hexadecimal is used, because the conversion is almost free (as oposed to decimal...

		dfox on Feb 9, 2011 \| parent \| context \| favorite \| on: The most common phone number: 214-748-3647 hexadecimal is used, because the conversion is almost free (as oposed to decimal) Also, phone numbers (for last 50 years or so) actually are hexadecimal strings (with extra characters - denoted ABCD*# - reserved for various special purposes).