E.164

E.164 is an international standard for phone numbers that ensures they are formatted consistently worldwide. It assigns unique numbers to each phone line, starting with a country code (like +1 for the US or +44 for the UK), followed by the local number. This standardization allows phones and networks across different countries to recognize and route calls accurately, regardless of where they are made or received. Essentially, E.164 makes global communication reliable by providing a universal format for phone numbers.