(*) Two digit area codes for cities with a high telephone density. Mexico City, Guadalajara and Monterrey.
(**) Three digit area codesfor other cities and localities of the country.
The Comisión Federal de Telecomunicaciones has drawn up a strategy for the national and international dissemination of the relevant details which envisages the establishment of direct contacts with the regulatory bodies and telecommunication companies of those countries from which Mexico receives a significant volume of telephone traffic. The list of new region identification numbers will be periodically sent to those contacts to enable them to keep their information up to date and to avoid the incorrect routing of calls having a final destination within Mexico.
The new region identification numbers are listed below, together with details of the officials responsible for the project, who will be able to provide any further information that may be required. The information in question is being sent for dissemination to administrations and recognized operating agencies so that they can make the necessary changes in a timely fashion.
List of region identification numbers (RIN) that will be used in México
with effect from 10 November 2001 at 0800 hours UTC