Check a Domain

Reference

All 36 domain extensions

Every extension we carry, documented properly: who operates the registry, who is eligible to register, how transfers work, and what the renewal actually costs.

Browse by group

Popular extensions

The 21 generic extensions and generically-marketed country codes that most buyers actually choose between.

Country extensions

15 national extensions, most with eligibility rules that are genuinely enforced.

Every extension we carry

.com

ClassicBusiness

The most recognised extension in the world, and still the one buyers assume by default. Its price-cap agreement and thin-registry structure matter more than most owners realise.

Verisign

.net

ClassicTechnology

The natural second choice when the .com is taken, with no eligibility rules and the same registry operator behind it.

Verisign

.org

ClassicBusiness

Carries a credibility no marketing budget can buy, and survived one of the most consequential governance fights in domain history.

Public Interest Registry

.io

TechnologyccTLD, used generically

The technology sector's favourite extension is a country code belonging to a territory whose sovereignty changed hands in 2024. What that means for registrants is the question nobody answers clearly.

Identity Digital

.ai

TechnologyccTLD, used generically

A Caribbean island of roughly fifteen thousand people now earns a material share of its national budget from two letters, and moved to a new registry arrangement in 2025.

Government of Anguilla

.co

BusinessccTLD, used generically

The most successful repurposing of a country code into a global commercial namespace, and a useful lesson in what that costs.

GoDaddy Registry

.app

Technology

Google paid a record sum at auction for this extension, then made it the first where every site must serve over HTTPS or not load at all.

Google Registry

.dev

Technology

The developer's extension, with the same mandatory-HTTPS rule as .app and the same capacity to surprise anyone who registers one blind.

Google Registry

.me

CreativeccTLD, used generically

Born directly out of the breakup of Yugoslavia and now a standard choice for personal sites, portfolios, and short branded links.

doMEn d.o.o.

.tv

CreativeccTLD, used generically

The extension that proved a country code could be a commodity, belonging to a nation facing a threat no other registry faces.

GoDaddy Registry

.cc

BusinessccTLD, used generically

A country code for a territory of a few hundred people, operated by the company behind .com and sold worldwide without restriction.

Verisign (eNIC)

.info

Classic

A genuine general-purpose alternative with a long track record, though one that carried a heavy spam reputation in its early years.

Identity Digital

.biz

Business

Launched alongside .info with a bona fide business-use requirement that is no longer meaningfully enforced.

GoDaddy Registry

.pro

Business

Launched with genuine credential requirements for doctors, lawyers, and accountants, and progressively opened to everyone.

Identity Digital

.tech

Technology

One of the more successful descriptive new gTLDs, with a first-year and renewal price gap worth understanding before you commit.

Radix

.cloud

Technology

A precise fit for infrastructure and SaaS products, run by an Italian hosting company rather than a pure-play registry.

Aruba PEC S.p.A.

.xyz

Business

Its launch produced one of the industry's longest-running arguments about what a registration number actually measures.

XYZ.COM LLC

.shop

E-commerce

An unambiguous retail signal, and the clearest example of what a descriptive extension is worth to a registry.

GMO Registry

.store

E-commerce

Widely promoted at very low introductory prices, which makes the renewal figure the only number that really matters.

Radix

.online

E-commerce

Among the largest new gTLDs by registration count, with the discount economics that go with it.

Radix

.site

E-commerce

A low-cost general-purpose option whose value depends entirely on whether you intend to renew it.

Radix

.us

CountryNexus required

The only major extension where you must formally declare your connection to the country and cannot hide your details afterwards.

Registry Services, LLC (GoDaddy Registry)

.uk

Country

The shorter British option, with a transfer mechanism that works nothing like the auth codes used by generic extensions.

Nominet

.co.uk

Country

Far more widely held than direct .uk, and the extension British customers actually expect to see.

Nominet

.ca

CountryPresence required

CIRA enforces its eligibility rules more actively than most registries, and revocation on audit is a genuine outcome.

CIRA

.com.au

CountryPresence required

Australia requires not only local presence but a demonstrable link between the registrant and the name itself.

auDA

.co.za

Country

By far the most used extension in South Africa, and unusually open for a national namespace.

ZA Central Registry

.de

CountryPresence required

Requires a German administrative contact, uses its own transfer process, and is consistently one of the biggest namespaces anywhere.

DENIC

.fr

CountryPresence required

France opened its namespace to the whole European Economic Area, which is broader than most buyers assume but still a real limit.

Afnic

.es

Country

Spain removed its presence requirements two decades ago, making .es one of the more accessible European country codes.

Red.es

.nl

Country

The Dutch register domains at a rate few countries match, and SIDN has been an early mover on DNSSEC and registry security.

SIDN

.eu

CountryPresence required

The Brexit revocations made .eu the clearest cautionary example anywhere of what happens when you stop qualifying for a namespace.

EURid

.ch

Country

Switzerland dropped its presence requirement and runs the registry on terms that differ noticeably from its neighbours.

SWITCH

.it

CountryPresence required

Run by Italy's National Research Council rather than a commercial operator, with residency rules drawn along European lines.

Registro.it (IIT-CNR)

.in

Country

India opened its namespace to the world and has grown one of the largest country-code registries in Asia.

NIXI

.cn

CountryVerified

Registration is only the first step: identity verification is required, and hosting inside mainland China needs a licence most foreign registrants cannot obtain.

CNNIC