What Is a Domain Name and How to Choose One

What Is a Domain Name?

A domain name is the human-readable address of a website on the internet. Instead of remembering a numeric IP address like 203.150.1.45, you simply type a name like asiagb.com into your browser and it takes you straight to the right website. Every website online needs a domain name to be accessible to the public.

A domain name consists of two parts: the name itself (e.g., "asiagb") and the extension, also called a TLD — Top-Level Domain (e.g., ".com"). Together they form a complete, unique address on the internet. The Domain Name System (DNS) handles the translation between that readable name and the server's actual IP address behind the scenes.

How Domains Work — DNS Resolution Step by Step

When you type a domain name into your browser, a behind-the-scenes process runs in a fraction of a second to find the correct IP address of the server before the website appears. This process is called DNS resolution, and it happens in the following stages:

1. The browser checks its cache first — Your browser and operating system first look to see whether they have visited this domain recently. If a valid IP is still stored in the cache, it is used immediately without asking anyone else.
2. The query goes to a DNS resolver — If nothing is cached, your device asks a DNS resolver (usually run by your internet provider, or a public service like 1.1.1.1 or 8.8.8.8) to help find the domain's IP address.
3. Root and TLD servers are queried — The resolver asks a root server which TLD server is responsible for the extension (.com, .th), then asks that TLD server which name servers hold the records for this specific domain.
4. The authoritative name server answers — Finally, the resolver queries the authoritative name server that stores the domain's real records (such as the A record pointing to the server's IP) and receives the IP address in return.
5. Connection and display — With the IP in hand, the browser connects to the destination server, downloads the website files, and renders the page. The result is cached temporarily based on the record's TTL (Time To Live) so the next visit is faster.

The TTL value set in each DNS record determines how long a result stays cached. This is why, when you edit DNS records or migrate hosting, changes can take anywhere from a few minutes to 24–48 hours to propagate worldwide, depending on the previous TTL value.

Domain vs Hosting — What's the Difference?

Many people confuse a "domain" with "hosting" because both are needed to run a website, yet they do completely different jobs. If a website were a shop, the domain would be the shop's name and street address that lets customers find it, while hosting would be the building and storage space that holds the actual files, images, and database.

You can register a domain with AsiaGB and point it to hosting anywhere, or keep both your domain and hosting with AsiaGB for easier management in one place. The two services work together through DNS settings (such as an A record or name servers) that point your domain name to the hosting server where your website lives.

Types of Domain Extensions

.com — The Global Standard

The most widely recognised extension worldwide. Suitable for any type of business or individual website. No special documentation required — registration is instant after payment. Price: 500 THB/year.

.net — Networks and Technology

Originally intended for network-related organisations, now used broadly. A good alternative when your preferred .com name is already taken, particularly for tech companies and internet service providers.

.co.th — Thai Business Domain

Designed specifically for registered companies operating in Thailand. Price: 800 THB/year. Signals trust and local credibility to Thai customers. Requires documentation such as a company certificate from the Department of Business Development (DBD).

.in.th — Thai Individual Domain

Available to individual Thai residents at 600 THB/year. Requires a Thai national ID card for registration. A cost-effective option for personal websites, blogs, or freelancers based in Thailand.

.th — Top-Level Thai Country Domain

The official country-code TLD for Thailand. Mainly used by government agencies and large institutions. Registration requirements are stricter than .co.th or .in.th.

.org — For Organisations and Nonprofits

Originally intended for non-profit organisations, foundations, and communities, but now open to anyone. It signals a mission-driven identity and suits associations, community groups, and social projects.

Common Extensions at a Glance

The table below summarises the strengths of each extension to make the decision easier:

How to Choose the Right Domain Extension

The best extension depends on your target audience, industry, and growth plans. Consider these factors before deciding:

• Target audience — If most of your customers are in Thailand, .co.th or .in.th builds local credibility. If you want to reach international markets, .com is the safer choice.
• Memorability — Keep the name short, easy to spell, and clearly connected to your brand or business.
• SEO — Country-code domains like .co.th signal to Google that your site is aimed at Thai users, which can benefit local search rankings.
• Availability — Check whether your preferred name is still available. If the .com version is taken, consider .net or a country-code alternative.
• Budget — .com at 500 THB/year offers the best value for most businesses starting out.

Documents Required for Thai Domains (.co.th and .in.th)

Thai domain extensions are administered by THNIC (Thailand Network Information Centre), which requires identity verification from all registrants.

For individuals (.in.th)

• Copy of Thai national ID card (must not be expired)
• Domain name must relate to the registrant's name or alias

For companies (.co.th)

• Company registration certificate from DBD (issued within the last 6 months)
• Domain name must correspond to the company name or registered trademark
• Copy of the contact person's Thai ID card

Simply send the documents above via email, and our team will review them and submit the registration to THNIC on your behalf at no extra cost. We only submit the application — the domain name is not guaranteed until THNIC approves it.

What AsiaGB Provides with Every Domain

Every domain registered with AsiaGB comes with a full set of management features included:

• Free DNS Management — Configure A Records, CNAME, MX, and TXT records directly from your control panel
• Free WHOIS Privacy — Keep your personal contact information hidden from public domain lookup databases
• Auto-Renew — Prevent accidental domain expiry with automatic renewal
• Email Forwarding — Forward mail sent to your domain address to any inbox you choose
• Free THNIC documentation assistance — For .co.th and .in.th registrations, our team handles the paperwork
• 500+ TLDs supported — .com, .net, .org, .io, .app, .store, and many more

How to Choose a Good, Memorable Domain Name

Beyond picking an extension, the name itself shapes your brand image and your website's long-term success. Follow these guidelines to land on a strong name:

• Keep it short and memorable — Shorter names are easier to recall, less prone to typos, and simpler to share by word of mouth. Aim for roughly 6–14 characters where possible.
• Avoid numbers and hyphens — Hyphens (-) and digits create confusion over spelling and are easily forgotten when a name is spoken aloud.
• Make it easy to spell and pronounce — If a name is hard to spell or has multiple spellings, customers may type it incorrectly and never reach your site.
• Reflect your brand or service — A name connected to what you do helps people understand and remember your business faster.
• Check trademarks — Before registering, make sure the name does not clash with someone else's trademark to avoid future legal trouble.
• Think ahead — Choose a name that still works if your business expands into other areas; avoid tying it too tightly to a single product.

Extra tip: many brands register several extensions at once (for example, .com and .co.th) to stop competitors or bad actors from grabbing the same name under another extension, and to ensure customers find them no matter which extension they type.

Frequently Asked Questions

Do I have to buy a domain and hosting together?

No, you don't have to buy them at the same time. You can register just a domain first to reserve the name, then purchase hosting later. However, to put a live website online you need both — keeping them with the same provider like AsiaGB makes DNS setup and management simpler in one place.

Do I own a domain forever?

A domain is leased on an annual basis rather than bought outright. You retain the right to use it as long as you renew on time. If it expires, the domain can become available for others to register, so enabling Auto-Renew is recommended to avoid accidentally losing it.

Can I use a domain immediately or do I have to wait?

.com, .net, and .org domains are usually usable within a few minutes of payment. When you set up new DNS records or point a domain to hosting, propagation can take anywhere from a few minutes up to 24–48 hours worldwide, depending on the configured TTL.

What's the difference between .co.th and .in.th?

.co.th is designed for registered companies in Thailand and requires a company certificate, while .in.th is open to individuals and only needs a Thai national ID card, at a lower price. It suits personal sites, blogs, and freelancers. Both build credibility with Thai customers.