The snappily named E.164 protocol, or ENum, maps phone numbers to internet addresses and should make it much easier to contact people, provided you have at least one reliable way of reaching them. When a phone number is entered into a computer, the number is linked to diverse communication services such as a VoIP client like Skype, email, fax, mobile phones or instant messaging programmes, allowing you to contact them instantly. Impressive and mindboggling stuff!
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