Localhost 11501 New [2021]

Users have reported "localhost not working" issues following major system updates, such as the October 2025 cumulative updates for Windows. Staying on top of security patches, like KB2267602 , can often resolve binding errors.

A Next.js 15 app. But instead of 3000 , it runs on 11501 . She aliased it in package.json : "dev": "next dev -p 11501" . No reason except that her .config/postgres already uses 5432 and her Redis uses 6379 . She wanted a port that would never appear in a tutorial—forcing her to actually read her own URLs. localhost 11501 new

In most cases, is associated with specialized local services or development environments. Notably, it is a known access point for: Users have reported "localhost not working" issues following