International dialing code lookup

A length match means the number is plausible for the destination, not that it exists; the bundled lengths cover fixed-line and mobile ranges, and a few countries publish none, which the result says. Carrier-dependent exit prefixes (Brazil, Colombia, Israel and others) are marked as varying rather than guessed. Italy keeps its landline leading 0, and North American numbers dial 1 plus 10 digits with no exit prefix. Letters in vanity numbers are not converted.