Top-Level Domain (TLD)
A top-level domain, or TLD, is the final part of a domain name.
Examples include:
.com.org.ca.io
In:
mannyroy.com.com is the top-level domain.
MDN describes the TLD as the highest, most general level in the hierarchical Domain Name System. MDN's TLD glossary
Common Types of TLD
TLDs include several categories.
### Generic top-level domains
Examples include:
.com.org.net
and many newer extensions.
### Country-code top-level domains
Country-code TLDs, or ccTLDs, generally correspond to countries or territories.
Examples include:
.ca— Canada.uk— United Kingdom.fr— France
The rules for registration can differ between TLDs.
Who Operates a TLD?
Each TLD is operated by a Domain Registry.
The registry maintains the authoritative registration data for domains beneath that extension.
Domain Registrars provide the customer-facing registration service through which people and organizations typically register names.
ICANN describes registry operators as the organizations responsible for operating individual top-level domains.
Why It Matters
The TLD affects the registration ecosystem surrounding a domain.
It can influence:
- Registration rules
- Pricing
- Renewal
- Transfer procedures
- Registry policies
- Domain availability
But choosing a TLD does not determine where the website must be hosted.
A .ca site can be hosted on infrastructure in many different locations, subject to any organizational or regulatory requirements that apply.
Common Problems
Common misunderstandings include:
- Assuming the TLD is the hosting provider
- Assuming a country-code TLD determines server location
- Choosing unusual TLDs without considering user familiarity
- Forgetting that different TLDs may have different registration rules
How to Improve
Choose the domain around the organization's identity and audience first.
Then understand the registration and renewal requirements associated with the selected TLD.