國家通訊傳播委員會
In March 2011, the CNC (National Communications Commission, the telecommunications regulatory agency in Argentina) announced changes to be carried out in 21 local areas throughout the country. The reason being the soaring demand in mobile lines causing lines to be nearly depleted in many areas. The changes will take place in three stages, starting in November 2011 with the final cities having their numbering plan changed in April 2012. Users in these areas will have an extra 4 added in front of their subscriber's numbers as well as having the area code shortened. Thus, they will go from a (xxxx) xx-xxxx format to a more resourceful (xxx) xxx-xxxx. On 1 April, seven cities had their numbering changed as described above, thus completing the update process.