This page list all mirrors repositories for central repositories. repo.maven.apache.org points to repo1.maven.org, which is a globally balanced CNAME that will direct you to the closest mirror for highest performance. Read more about the details here: http://www.sonatype.com/people/2011/07/the-central-repository-is-getting-faster-are-you-ready-for-the-new-ips/
Please read http://maven.apache.org/guides/mini/guide-mirror-settings.html for how to configure a mirror with Maven.
Globally balanced urls for Central
United States, California
(this is a globally balanced dns, the same as repo1)
Mirrors Repositories Pushed Directly from Central
United States, North Carolina
Independent Proxies of Central