Where the DNS settings live
- Sign in and open your Control Panel → Domains.
- Click Manage on the domain, then Advanced DNS / Manage DNS.
Adding a record
- Scroll to the Advanced DNS section.
- Enter the hostname, type and destination in the blank row.
- Click Add.
Editing or deleting a record
- Use the pencil to edit a row, or the bin to delete, then confirm.
Changing the nameservers
- From the domain's management page choose Change Nameservers and enter the new values.
Gotchas at 123 Reg
- 123 Reg keeps separate screens for web forwarding, email and DNS — a forward can override an A record.
- Changes are typically live within an hour but the panel warns about 24 hours.
After you save
DNS changes aren't instant. Resolvers keep the old answer until the previous record's TTL expires, so a record with a 4-hour TTL can take 4 hours to change everywhere. Use the Route Planner's live check to see what the world sees, and the troubleshooting page if it still looks wrong after the TTL has passed.