This is the full library of plain-English, source-backed guides on tlddomain.us. Start with the basics, compare extensions head to head, learn how to choose and register a domain, or dig into the technical machinery of the Domain Name System. Everything here is grouped by topic so you can read in order or jump straight to your question.
These guides explain top-level domains (TLDs) and domain extensions from every practical angle: what they are, how the main types differ, how to pick the right one for a business, blog or startup, how registration and WHOIS work, and how the wider DNS hierarchy fits together. They are written for clarity, kept current, and cite primary sources such as IANA and ICANN.
Not sure where to begin? If domains are new to you, read what is a TLD first, then TLD vs domain name and gTLD vs ccTLD. If you already know the basics and just need to pick an extension, jump to how to choose a domain extension or one of the “best TLD for…” guides below. Each guide ends with sources and links to closely related topics, so you can follow the thread wherever your question leads.
Last updated · Independently published by Mustafa Bilgic · Sources: IANA, ICANN, registry operators
The definition, where the TLD sits in a web address, and the main TLD types.
Read the guide →The meaning of “TLD,” why it matters, and how it relates to domain extensions.
Read the guide →The whole registered name versus its ending — the difference, made clear.
Read the guide →The everyday name for a TLD: meaning, types, and how to pick one.
Read the guide →The label you choose versus the extension it sits under.
Read the guide →Prefixes like blog.example.com — how they work and when to use them.
Read the guide →The registered address versus the full address of a specific page.
Read the guide →Generic top-level domains — open and themed extensions like .com and .app.
Read the guide →Country-code extensions tied to a nation, such as .us, .uk and .de.
Read the guide →Generic versus country-code: what each signals and when to use which.
Read the guide →Restricted extensions run for a community, like .edu and .gov.
Read the guide →How the 2012 ICANN program added hundreds of extensions like .shop and .blog.
Read the guide →Extensions owned by one company, such as .google and .bmw.
Read the guide →How ccTLDs map to ISO codes, domain hacks, and local rules.
Read the guide →Domains in non-Latin scripts — Arabic, Chinese, Cyrillic — and Punycode.
Read the guide →City and region extensions like .nyc, .london and .berlin.
Read the guide →Clever URLs like del.icio.us that spell a word across the dot.
Read the guide →Two classic extensions compared on trust, SEO, availability and price.
Read the guide →Why a Caribbean territory's code became the home of tech and startups.
Read the guide →Anguilla's country code, now the obvious extension for AI products.
Read the guide →Colombia's code sold as “company” — and the type-in risk to weigh.
Read the guide →The startup-favorite tech extension weighed against the .com default.
Read the guide →Nonprofit signal versus universal trust — which extension fits your mission.
Read the guide →The nonprofit-associated TLD that anyone can register — meaning and rules.
Read the guide →From network infrastructure to the leading alternative when .com is taken.
Read the guide →The big, cheap, meaning-neutral new gTLD used by Alphabet and Web3.
Read the guide →Google's developer TLD — and why every .dev site must use HTTPS.
Read the guide →A secure-by-default extension built for apps and software products.
Read the guide →Montenegro's code, sold worldwide for portfolios and personal sites.
Read the guide →A descriptive extension for technology companies, products and events.
Read the guide →A purpose-built extension for online stores and e-commerce brands.
Read the guide →A descriptive retail extension for shops, brands and online sellers.
Read the guide →A broad, memorable new gTLD for any business or project on the web.
Read the guide →A flexible, generic extension for websites of every kind.
Read the guide →The descriptive TLD made for bloggers, writers and publications.
Read the guide →One of the original new gTLDs, built for informational websites.
Read the guide →A business-only extension, who can register it, and when it fits.
Read the guide →A community-focused TLD for groups, clubs, teams and memberships.
Read the guide →An extension built for streaming, events and real-time content.
Read the guide →A practical framework: brand fit, trust, geotargeting, price and traps.
Read the guide →Step by step: registrars, availability, pricing, renewals and privacy.
Read the guide →The company you buy a domain from — what it does and how to choose one.
Read the guide →The public record of who registered a domain, privacy, and RDAP.
Read the guide →Why some names cost far more, how premiums are set, and whether to pay.
Read the guide →Real prices by extension, the renewal trap, premiums and hidden extras.
Read the guide →Move a domain between registrars with the auth code — without downtime.
Read the guide →The grace, redemption and drop lifecycle — and the risks of buying one.
Read the guide →The wholesale operator of a TLD versus the retailer you buy from.
Read the guide →The organization that operates a TLD and holds its master database.
Read the guide →How to find genuinely low-cost extensions — and avoid the renewal trap.
Read the guide →How privacy protection hides your personal details from the public record.
Read the guide →The grace, redemption and drop timeline — and how to recover a lapsed name.
Read the guide →What Google actually says about extensions, geotargeting and trust.
Read the guide →When .com wins, when a ccTLD or niche gTLD beats it, and how to decide.
Read the guide →Choosing between .com, .blog, .me and niche options for a personal site.
Read the guide →Weighing .com against .io, .ai and .co for an early-stage company.
Read the guide →Choosing the right domain for an online store: .com, .shop, .store and more.
Read the guide →When .org wins, and where .ngo, .charity and a ccTLD make sense.
Read the guide →Extensions for creatives and professionals: .me, .design, .com and beyond.
Read the guide →A practical 8-step framework for picking a name that is short and memorable.
Read the guide →From the root zone down to your domain: how name resolution happens.
Read the guide →ICANN, IANA and registries — who sets policy and runs each extension.
Read the guide →The internet's address book that turns names into IP addresses.
Read the guide →The step-by-step journey from your browser to the authoritative server.
Read the guide →The machines that answer DNS queries — authoritative vs recursive.
Read the guide →The 13 identities at the top of DNS, and how anycast scales them.
Read the guide →The complete, unambiguous name of a host — every label up to the root.
Read the guide →How *.example.com matches all subdomains in DNS and SSL at once.
Read the guide →How Unicode domains become the xn-- ASCII the DNS understands.
Read the guide →The non-profit that coordinates domain names and sets TLD policy worldwide.
Read the guide →The authority that maintains the root zone and the official list of TLDs.
Read the guide →How cryptographic signatures protect DNS answers from tampering.
Read the guide →Inside ICANN's application process for launching a brand-new extension.
Read the guide →From the first .com in 1985 to today's 1,500+ extensions.
Read the guide →If you are new to the subject, begin with “What is a TLD?” then “TLD vs domain name” and “gTLD vs ccTLD.” From there, move to choosing and registering an extension. The guides are grouped by category so you can jump straight to what you need.
Yes. Every guide on tlddomain.us is free, independently published, and supported by advertising. There is no paywall and no sign-up required.
Each guide carries a “last updated” date and cites primary sources such as IANA and ICANN. Domain facts and figures are described as approximate where they change over time, and we revise the guides as the landscape evolves.
No. tlddomain.us is an educational reference about top-level domains and domain extensions, not a registrar. We explain how registration works and what to look for, then you register through a registrar of your choice.
What it really takes to run your own top-level domain through ICANN.
Read the guide →Drop-catching, auctions and backorders explained.
Read the guide →Renting a domain name instead of buying it outright.
Read the guide →Moving a domain you own vs rescuing a lapsed one.
Read the guide →How root and TLD nameservers resolve every domain.
Read the guide →Decentralized naming outside the traditional DNS root.
Read the guide →ENS/.eth, Unstoppable and how they differ from real DNS.
Read the guide →Brand TLDs and private roots — what is actually possible.
Read the guide →Legacy extensions vs the 2012 new-gTLD wave.
Read the guide →TLD, second level and subdomains in the hierarchy.
Read the guide →The everyday name for TLDs, demystified.
Read the guide →The three R’s of the domain world and who does what.
Read the guide →Start with the fundamentals, then work toward choosing and registering the perfect domain.
Read: What is a TLD? →