Complex sentence: Within the NANP, a leading digit of 0 or 1 indicates special dialing arrangements such as 0-1-1 followed by a country code is used to dial internationally or 1 followed by a 10-digit phone number indicating long distance or toll charges.
Split into simpler sentences: Within the NANP, a leading digit of 0 or 1 indicates special dialing arrangements. For example, 0-1-1 followed by a country code is used to dial internationally or 1 followed by a 10-digit phone number indicating long distance or toll charges.