Area Code 331 – Adventure/Joanna

Geographic Coverage and Administrative Jurisdiction

Area code 331 is a geographic National Destination Code (NDC) assigned within the Guyana numbering plan, serving the Adventure/Joanna region. This area falls under the administrative jurisdiction of the Essequibo Islands-West Demerara region of Guyana, located along the western bank of the Demerara River. The code covers the communities of Adventure, Joanna, and their immediate environs, which are primarily residential and agricultural areas. The region is part of the larger Demerara-Mahaica economic corridor, with close ties to the capital, Georgetown, located directly across the river.

Dialing Formats and Caller Instructions

For callers within Guyana, dialing a local number in the Adventure/Joanna area requires the full 7-digit number prefixed by the area code, even for calls made from within the same region. The standard national dialing format is: 331 XXXX (where XXXX is the 4-digit subscriber number). For example, to reach a local line, you would dial 331 4567.

For international callers, the Guyana country code (+592) must be used, followed by the area code and subscriber number, without any leading trunk prefix. The international format is: +592 331 XXXX. For instance, a caller from the United States or the United Kingdom would dial +592 331 4567 to reach a fixed-line subscriber in Adventure/Joanna.

Numbering Plan Considerations

Guyana's national numbering plan follows the ITU-T E.164 recommendation, with a maximum length of 10 digits for international format (including country code). Geographic area codes in Guyana are assigned to fixed-line services, typically provided by the incumbent operator, Guyana Telephone and Telegraph Company (GTT). As of the latest updates, there are no overlay codes in this region; the 331 code is exclusively used for the Adventure/Joanna area. However, number portability may allow subscribers to retain their numbers when switching between fixed-line operators, though this is less common for geographic services.

When dialing from a mobile phone within Guyana, the same national format applies. It is important to note that Guyana uses a closed dialing plan, meaning the area code must always be dialed, even for local calls. This ensures proper routing and avoids ambiguity with other regions.

Practical Usage and Tips

For businesses or individuals in Adventure/Joanna, it is essential to include the area code in all printed materials, websites, and international directories. When receiving calls from abroad, the caller should be advised to use the +592 prefix. For local callers, omitting the area code will result in a failed call. As Guyana continues to modernize its telecommunications infrastructure, VoIP and mobile services are expanding, but the geographic numbering system remains a reliable indicator of location for fixed-line services.