The valid numbers are: 011 + 8 digits for numbers in Buenos Aires city and part of Greater Buenos Aires.

Cell phones in Argentina operate with a calling party pays (CPP) system. That means that whoever initiates the call pays for it.
Cell phones in Argentina usually start with number 15. Since calls to cellphones are more expensive than land calls in Argentina, this prefix indicates the calling party that this call is going to cost more. For instance if a user wanted to call a Buenos Aires CPP cell phone, from within Buenos Aires, they would have to dial: 15 xxxx-xxxx
Should the user want to call a cell phone in another area code, he/she would have to add the local prefix, e.g.: 011 15 xxxx-xxxx if it is a Buenos Aires cell phone
0221 15 xxx-xxxx if it is a La Plata cell phone
0341 15 xxx-xxxx if it is a Rosario cell phone
0351 15 xxx-xxxx if it is a Córdoba cell phone
0261 15 xxx-xxxx if it is a Mendoza cell phone
0381 15 xxx-xxxx if it is a Tucumán cell phone
02324 15 xx-xxxx if it is a Mercedes cell phone
03492 15 xx-xxxx if it is a Rafaela cell phone
03717 15 xx-xxxx if it is a Formosa cell phone
02901 15 xx-xxxx if it is a Ushuaia cell phone
0353 15 xx-xxxx if it is a Villa Maria, Córdoba cell phone
Non-CPP phones are available for purchase, and the calling and numbering is the same as the land numbers (non 15 ) but few users choose these numbers since that means that they would have incoming and outgoing calls deducted from their monthly minute allocation as opposed to just the outgoing.

A notable exception to this rule are the calls made from payphones, as well as the ones made from locutorios. In this case, even when dialing the 15 , the mobile party is billed for the airtime.

Phone calls from abroad to a land line (or non-CPP mobile phone), however, are dialed "normally." For example: +54 11 xxxx xxxx

However, 0610 tends to be confused with "gaming" phones, where a special 3 pesos + VAT tariff is quoted. These numbers always have to be dialed like this: 0609 xxx-xxxx

All 0800 , 0810 and 0609 have the same number countrywide. However, 0610 only can be used in the Internet Service Provider's area.

Calls to Uruguay

Calls from Argentina to Uruguay Example : 00 598 2 xxx xxx

Calls to the Falkland Islands

Although Argentina claims the Falkland Islands (Islas Malvinas ) as part of its national territory, calls are made using the Islands' country calling code, e.g: 00 500 xx xxx

Calls to Uruguay

Until 1998, calls from Argentina to Uruguay were made using domestic dialing codes. For example, to call a number in Montevideo from Argentina before 1998:

Calls to the Falkland Islands

Although Argentina claims the Falkland Islands (Spanish : Islas Malvinas ) as part of its national territory, calls are made using the Islands' country calling code, e.g:

A notable exception to this rule are the calls made from payphones, as well as the ones made from locutorios. In this case, even when dialing the 15 , the mobile party is billed for the airtime.

Phone calls from abroad to a land line (or non-CPP mobile phone), however, are dialed "normally." For example:

However, 0610 tends to be confused with "gaming" phones, where a special 3 pesos + VAT tariff is quoted. These numbers always have to be dialed like this:

Some of the reserved, toll-free special numbers are:

Emergencies:

The newer 911 dispatcher sends police from a randomly selected police station, instead of the station assigned for that specific area. This measure was added to avoid the "liberated zones" where dirty cops allow crooks to commit numerous crimes without arresting them.

Services: