← Back to blog
· bah.is Team

What Is a Custom Short Domain and Why Should You Care?

A custom short domain like link.yourco.com puts your brand on every link you share. Here's what it is, how to set it up, and when you actually need one.

When you shorten a link with most URL shorteners, the resulting link lives on their domain. bit.ly/xyz123. tinyurl.com/abc. Even with a clean slug, someone else’s brand is in your URL. When you consider how generic shorteners compare to bah.is, the difference becomes even more stark.

A custom short domain changes that. Instead of bah.is/your-link, your link looks like go.yourco.com/your-link or lnk.yourbrand.io/your-link. Every link you share carries your brand, not someone else’s.

Here’s everything you need to know.

What Is a Custom Short Domain?

A custom short domain is a short domain name that you own and configure to power your short links. Examples:

  • go.acme.com — a subdomain of your main domain
  • acme.link — a dedicated short domain
  • link.yourco.com — another common subdomain pattern

When someone clicks a link at that domain, they’re redirected to the destination — same as any short link. The only difference is that the domain is yours.

This means:

  • Brand recognition — your name appears in every link, in every context
  • Trust signals — recipients know before clicking who sent the link
  • No dependency on a third-party domain — even if you switch link management tools, links on your domain continue to work

Why Custom Domain Trust Matters More Than You Think

Consider the difference between these two links in an email:

  • bit.ly/new-report
  • go.acme.com/new-report

The second one tells the recipient immediately who it’s from. That context makes them more likely to click. For established brands with existing audience trust, branded short links deliver 34% higher CTR than generic alternatives.

For enterprise use cases — sales emails, investor relations, customer communications — a custom domain is often a baseline expectation. Sharing a generic shortened link in a formal business context reads as unprofessional. This is especially critical for email deliverability, where third-party short domains can trigger spam filters.

How to Set Up a Custom Short Domain (Without an Engineering Team)

Setting up a custom short domain takes about 20 minutes and requires access to your domain’s DNS settings. Here’s the general process:

Step 1: Choose Your Short Domain or Subdomain

Options:

  • Subdomain of your existing domain: go.yourco.com, link.yourco.com, l.yourco.com. No additional domain registration required.
  • New short domain: Register a short domain (ideally 6-10 characters) and use it entirely for links.

Step 2: Add a CNAME Record

In your DNS provider (Cloudflare, Route 53, Namecheap, etc.), add a CNAME record pointing your chosen subdomain to the link management service’s domain. For bah.is, this would be documented in your account settings.

Type: CNAME
Name: go (for go.yourco.com)
Value: custom.bah.is (or the value your link tool provides)
TTL: Auto

For detailed guidance, see Cloudflare’s CNAME documentation.

Step 3: Configure in Your Dashboard

After DNS propagates (usually within minutes on Cloudflare, up to 48 hours on slower registrars), verify the domain in your link management dashboard and start creating links on your custom domain.

A Note on Cloudflare

If your domain is on Cloudflare, the setup is particularly smooth. Cloudflare’s proxy handles SSL automatically, DNS propagation is near-instant, and you can manage everything from one interface. It’s the recommended setup for most users.

When You Need a Custom Domain vs When bah.is Is Enough

Not everyone needs a custom short domain. Here’s a practical breakdown:

bah.is works great for:

  • Personal use and individual creators
  • Small businesses and startups without an established brand identity
  • Internal links and team link sharing
  • Testing campaigns before investing in branded infrastructure
  • Situations where link volume doesn’t justify the setup overhead

A custom domain makes sense when:

  • You’re a recognized brand where trust in the sender matters
  • You send high-volume external communications (sales, marketing, investor emails)
  • You want protection from link rot if you change link management tools
  • Your audience associates a shortened URL with spam and needs the brand context
  • Compliance or enterprise requirements mandate it

The honest answer is that for most users — individuals, small businesses, content creators — bah.is/your-slug is entirely sufficient. It’s short, clean, and professional. The step to a custom domain is worth taking when the brand recognition payoff is real.

The Bottom Line

A custom short domain is a branding investment that pays off most when you have an audience that recognizes and trusts your name. It’s not necessary for everyone, but when it matters, it matters a lot.

If you’re not there yet, start with bah.is and grow into a custom domain when the time is right. The setup is straightforward enough that you can make the switch in an afternoon.

Start with bah.is for free →