Developer Tools
Look up top-level domains in your browser. Search ccTLDs, gTLDs, sponsored, infrastructure, and reserved TLDs with registry, type, and restrictions.
Type
Registration
Category
.com
The default commercial TLD and the most widely used domain extension in the world.
Originally for commercial entities, .com is now open to anyone in any country. Renewals are managed by Verisign under a long-running ICANN contract. Premium prices apply to short, single-word, and dictionary-word .com names on the secondary market.
Browse 73 TLDs
Click any card for details
TLD types at a glance
Generic (gTLD)
Open or lightly-restricted TLDs available to anyone. Includes the originals (.com, .net, .org) and the modern 2014-onward gTLDs (.app, .xyz, .dev, .online).
Country code (ccTLD)
Two-letter TLDs assigned to each ISO 3166-1 country or territory. Some are restricted to nationals or residents; many (.io, .co, .me, .tv) sell globally.
Sponsored (sTLD)
TLDs with a defined sponsor and a community-eligibility policy: .gov, .edu, .museum, .aero, .post, .bank, .insurance.
Infrastructure (.arpa)
Used by the DNS itself for reverse lookups and protocol-defined names. Not available for end-user registration.
Special use
IETF-reserved labels that are never delegated in the public root: .test, .example, .invalid, .localhost (RFC 6761) and .onion (RFC 7686).
The IANA Root Zone Database is the authoritative list. This page covers the most-searched TLDs across each type, including the original 1985 round, the 2000 and 2012 expansion rounds, and the ccTLDs that handle most of the world's internet traffic.
TLD Lookup is a fast, offline-friendly reference for the labels that appear at the end of every hostname on the public internet. Search by the TLD itself (.io, .ai, .gov), by a full hostname (the page extracts the TLD for you and selects it), by country name (Anguilla, Tuvalu, Montenegro), by registry or sponsor (Verisign, Google Registry, EURid, GoDaddy Registry, fTLD), or by any keyword in the description (HSTS preloaded, restricted, ICP filing, real-name verification). Each entry covers the canonical lowercase label, the full English name, the IANA type (gTLD, ccTLD, sTLD, infrastructure, or special use), a topical category, the introduction year, the registry or sponsoring organisation, registration access (open, restricted, or closed), a one-line description, and a longer note explaining the typical real-world use, eligibility rules, security defaults, and any caveats developers and brand teams care about. The catalog covers the original 1985 round (.com, .net, .org, .edu, .gov, .mil), the 2000 to 2012 sponsored expansions (.info, .biz, .museum, .aero, .coop, .jobs, .mobi, .asia, .post, .cat), the highest-traffic new gTLDs from the 2014 round (.xyz, .app, .dev, .tech, .online, .store, .blog, .news, .health, .bank, .insurance, .pharmacy, .law), the ccTLDs that handle most of the world's internet (.us, .uk, .de, .fr, .jp, .cn, .in, .br, .ca, .au, .ru, .eu, .nl, .es, .it, .ch, .se, .no, .za, .mx, .ar, .kr, .tr) plus the small-island ccTLDs that have been adopted globally as generic technology TLDs (.io, .ai, .co, .me, .tv), the infrastructure TLD (.arpa), and the IETF special-use labels that never resolve in the public DNS (.test, .example, .invalid, .localhost, .onion, .local). Filter by type, registration access, or category, then click any card for the full detail panel and copy the TLD or the TLD-plus-name string to your clipboard. The dataset is shipped statically with the page and nothing about the TLD you look up is sent anywhere.
Free to use. Works in your browser. No signup, no login.
Related tools
Search 249 ISO 3166-1 country codes. Alpha-2, alpha-3, numeric, ccTLD, and flag.
Open tool
DeveloperFind the MIME type for any extension, with Content-Type header and aliases.
Open tool
DeveloperSearch common TCP and UDP ports by number, service name, or category.
Open tool
DeveloperSearchable DNS record types cheat sheet with examples, RFC links, and a compare panel.
Open tool
DeveloperISO 639 and BCP 47 reference with HTML lang, hreflang, and Accept-Language snippets.
Open tool
DeveloperExtract the root domain (eTLD+1) from a list of URLs, deduplicate, and count.
Open tool