4, 5 and 6 Letter Domains for Sale: How to Buy a Short Domain (2026)

Short letter domains are sold almost entirely on the aftermarket, because nearly every clean four, five, and six-letter name was registered years ago. To buy one, search a curated marketplace by length, pick a name that is pronounceable and free of trademark conflicts, and complete the transfer through escrow. Fresh registration almost never works for short names anymore, so the practical question is not whether one is available to register, but which owner is selling and at what price.

This guide covers how short domains are priced by length, where to actually find them for sale, what a fair number looks like in 2026, and how to avoid the two mistakes that cost founders the most: paying for a name nobody can spell, and skipping escrow on a four-figure purchase.

Why are short letter domains so hard to get?

Short domains are scarce because the math is brutal. There are only 456,976 possible four-letter .com combinations and almost all are taken, so a buyable four-letter .com is genuinely rare. Five and six-letter names open up fast: six letters give millions of combinations, which is why clean six-letter names still surface regularly in the aftermarket. The short answer is that length drives availability, and each letter you add roughly multiplies your options.

That scarcity is exactly why short names hold value. A tight, memorable name is easier to say on a podcast, type from a billboard, and fit inside an app icon. Founders pay for that because it compounds over the life of the company, not because the string itself is special.

How much do 4, 5, and 6 letter domains cost?

Short domain pricing tracks length and quality more than anything else. A pronounceable four-letter .com routinely runs five or six figures; a five-letter brandable typically lands in the high hundreds to low thousands; a clean six-letter name is the most affordable of the three, often a few hundred to a few thousand dollars on a curated marketplace. The table below is a realistic 2026 range, not a fixed price list.

Length	Typical aftermarket range	Why
4 letter .com	$10,000 to six figures	Near-total scarcity; almost all are registered
5 letter .com	$500 to $5,000+	Brandable, still short, far more combinations
6 letter .com	A few hundred to a few thousand	The sweet spot: short, memorable, and findable
Short .io / .ai	$2,000 to $30,000+	Premium tech extensions carry their own premium

Pronounceability moves the number more than length alone. A five-letter name you can say once and spell correctly is worth more than a four-letter jumble of consonants. If your budget is tight, a strong six-letter name is usually the best value in the whole short-domain market. Browse what is genuinely buyable on the 6 letter domains for sale page before you set your budget.

Where can I buy 4, 5, and 6 letter domains for sale?

You buy short letter domains on the aftermarket, where current owners list them for sale, because direct registration almost never finds a clean short name. A curated marketplace gathers brandable short names in one place so you can filter by length, compare prices, and complete the purchase with escrow-backed transfer instead of chasing private owners one email at a time. That is the fastest path from "I want a short name" to actually owning one.

On BoldDomains you can browse by exact length: 4 letter domains, 5 letter domains, and 6 letter domains, or widen the net with short domains and brandable domain names. Every listing is hand picked and available to buy or lease today.

Are 4 letter domains still available?

Four-letter .com domains are effectively all registered, so they are not available to register fresh, but plenty are available to buy on the aftermarket. Owners list them for sale constantly, and pricing reflects the scarcity. If a four-letter .com is out of budget, a four-letter name on a premium extension like .io or .ai, or a clean five or six-letter .com, gives you nearly all the brand benefit for far less.

Are 5 letter domains a good investment for a startup?

Five-letter domains are one of the best balances of brand value and cost for a startup. They are short enough to be memorable and type-able, yet there are enough combinations that genuinely good names still trade in the hundreds to low thousands rather than five figures. Many of the most recognizable startup names are coined five-letter words, which is no accident: the length reads as a single unit and sticks.

What makes a short domain worth buying?

A short domain is worth buying when it passes the radio test: a stranger hears it once and can spell and find it without help. Length matters, but pronounceability, no awkward letter combinations, no hyphens or numbers, and a clear meaning matter more. A six-letter name that reads like a real word beats a four-letter string of random consonants every time, even though the four-letter one is technically shorter and rarer.

Two more checks before you buy. First, search the exact name on the US trademark database so you are not buying into a dispute. Second, say it out loud in a sentence ("I work at ___") and see if it sounds like a company. If it does, the length is doing its job.

Should I buy a short .com or a short .io / .ai domain?

Buy the short .com if you can find and afford one, because it is still the default extension US customers trust and type by reflex. If the .com is taken or out of reach, a short .io or .ai is a strong, widely accepted choice for software and AI startups, and the shorter name often matters more than the extension. The decision comes down to budget and audience: developer and AI buyers happily accept .io domains and .ai domains, while a broad consumer brand is usually better served by a slightly longer .com.

How do I buy a short domain safely?

Buy a short domain through an escrow-backed marketplace so the money and the name change hands at the same time, never one before the other. Escrow holds your payment until the domain transfers into your account, then releases it to the seller, which protects both sides on a purchase that can run into four or five figures. Avoid wiring money directly to a private seller you found through a WHOIS lookup. For the full mechanics, see how domain escrow works.

Do short domains help with SEO?

A short domain has no direct ranking advantage in Google, so do not buy one expecting an SEO boost. The real benefits are indirect but real: short names get typed correctly, shared by word of mouth, and remembered, which drives more direct traffic and better click-through over time. Pick a short domain for brand strength and recall, not for a search trick that does not exist.

What is the cheapest way to get a short domain?

The cheapest reliable way to get a short domain is to buy a clean six-letter name on the aftermarket, since six-letter names are the most plentiful of the short lengths and routinely list for a few hundred to a few thousand dollars. If even that is over budget, look at lease-to-own, which spreads the cost into monthly payments so you can launch on the name now and own it over time. See lease to own domains for how the payment plan works.

Finding your short domain

Start with the length that fits your budget, not the rarest one you can imagine. Six letters is the value sweet spot, five letters is the brandability sweet spot, and four letters is a splurge that only makes sense when the name is genuinely perfect. Run a handful of candidates through the radio and trademark checks, then buy through escrow. A short, sayable name you actually own beats a shorter one you can only admire.

When you have your name, the next steps are setting up email and getting the books in order. If you will be invoicing clients, a tool like rankable.ai can keep your new site producing content on autopilot, and a service such as signsend.com handles the contracts and transfer paperwork that come with a serious domain purchase. For founders who plan to run outreach from the new domain, coldmailer.ai sends personalized cold email at scale from your own address.

Ready to look? Browse six-letter domains for sale, compare a few five-letter names, and search the full catalog of short domains and premium domains to find the one that sounds like your company.