503
Updated: 10/11/2017 by Computer Hope
503 may refer to any of the following:
1. 503 is an HTTP (hypertext transfer protocol) error code received when the server cannot handle a request because it is overloaded or undergoing maintenance. Often trying to load the page later resolves the issue.
Tip
See our HTTP definition for a listing of other HTTP error codes.
2. 503 is an area code, see our 503 area code listing for further information.