A domain name is the address people type, DNS is the directory that turns that address into a server, and your registrar is the company that holds your right to use the name. Keep these three separate in your head and most website mysteries become simple. The commonest business risk is not technical. It is an expired or badly owned domain.
Three different things
| Thing | What it is | Who provides it |
|---|---|---|
| Domain registration | Your right to use a name for a set period | A registrar, via a registry |
| DNS | The records that say where the name points | A DNS host, often the registrar, hosting company or a separate service |
| Web hosting | The server or service that stores and serves the site | A hosting provider |
They can all come from one company or from three. That flexibility is useful and a common source of confusion when something breaks.
You rent a domain, you do not buy it
MDN’s guide to domain names says you cannot buy a domain name. You pay a registrar for the right to use it for one or more years, and you can renew that right. Renewals take priority over other people’s applications, but you never own the name. It also advises entering a valid real-world address when registering, because registrars in some countries may be forced to close a domain without one, and checking the spelling carefully because it is too late to fix once it is paid for.
How DNS works
MDN’s DNS glossary entry describes DNS as a hierarchical, decentralised naming system that translates human-friendly domain names into numeric IP addresses. In the domain guide’s description, your computer checks its local cache, then asks a DNS server for the address, then connects the browser to the web server at that address.
DNS servers cache records and refresh them periodically. When you change a record, servers keep the old data until their cache expires, so some may return outdated information for a while. This is what people call propagation, and it explains why changes can look inconsistent for a time.
The records business owners meet
- A and AAAA: point a name to an IP address (IPv4 and IPv6).
- CNAME: points one name to another name, often used for
wwwor a service such as a shop platform. - MX: tells the world where to deliver email for the domain.
- TXT: carries text, commonly used to verify ownership and for email authentication such as SPF and DKIM.
- NS: says which nameservers are authoritative for the domain.
Treat these as typical uses, not an exhaustive list, and follow the instructions your provider gives for each service.
A note on .au domains
The auDA fact sheet for Australian businesses says that for com.au and net.au you must be a commercial entity registered to do business in Australia, and the name must meet naming rules (matching or being an acronym of your business name, matching an Australian trade mark you hold, or relating to a good, service, event, activity or premises you provide). It says all .au domains require a validated connection to Australia, such as an ABN or government-issued identification, and that businesses and individuals can register in the .au direct namespace. The full requirements sit in the .au Licensing Rules, so check them before registering, especially for an overseas business.
Ownership and renewal risks
- Registered in someone else’s name. A web agency, a former employee or a friend may be listed as registrant. Make sure your business is the registrant and that the contact email is monitored.
- Single login. Use a shared role-based email address and keep login details in a password manager the business controls.
- Missed renewals. Turn on automatic renewal, keep payment details current, and note expiry dates in a calendar. An expired domain can take down your website and email together.
- Careless transfers. Moving between registrars has rules and timing. Plan it, and do not change nameservers before you know where email will live.
- Lookalike domains. Consider whether to register obvious variants, weighing cost and benefit.
A pre-launch DNS checklist
- Confirm the registrant, expiry date and renewal method.
- List every service using the domain: website, email, booking tools, marketing platforms.
- Lower record cache times (TTL) before a planned change, if your provider allows.
- Record all existing DNS entries before changes, especially MX and TXT.
- After switching, test the website, email sending and receiving, and any subdomains.
When you migrate a site, DNS is one piece of a larger plan; see how to plan a website redesign without losing SEO value. For where the site itself lives, read hosting options for business websites, and for how traffic reaches visitors faster, what a CDN does.
Limits
This is an overview. Registry rules, fees and processes differ by domain extension and provider, and the sources here do not cover all of them. Always check your registrar’s current terms.
Where Radiance Impact fits
Radiance Impact’s Technology division builds business websites and provides maintenance and care, which includes working through domain and DNS arrangements with a client. To talk through a launch or a migration, contact us or see the Technology page.
Sources
- What is a domain name?, MDN Web Docs
- DNS (Glossary), MDN Web Docs
- .au domain names: Australian businesses fact sheet, auDA
