Sunday, February 8, 2026

No more prefixes as telephone dialing changes now in effect

A new and simplified 10-digit telephone dialing system takes effect in Mexico today but the existing system won’t be phased out completely until August 3, 2020.

All telephone prefixes are eliminated under the new system, which was first announced by the Federal Telecommunications Institute (IFT) in the fall of 2017.

That means that dialing the prefix 01 for national long-distance calls or non-geographical numbers (think 01-800 numbers) is no longer required.

Similarly, the prefixes 044 and 045 don’t need to be dialed to make local and long-distance calls, respectively, to a mobile phone from a landline.

To make a long-distance call from abroad to a mobile number in Mexico the prefix 1 is no longer required after the country code.

While all prefixes are eliminated, two or three-digit area codes are added when making local calls to create a uniform 10-digit system.

In Mexico City, Guadalajara and Monterrey, the corresponding two-digit area code is added to make a call within the city, while across the rest of the country, three-digit area codes are added.

An exception to the 10-digit system is the national emergency number, which remains 911.

The IFT had planned to give telephone users just one month to adjust to the new dialing system before eliminating the existing one.

However, the institute announced last month that people will be able to continue to use the numbers to which they are accustomed for a period of one year from today.

Telecommunications analyst Jorge Bravo said that having a one-year period in which both new and old numbers can be used is normal.

However, he warned that the public will need to be reminded about the new dialing system in the lead-up to the definitive elimination of prefixes on August 3, 2020.

Source: El Universal (sp) 

Have something to say? Paid Subscribers get all access to make & read comments.
President Sheinbaum in front of a large seal reading Estados Unidos Mexicanos

Mexico’s week in review: Cuba dispute escalates as Mexico faces security challenges at home

2
The honeymoon phase of Sheinbaum's presidency may coming to a close, with pressure ramping up over security problems at home and diplomatic disputes with the US abroad during the first week of February.
The Rio Grande runs along the Mexican border through Big Bend National Park

Mexico commits to make yearly water deliveries to US after tariff threats

1
The 1944 water treaty remains in force, with Mexico agreeing to take steps to avoid a repeat of the recent non-compliance issues by making yearly minimum water deliveries.

Puebla students build nanosatellite to keep Mexico safe from volcanic eruptions

0
A team of Puebla college students just launched a satellite to monitor Popocatépetl, Mexico's most dangerous active volcano, from space.
BETA Version - Powered by Perplexity