Colombia operates a closed dialing plan, with all fixed line and mobile subscriber numbers being 10-digit.
[1] Nationally, all calls between subscribers are dialed as ten digits, with no prefix.
Prior to September 2021, Colombia had fixed line subscriber numbers that comprised a single digit dialing zone and a 7-digit local number.
There were various dial plans, with different access prefixes depending on the type of service.
Calling internationally from Colombian landlines requires a carrier-selection code be included after the 00 IDD prefix, before the country code and foreign subscriber number: As with landlines, calls from mobile phones to both landline and mobile numbers are placed by dialing the 10-digit subscriber number with no prefix.