How to Register a .th / .co.th / .in.th Domain in 2026

Guide to .th domain registration for businesses and individuals — extension differences, required documents and reasons to get a Thai domain

What is .th and who manages it

.th is Thailand’s country-code top-level domain (ccTLD), managed by the Thai Network Information Center Foundation (THNIC). Its registration rules are stricter than generic extensions such as .com so that each domain reflects the real identity of a Thai organisation or individual.

• Managed by the THNIC Foundation and accredited registrars
• As a ccTLD it sends a clear “Thai business” signal to users and Google
• Most sub-extensions require identity or company documents
• The domain name should match your organisation name or trademark
• Ideal for organisations, brands and trust-focused Thai websites

The .th sub-extensions explained

Under .th there are several second-level extensions, each reserved for a different type of registrant. Choosing the correct one matters because each requires different documents and signals a different kind of entity.

• .co.th — companies and commercial entities (most popular for business)
• .in.th — individuals and any organisation (the most open option)
• .or.th — foundations, associations and non-profits
• .ac.th — educational institutions, schools and universities
• .go.th — government; .net.th — network operators; .mi.th — military

Documents required for each type

The core of a .th registration is the document proving your right to the name. Preparing the correct paperwork up front speeds up approval, while a domain that does not match the name on your documents is usually rejected.

• .co.th: company affidavit / commercial registration, or a trademark matching the domain
• .in.th: national ID for individuals, or organisation papers — the most flexible
• .or.th: foundation or association establishment papers
• .ac.th: a letter from the educational institution
• The domain must relate to the name on your documents (company A should register a.co.th)

Step-by-step registration

The process is straightforward once your documents are ready. You normally register through a provider accredited to sell .th domains — many of which also bundle hosting, so you can launch your site in one place.

• 1) Search for your desired name and confirm it is available
• 2) Pick the correct sub-extension (.co.th for a company, etc.)
• 3) Submit your proof-of-eligibility documents
• 4) Pay the annual fee
• 5) Wait for document review and approval (usually a few business days)

.th pricing and renewal

.th domains carry a slightly higher annual fee than .com because of the verification process, but they are worth it for businesses that need credibility. Always compare the renewal price, not just the first-year promotion.

• Fees are annual and set by each registrar
• Renewal usually equals the first-year price (unlike discounted .com promos)
• Enable auto-renew so you never lose the domain by forgetting
• You can register several years ahead to protect the name
• Check transfer fees and registrant-update policies too

Why Thai businesses should own a .th

A .th domain is more than an address — it is a credibility signal. Many Thai customers trust a .co.th site more because they know it passed real company verification, and owning it also stops others from grabbing your brand name.

• Builds trust with Thai customers, especially B2B and government
• Helps local SEO and geographic relevance
• Brand protection — stops competitors or scammers registering look-alikes
• Pairs with professional company email @yourcompany.co.th
• Ideally own both .com and .co.th to cover local and global

Pairing your .th domain with hosting

Once you have a .th domain you still need hosting for the website and company email. From our testing, using a provider with servers in Thailand keeps load times fast for local visitors and lets you manage the domain, email and SSL from one panel.

• Choose a host with servers in Thailand/Singapore for speed
• Look for a panel that manages DNS and email, such as DirectAdmin
• Free SSL and automatic backups should be included
• Thai-language support helps with .th DNS configuration
• Keeping domain + hosting + email together reduces hassle

Common mistakes when registering .th

Newcomers often trip over mismatched documents or the wrong sub-extension, leading to rejection and wasted time. Understanding the rules up front gets you approved on the first try.

• Choosing .co.th without a registered company (use .in.th instead)
• A domain that does not match the legal entity or trademark
• Letting it lapse so someone else registers it
• Entering the wrong registrant details, which are hard to fix later
• Not registering close variants to protect the brand