DNS is the directory that connects a business domain to its website, email and verification services. You do not need to memorise every record type, but you should know where DNS is hosted, who can change it and how to recover the current configuration.
A simple example
When someone visits www.example.co.uk, their device asks DNS where that name should go. A web record returns the relevant destination. When someone sends email to [email protected], MX records identify the receiving mail system. The same domain can therefore depend on several providers at once.
Registration, DNS and hosting are separate
| Service | Question it answers |
|---|---|
| Registrar | Who keeps the domain registered? |
| DNS provider | Which records direct traffic? |
| Web host | Where is the website served from? |
| Email provider | Where are mailboxes and messages handled? |
Why owners should care
- A nameserver change can replace the entire DNS zone.
- A web migration can work while email is broken.
- A departed supplier may still control the DNS account.
- Old TXT records can authorise services that are no longer used.
- Certificate and domain-verification processes often depend on DNS.
What to keep
Maintain the DNS provider login, an export or readable copy of records, a note explaining each important record and the date of the latest verified change. Store this outside the website itself.
A safe first action
Before asking anyone to “point the domain”, identify the current nameservers and copy the full zone. Then specify whether the required change is a single record or a full delegation.
A business-owner diagnostic question
When a supplier says “the domain is pointing incorrectly”, ask: Which hostname, which record type, which authoritative nameserver and what value should it return? A competent answer makes the proposed change reviewable. A vague request to “send the domain login” is not a change plan.
The owner does not need to perform every edit, but should be able to approve the scope, identify affected services and obtain evidence that the result works.
Final publication check
- The business can name the registrar, DNS host, web host and email provider.
- A supplier can describe a requested DNS change precisely.
- The current records are documented outside the provider.
- Owners know that a nameserver move can affect more than the website.
Sources and date checked
Technical and policy information was checked on 21 July 2026. Recheck provider-specific procedures before making a live change.
Keep the decision under your control
Retain the relevant accounts, source material, supplier terms and recovery information. Recheck changing prices, interfaces and rules before acting.