What Is IP Canonicalization and Why Does It Matter for SEO?
Every website lives on a server with a physical IP address — a numeric identifier like 123.45.67.89. Most users access a website through its domain name (example.com), but anyone can type the raw IP address directly into a browser and load the same content. When this happens without a redirect in place, Google sees two distinct URLs serving identical content: your domain and your IP address.
The Duplicate Content Problem
Google treats each unique URL as a separate page. If your website is accessible via both https://example.com and http://123.45.67.89, Google may index both versions. This creates a duplicate content issue — the same page exists at two addresses. Google will pick one to rank and may suppress the other. More critically, backlinks pointing to either version split your PageRank instead of consolidating it on your canonical domain.
Who Is Most at Risk?
Websites on shared hosting are at higher risk because their IP address may be shared with hundreds of other sites — but the default virtual host can still load your content. Websites that recently migrated servers, changed hosting providers, or launched without a full technical SEO audit are also commonly missing IP canonicalization. A free IP canonicalization test takes under five seconds and can immediately identify whether this issue affects your site.
Google's Own Guidelines
Google's technical SEO documentation lists IP canonicalization as a best practice. The Google Search Central canonicalization guide specifically recommends ensuring your IP redirects to your preferred domain to avoid duplicate content signals and consolidate ranking authority.