DNS CNAME

A CNAME record (Canonical Name) is a DNS entry that aliases one (sub)domain to another. Classic use case: you own yourbrand.com and want go.yourbrand.com to serve short links. You create a CNAME that points the subdomain at the shortener provider's servers.

Important to know: CNAME only works for subdomains, not for the root domain (e.g., yourbrand.com itself). For the apex domain you need an A record, ALIAS record, or ANAME record — depending on what your DNS provider supports.

Setting up a custom domain on promolinks.net comes with a step-by-step guide: the exact CNAME target, the recommended TTL, and how to configure it in Cloudflare, GoDaddy, Namecheap, or Route 53.