Is there a standard for storing normalized phone numbers in a database?

Question

What is a good data structure for storing phone numbers in database fields? I\'m looking for something that is flexible enough to handle international numbers, and also som

Answer 1

User friendly: +44 (0)181 464 2542 normalised: 00441814642542

The (0) is not valid in the international format. See the ITU-T E.123 standard.

The "normalised" format would not be useful to US readers as they use 011 for international access.