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ProgrammableWeb.com keeps you up to date with web mashups and APIs: what

North American Numbering Plan NPA NXX databases. Complete coverage of all active North American telephone area code and central office local exchange prefix assignments.

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Web services that validate, update, correct and enhance contact information in real-time within any application.

The Award Winning Business Phone Service over the Internet. OnSIP business VoIP service is a hosted pbx system that allows you to streamline your business communications. There’s no phone company hassle, no phone system to buy or manage, no contracts