Area Code 66 – Ayacucho

Overview of Peru Area Code 66

Area code 66 is a geographic National Destination Code (NDC) assigned to the Ayacucho region in south-central Peru. It covers the city of Ayacucho (the regional capital) and surrounding provinces, including Huamanga, Huanta, La Mar, and Vilcashuamán. This code is used for fixed-line (PSTN) services within the region, as well as for some local VoIP and wireless local loop services that are geographically tied to the area.

Dialing Formats

For callers within Peru, the national trunk prefix 0 is used before the area code, followed by the subscriber number. The complete national format is (01) 66 XXX XXX when dialed from other regions in Peru (the leading 0 is dropped when dialing from abroad). For international callers, the country code +51 is used, followed by the area code without the leading 0: +51 66 XXX XXX. For example, a local number in Ayacucho might be dialed as 066 123456 domestically from outside the region, or +51 66 123456 from overseas.

Geographic Coverage and Administration

The 66 code is administered by the Peruvian Ministry of Transport and Communications (MTC) and is allocated to fixed-line operators such as Telefónica del Perú (Movistar) and other regional carriers. The region is characterized by its highland geography, and the numbering plan follows the national 9-digit format (including the leading 0 for domestic calls). Subscriber numbers under this code typically have 6 digits, making the total number length 9 digits when including the area code (without the trunk prefix).

Overlay and Numbering Considerations

Currently, there is no overlay code for Ayacucho; the 66 code is unique to the region. However, with the growth of telecommunications services, the MTC has implemented number portability for fixed lines, allowing subscribers to retain their numbers when switching operators. This means that a number starting with 66 may be served by any licensed operator, not necessarily the original one.

Caller Instructions

• Local callers (within Ayacucho): Dial only the 6-digit subscriber number (e.g., 123456).
• National callers (from other regions in Peru): Dial 0, then 66, then the subscriber number (e.g., 0 66 123456).
• International callers: Dial the international access code (e.g., 00 from many countries), then Peru's country code 51, then 66, and the subscriber number (e.g., 00 51 66 123456 or +51 66 123456).

When dialing from a mobile phone in Peru, the national format is typically used, but the leading 0 may be omitted depending on the operator. Always check with your service provider for exact dialing procedures.