CNAME Record

A CNAME (Canonical Name) record is a type of DNS entry that maps one domain name to another. Instead of pointing a subdomain directly to an IP address (as an [A record](/glossary/dns) does), a CNAME creates an alias that resolves to the target domain's IP. When a browser looks up your subdomain, the DNS system follows the CNAME pointer to the canonical domain and then resolves that domain's A record to reach the final IP address. CNAMEs are commonly used to connect custom subdomains to third-party hosted services like content platforms, CDNs, and SaaS applications.

Branded URLs build trust and reinforce your identity. Sharing a flipbook from a generic hosted domain looks less professional than serving it from your own subdomain. CNAME records make this possible without moving your hosting or managing additional servers. They also future-proof your setup: if the service provider changes its infrastructure or IP addresses, your CNAME still points to the correct domain name, so nothing breaks on your end. For publishers who distribute content across multiple channels, a branded subdomain strengthens recognition and keeps analytics clean.

FlipLink's [Custom Domains](/features/custom-domains) feature uses CNAME records to connect your subdomain to FlipLink's servers. You add a CNAME record in your DNS provider pointing your chosen subdomain (such as docs.yourbrand.com) to FlipLink's designated endpoint. Once the DNS propagates, FlipLink automatically provisions an SSL certificate for your subdomain. All your publications then become accessible under your branded URL. There is no limit on the number of custom domains you can connect, and the setup requires no code changes on your end. CNAME-based domains are also required if you want to enable [sale mode](/glossary/sell-documents) and sell flipbooks under your own brand.