What Is a Domain Name? How It Works and How to Choose One
A domain name is your website's address on the internet, such as yourbusiness.co.za. People type it into a browser to find your site, and your email addresses use it too, as [email protected]. You register a domain through a registrar, usually for a year at a time, and as long as you renew it, the name is yours to use.
In short
- A domain is a name, not a website. It points to a server where your site lives. Hosting is the second half.
- You rent it. You register it for a set term, usually a year, and renew it, and you stay the registrant.
- The ending matters less than the name.
.co.zais the natural home for a South African business, and.comis the international default. - Choose a short name that is easy to say, spell and remember.
- Keep the registrant details yours. The email on the domain decides who can move it.
What does a domain name mean?
Computers find each other by number, called an IP address, such as 203.0.113.10. People remember words. A domain name is a word that stands in for the number, and the domain name system, DNS, is the phone book that turns one into the other. When you type your domain into a browser, DNS finds the server that holds your site, and the page loads.
What are the parts of a domain name?
Take www.yourbusiness.co.za. Read it from right to left:
| Part | Example | What it is |
|---|---|---|
| Top-level domain (TLD) | .za |
The country or category at the end |
| Second-level domain | .co.za |
The type of organisation within the country |
| The name you choose | yourbusiness |
The part that is yours |
| Subdomain | www |
A section of the domain you can add freely |
You pay to register the name you choose under the ending you pick. Subdomains such as shop.yourbusiness.co.za or mail.yourbusiness.co.za cost nothing extra. What is a TLD? explains endings in more detail.
Who runs domain names?
Three parties are involved in every domain:
| Party | Role | For a .co.za name |
|---|---|---|
| Registry | Keeps the master list of every name under an ending | ZA Registry Consortium (ZARC) |
| Registrar | The company you register and renew through | Noiz, or another accredited registrar |
| Registrant | The business or person the name is registered to | You |
The .za namespace is regulated by the .za Domain Name Authority (ZADNA). Generic endings such as .com follow the rules of ICANN. The registrant decides. If a web designer or an old host registers the name in their own name, they, and not you, control your address. Domain transfer checklist for South African businesses shows how to check.
Which ending should you choose?
| Ending | Best for | Note |
|---|---|---|
.co.za |
South African businesses | The expected home for local companies, with a local registry |
.org.za |
Non-profits and organisations | Registered the same way |
.com |
Businesses that sell abroad | The international default |
.africa, .joburg, .capetown, .durban |
A regional or city identity | Less familiar to customers than .co.za |
Choose the ending your customers will type. If you want both, register both and point one at the other. How to register a domain in South Africa covers the process.
How do you choose a good domain name?
- Keep it short, with two or three syllables if you can.
- Make it easy to say on the phone. If you have to spell it, it is too hard.
- Avoid hyphens and numbers, which people forget or mistype.
- Check it reads well run together, because there are no spaces in a domain.
- Search for the name to see whether another business uses it, and whether it is a trade mark.
- Think about what you will do next year. A name tied to one product is harder to grow with.
How to choose the right domain name for your website goes through each step.
How do you register a domain?
- Search for the name on the Noiz domain search. It shows whether it is free, with the one-year price beside each ending.
- Add it to your cart and check out.
- Enter your own details as the registrant, with an email address you read.
- Pay the invoice. The name is registered once it is paid.
A new Legacy or Premium shared hosting plan includes the first registration of a .co.za domain, so your name and your hosting start together. The conditions are on the plan page.
What happens after you register?
- Renewal. Names renew each year automatically unless you switch automatic renewal off. A reminder arrives before the expiry date. What happens when a domain expires shows the stages.
- Pointing. Your domain needs to know where your website and email live. On Noiz hosting, the DNS sits in Plesk beside your site and your mail. How DNS works explains the records.
- Protection. Keep your registrant email current, and watch out for fake renewal notices. Domain scams and fake renewal notices shows what to look for.
What is the difference between a domain and hosting?
A domain is the address. Hosting is the house. You need both to have a website, and they can come from different companies. Domain, DNS and hosting: what is the difference shows how they fit together, and What is web hosting? explains the second half.
What if the name you want is taken?
Try a close variation: add a word that describes what you do, or the town you are in, or choose another ending. Do not buy a name that is plainly another business's brand. If you are sure you have a claim, South Africa has a dispute process for abusive registrations, run through ZADNA.
Register your name with Noiz
Search for your name on the Noiz domain search, and register it with you as the registrant, renewed with notice every year. Registrations follow the registry's rules and our Specific Terms. Already own a name elsewhere? Moving it to Noiz is free for the .za endings: see how to transfer a domain to Noiz.
Read next
- How to register a domain in South Africa
- Domain, DNS and hosting: what is the difference, and why renewals matter
- Why domain prices are rising
Sources
- RFC 1034: Domain names, concepts and facilities: how names work.
- ZARC: the registry for co.za, org.za, net.za and web.za.
- ZADNA: the regulator of the .za namespace.
- ICANN: Registrants' Benefits and Responsibilities: what a registrant is entitled to and must do.
- Noiz domain search and price table: read on 10 November 2026.
Note: while some of this content was produced with the help of AI, the final editing has been done by a real human being.
