Ready to find your name?
Generate hundreds of ideas with live domain availability checks — free.
A domain name is the human-readable address of a website. It is the text you type into a browser, like nametastic.com, that stands in for the numeric IP address computers actually use to find the server. You do not own a domain outright; you register it for one to ten years through a registrar and keep it for as long as you renew. This guide explains the parts of a domain, how it differs from a URL, how the lookup works, and what to expect to pay.
What a domain name is, in plain terms
Every server on the internet has an IP address, a string of numbers like 203.0.113.42. Nobody wants to memorize those. The domain name system lets you type a word instead. When you type nametastic.com, your computer asks a directory service for the number behind it and connects. The domain name is the label. The IP address is the location. DNS maps one to the other.
A domain name is unique. Only one person or company can hold nametastic.com at a time. That uniqueness is what makes a domain valuable.
The parts of a domain name
Read a domain right to left. Take blog.nametastic.com.
- Top-level domain (TLD) — the last part, .com. This is the extension, managed by a registry. There are over a thousand, from .com and .org to .io, .ai, and country codes like .uk or .de.
- Second-level domain (SLD) — the part left of the TLD, nametastic. This is what you choose and register. "Our domain" usually means SLD plus TLD: nametastic.com.
- Subdomain — anything left of the SLD, here blog. Subdomains are free and unlimited once you own the domain; you create them in DNS to point at different services: blog., app., mail., shop.
- www — technically just a subdomain. nametastic.com and www.nametastic.com almost always point at the same site, and one redirects to the other.
Domain vs URL vs website vs hosting
These four words get used interchangeably and they are four different things.
| Term | What it is | Example |
|---|---|---|
| Domain name | The address you register | nametastic.com |
| URL | A full address to one page, with protocol and path | https://nametastic.com/blog/what-is-a-domain-name |
| Website | The pages that load when someone visits the domain | The pages, images, and code you see |
| Hosting | The server where the website's files live | A cloud server or hosting plan |
A URL contains a domain: the protocol (https://) before it and the path (/blog/...) after it. One domain can have millions of URLs.
A domain without hosting is an address with no house. A website without a domain is a house with no address. You need both, and you can buy them from different companies: the domain from a registrar, the hosting from a provider, with DNS connecting them.
How DNS turns a name into a website
DNS (Domain Name System) is the internet's phone book. When you type nametastic.com, this happens in well under a second:
- Your device checks its own cache for a recent answer.
- If none, it asks a resolver, usually run by your ISP or a public service.
- The resolver asks a root server, which says "for .com, ask these servers."
- The .com TLD servers say "for nametastic.com, ask these nameservers."
- The domain's authoritative nameservers return the IP address, and your browser connects.
Every step is cached, which is why a DNS change can take hours to show everywhere. "Pointing" a domain at hosting means editing the records those nameservers hand out: A (IPv4), AAAA (IPv6), CNAME (another name), MX (email).
Types of top-level domains
TLDs fall into a few families. The family affects who can register one, what it costs, and what people assume when they see it.
| Type | Examples | Who it is for | Notes |
|---|---|---|---|
| Generic (gTLD) | .com, .net, .org | Anyone | .com is the default people type; .org signals non-profit. |
| Country code (ccTLD) | .uk, .de, .ca, .jp | Tied to a country | Some require local presence. Signals a local business. |
| Repurposed ccTLD | .io, .ai, .co, .tv | Anyone, in practice | Country codes marketed as generic. Standard in tech. |
| New gTLD | .app, .dev, .shop, .xyz | Anyone | Introduced from 2013. Descriptive; .app and .dev require HTTPS. |
| Restricted | .gov, .edu, .bank | Verified organisations | You must prove eligibility. |
For most businesses the decision is between a .com and one of the tech-friendly repurposed codes. The .com wins on recognition; the others win on availability.
How registration works and who ICANN is
Three layers sit between you and a domain.
- ICANN — the Internet Corporation for Assigned Names and Numbers, a non-profit that coordinates the global domain system. It decides which TLDs exist, accredits registrars, and sets the rules. It does not sell domains. See icann.org.
- Registries — one organisation runs each TLD and keeps its master database (Verisign runs .com). Registries set the wholesale price and do not usually sell to the public.
- Registrars — the companies you buy from. They pay the registry wholesale and add a margin plus services like DNS, privacy, and email forwarding. You can move a domain between registrars after the first 60 days.
When you register, your contact details go into the domain's WHOIS/RDAP record; most registrars offer privacy protection that masks them. You hold the domain for the term you pay for. If you do not renew, it passes through a grace period and a redemption period, then is released for anyone to register.
Registering a domain does not give you the right to use the name commercially. Trademarks do that, and a trademark holder can take a conflicting domain from you.
What a domain name costs
Prices vary by extension and registrar, but the ranges are predictable.
- .com — typically $10 to $20 per year at most registrars. First-year promotions are often lower; the renewal price is the one that matters.
- .net, .org — similar to .com, sometimes a few dollars more.
- .io — usually $30 to $60 per year.
- .ai — often $70 to $150 per year, sometimes with a two-year minimum.
- New gTLDs (.app, .shop, .xyz) — a few dollars to $50 per year; some are cheap in year one and expensive to renew.
- Country codes — vary widely; check the local registry.
Two things push the price above these ranges. Premium domains are names the registry has flagged as valuable (short, dictionary words) and priced at hundreds or thousands of dollars, sometimes on every renewal. Aftermarket domains are already owned by someone willing to sell; prices run from a few hundred dollars for a two-word .com to six or seven figures for a single generic word.
Always check the renewal price before buying. A $1 first-year domain with a $40 renewal is a $40 domain.
How to pick a domain name
The short version:
- Keep it short and easy to spell after hearing it once.
- Prefer the .com for consumer brands; .io or .ai are fine for technical products.
- Avoid hyphens and numbers.
- Search the USPTO trademark database before you buy.
- Check that the matching social handles are free.
- Register it the day you decide, and turn on auto-renew.
The hard part is finding a name that is both good and available. The Domain Name Generator produces short, pronounceable candidates and checks availability across extensions as it goes. If you are naming the company itself, start from the Business Name Generator or the Tech Startup Name Generator.
FAQ
Can I own a domain name forever?
No. Domains are registered, not owned, for one to ten years at a time. There is no limit on renewals, so a domain you keep paying for is yours for life. Let the payment lapse and it eventually goes back into the pool.
What happens when a domain expires?
First a grace period, typically up to 30 to 45 days, during which you can renew at the normal price. Then a redemption period of around 30 days where you can still recover it for a fee. After that the registry deletes it and anyone can register it; expired domains with traffic are often taken within seconds by automated buyers.
What is the difference between a domain and a trademark?
A domain is an address; a trademark is a legal right to use a name for specific goods or services. Registering nametastic.com does not stop someone trademarking "Nametastic" for software, and a trademark holder can challenge an infringing domain. If the name matters, do both.
Can two people have the same domain name?
Not the same full domain. nametastic.com has one registrant at a time. Two people can hold the same name on different extensions (nametastic.com and nametastic.io), which is why the extension matters and why brands register several.
Do I need a domain to have a website?
Technically no; a site can be reached by IP or a platform subdomain. In practice, yes. Your own domain is portable, memorable, and the only way to have branded email.