zone |
| 51.solutions | .solutions | Zone file | 2026-10-13 | — | in zone |
| 51.studio | .studio | Zone file | 2026-10-13 | — | in zone |
| 51.tel | .tel | Zone file | 2026-10-13 | — | in zone |
| 51.ventures | .ventures | Zone file | 2026-10-13 | — | in zone |
| 51.win | .win | Zone file | 2026-10-13 | — | in zone |
| 51.world | .world | Zone file | 2026-10-13 | — | in zone |
| 51.xin | .xin | Zone file | 2026-10-13 | — | in zone |
| 51.zone | .zone | Zone file | 2026-10-13 | — | in zone |
Live DNS check on popular TLDs
Highlighted TLDs answered DNS. A grey TLD means no nameservers answered, which is not the same as “available”: registered names without DNS are invisible here.