.co.th Domain: Thailand's Extension for Businesses
.co.th is the second of seven categories beneath Thailand's country extension .th, and it is reserved for business entities. Authority is split: policy is set by THNIC, the Thai Network Information Center Foundation, while registration services are carried out by its company T.H.NIC Co., Ltd. The «.TH and .ไทย Domain Name Registration Policy» in force was announced on 1 May 2020 and took effect on 1 June 2020; in case of discrepancy the Thai original governs.
Eligibility is locked to Thailand. Clause 7 requires the holder to be of Thai nationality or a legal entity under Thai law. For a company based abroad the route is written into the fifth limb of the category: appoint a grantee of power of attorney (an agent) to be responsible for the domain on your behalf — and that agent must itself be a business registered with the Department of Business Development or registered for VAT with the Revenue Department in Thailand. Clause 14.1 confirms the rights remain yours. The trustee service carries a fee, shown during the order.
The second constraint sits in the name itself: clause 3.3 requires it to be derived from the organisation's name, a project name or a trademark. Registration runs from one to ten years. Transfer is prohibited as a rule, with four exceptions — one of which is directly useful, namely a foreign holder changing its local agent. On disputes clause 15 is explicit: the registry declines to act as intermediary and acts only on a court order or a written settlement. Check a name that matches your registered title on the domain name search page.
.CO.TH Domain at a Glance
- Policy set by THNIC — Thai Network Information Center Foundation
- Registration services T.H.NIC Co., Ltd.
- Policy in force Announced 1 May 2020, effective 1 June 2020
- Category Category 2 — the commercial one of .th's seven categories
- Applying from abroad Through an agent registered or VAT-registered in Thailand
- Dispute route No published ADR — court order or written settlement only
- Document Requirement View required documents
- Country Thailand
- Character Length 2 - 63 characters
- Registration Period 1 - 10 years
- Name Server Count 2 - 8 servers
.co.th Domain Prices — No Surprise Fees
Registration, transfer and renewal fees are listed separately. The renewal price can differ from the first-year price, so you see both up front.
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New Registration
$249.90 /year -
Transfer
$249.90 /year -
Renewal
$274.90 /year -
Restore
$299.99 -
Trustee Service
$149.00
Included With Every .co.th Domain
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Free DNS management
Change A, MX, TXT and CNAME records yourself from the panel — no waiting on anyone when you move a site or mailbox.
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Domain forwarding
Point the domain at your existing site, a campaign page or a social profile — at no extra cost.
.co.th Domain Lifecycle
What happens day by day after it expires
Day 0 is the domain's expiry dateIn short: for .co.th the post-expiry timeline is set by the registry, so it differs from one extension to the next. The diagram below shows the windows that actually apply to .co.th, day by day. One thing never changes, whichever extension you hold: renewing before the expiry date is always the cheapest and safest route.
Domain Is Available (Available)
A .co.th address at this stage has not been taken yet, and it goes to whoever registers first. Check the name you have in mind — if it is free, it can be yours within minutes.
Domain Is Active (Active Period)
Once registration is complete, the domain is registered to you for the term you selected. You can renew at any point before it expires to keep it active, or switch on auto-renewal so you never have to watch the date.
Redemption Period (Redemption Period)
The domain is not released the moment it expires — during this window it is still yours and can be recovered. Some extensions charge an extra restore fee at this stage, so renewing before expiry is always the cheaper route.
Pending Delete Period (Pending Delete Period)
If the redemption window is missed too, the domain enters the final stage and waits to be deleted. Renewal and recovery are no longer possible here; when the period ends the registration is removed for good.
Domain Is Available Again
Once deletion completes, the domain leaves the system and anyone can register it — popular names are often taken the same minute by someone watching. Keep auto-renewal on so a name you care about never gets this far.
.co.th Domain Specifications and Registration Rules
Registration conditions, supported features and the registry's own timelines in a single table.
.co.th Domain Registration
- Document Requirement View required documents
- Country Thailand
- Character Length 2 - 63 characters
- Registration Period 1 - 10 years
- Name Server Count 2 - 8 servers
.co.th Domain Support
- IDN Support No
- Transfer Support Yes
- Late Renewal Support Yes
Documents Required for a .co.th Domain
.IN.TH:
- There are no requirements.
.CO.TH:
The owner must have the following:
- A registered trademark (matching your domain name) in any country.
- A local administrative contact in Thailand. If you do not meet this requirement we can register the domain to the name of our representatives in Thailand and then make it available to you; this option has an additional cost (Trustee Service).
- If you don't have a trademark, we can file a quick trademark application for you for an additional cost of US$ 85. The trademark name must be similar to the name of the domain. This process can take up to 4 weeks.
Frequently Asked Questions About .co.th Domains
The questions people actually ask before registering — answered plainly.
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Yes, but not directly. Clause 7 requires the holder to be of Thai nationality or a legal entity under Thai law, and the fifth limb of the category gives foreign entities and trademark owners a single route: appoint an agent (a grantee of power of attorney) to be responsible for the domain on your behalf. That agent must be a business registered with the Department of Business Development or registered for VAT in Thailand. Clause 14.1 confirms that the rights of use remain with the domain holder.
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It depends on the eligibility limb you enter through. Companies incorporated in Thailand present their Department of Business Development record, VAT-registered applicants their Revenue Department registration, and trademark applicants their Department of Intellectual Property certificate. An applicant from abroad needs two: the power of attorney and the agent's own business registration. Clause 14.2 treats the information you submit as a guarantee of its accuracy, and clause 16 allows suspension or revocation without prior notice where information proves false.
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No. Clause 3.3 requires the name to be derived from the organisation's name, a project name or a trademark. If you derive it from a company name, it must explicitly imply that name in full or an abbreviation of any part of it, and the clause adds a flat prohibition: «It is not permitted to switch the order or add characters or numerals.» Through the trademark route, clause 3.3.3 requires the name to be identical in all respects to the mark in both letters and numbers. Generic or keyword-led names cannot be registered in this zone.
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Clause 10 of the policy states the range plainly: «Annual domain name renewal is for a minimum of one (1) year and up to ten (10) years maximum.» The same clause puts the tracking on you — verifying the expiry date, submitting the renewal request and paying the annual fee before the registration expires are all the holder's responsibility. Clause 8 also refers to a redemption fee after expiry, though the policy does not state how many days the redemption window lasts.
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As a rule, no. Clause 11 states that domain name ownership cannot be transferred to another person and allows only four exceptions: a change in trademark ownership; a change in the legal status of a corporate holder through merger or acquisition, or a transfer of the business; a foreign holder changing the local agent; and the death of the holder or a court order of disappearance, incompetence or quasi-incompetence. The third exception keeps the route open for changing your trustee provider.
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The registry does not mediate. Clause 15 says so directly: THNIC and the registrar reserve the right not to serve as an intermediary in disputes among domain holders and will settle a dispute only by relying on a court order or a written legal agreement between the parties. If a dispute arises during registration, the process may be suspended. There is therefore no fast administrative route comparable to UDRP under .co.th; claims run through the Thai courts or arbitration.
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Each .th category has a Thai-script counterpart, and the one paired with .co.th is .ธุรกิจ.ไทย. Clause 4.4.5 ties them together: a holder of a .th name is entitled to register a .ไทย name in the same category, the two must be consistent with each other, and translations or synonyms must follow the rules of the Office of the Royal Society. .co.th itself uses ASCII characters only — Thai script operates under the separate extension.
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