Area Code 638 – Puerto Penasco, SON
The phone area code for Puerto Penasco, SON is 638 (international format +52638). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 638
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Puerto Penasco, SON
Overview of Area Code 638
Area code 638 is a geographic numbering plan area within the Mexican state of Sonora, serving the municipality of Puerto Peñasco and its surrounding communities. This coastal city, also known as Rocky Point, is a prominent tourist destination along the Gulf of California. The area code is part of the national numbering plan administered by the Instituto Federal de Telecomunicaciones (IFT) and follows the ITU-T E.164 international dialing standard.
Geographic Coverage and Local Significance
The 638 area code covers Puerto Peñasco and nearby localities such as Playa Encanto, Las Conchas, and La Choya. It also includes rural areas and ejidos within the municipality. As a geographic code, it is tied to the PSTN infrastructure of the region, although modern services (including VoIP and mobile) may be assigned numbers from this range. The region's economy is driven by tourism, fishing, and real estate, with a growing expatriate community from the United States and Canada.
Dialing Formats and Instructions
For local calls within Puerto Peñasco, dial the 7-digit local number directly (e.g., 123-4567). For calls from other parts of Mexico, dial the national long-distance prefix 01, followed by the area code 638 and the local number: 01 638 123 4567. For international callers, dial the Mexican country code +52, then the area code (without the leading 0) and the local number: +52 638 123 4567. Note that when dialing from a mobile phone in Mexico, the national prefix 01 is often omitted, and you may simply dial 638 123 4567.
Numbering and Overlay Considerations
As of the latest IFT updates, area code 638 does not have an overlay; it is the sole area code for this region. The number length is 10 digits (including the area code) for national dialing, and 13 digits in international format (including the +52 country code). The IFT has implemented number portability, allowing users to retain their numbers when switching service providers, which applies to both fixed and mobile lines.
Practical Tips for Callers
When calling from abroad, ensure you have the correct international exit code (e.g., 011 from the US/Canada) before dialing +52. Be mindful of time zone differences: Puerto Peñasco is in the Mountain Standard Time zone (UTC-7) and observes daylight saving time aligning with the US schedule. For emergency services, dial 911 or 066. For directory assistance, dial 040.