- Category
- Country code
- IANA type
- Country Code
- Country
- Thailand
- Manager
- Thai Network Information Center Foundation
- Script
- Latin
- DS in root
- 1 record(s)
- Algorithm
- 8 · RSASHA256
- Second-level
- 7 suffixes
- IDN names
- yes, 1 scripts/languages
- WHOIS
- whois.thnic.co.th
- RDAP
- yes
Checked 26 Oct 2026 by our weekly check.
Is a .th name registered?
Looked up from your browser in the registry's RDAP service; if that does not answer, in DNS. Nothing is stored on dnssec.in.What this means
The root zone holds a DS record for .th, so the extension is signed and anchored. A domain under .th can use DNSSEC with a full chain of trust: it needs to be signed at its DNS host and have its own DS at the registrar. .th is the country code for Thailand; its registry sets who can register.
Second-level suffixes under .th (7)
You can register names directly under .th or under these suffixes, for example example.co.th. Some are restricted to certain users (government, education, banks). Source: the Public Suffix List.
- .ac.th
- .co.th
- .go.th
- .in.th
- .mi.th
- .net.th
- .or.th
IDN names under .th
The registry publishes IDN tables at IANA for 1 scripts or languages, so names can use these characters (stored as xn-- in the DNS):
- Thai (Thailand) Language
Length
DNS limits are the same everywhere: each label is 1 to 63 characters, the whole name at most 253, letters, digits and hyphens, not starting or ending with a hyphen. IDN labels count their xn-- form, so fewer native characters fit. A registry can set a higher minimum (often 2 or 3 characters) or reserve short names: that is in its own policy.
WHOIS and RDAP
RDAP (the JSON successor to WHOIS) answers at https://rdap.thains.co.th/. Classic WHOIS (port 43) answers at whois.thnic.co.th.
Lifecycle and drop
Country code extensions set their own lifecycle: grace periods, redemption and release dates differ from country to country and are not covered by ICANN's gTLD policies. Read the registry's rules: http://www.thnic.co.th.