Level 3 Communications Inc. said it fixed an Internet-service outage that left users from Brooklyn to Philadelphia with slow to nonexistent service for nearly 24 hours Saturday after equipment at a New York-area network hub broke down.

A spokesman for the Internet-service provider said Sunday that technicians worked quickly to resolve the outage, which cascaded down to customers using Cablevision Systems Corp.'s Optimum service and Time Warner Cable Inc., among others.

...