Area Code 28 – Trelew/Rawson, Chubut
The phone area code for Trelew/Rawson, Chubut is 28 (international format +5428). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 28
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Trelew/Rawson, Chubut
Geographic Coverage and Administrative Jurisdiction
The Argentine national destination code (NDC) 28 is a geographic area code assigned to the Chubut Province in the Patagonian region of southern Argentina. Specifically, this code covers the northeastern coastal zone of the province, including the cities of Trelew, Rawson (the provincial capital), Puerto Madryn, and their surrounding localities. The code 28 is part of the national numbering plan administered by the Ente Nacional de Comunicaciones (ENACOM), following ITU-T E.164 recommendations.
Primary Cities and Localities Served
- Trelew – the largest city in the region, an important commercial and industrial hub.
- Rawson – the capital of Chubut Province, seat of the provincial government.
- Puerto Madryn – a major coastal city and gateway to the Valdés Peninsula, a UNESCO World Heritage site.
- Smaller towns such as Gaiman, Dolavon, and Puerto Pirámides are also included within this geographic area.
Dialing Formats
To call a fixed-line number in the Trelew/Rawson area, the subscriber number is 7 digits long. The complete national significant number (NSN) is 10 digits, comprising the trunk prefix 0, the area code 28, and the 7-digit subscriber number.
National dialing (from within Argentina):
Dial 0 28 XXXX XXXX (replace X with the local subscriber number).
International dialing (from outside Argentina):
Dial your country's exit code, then 54 28 XXXX XXXX.
Local dialing (within the same area code):
Dial only the 7-digit subscriber number: XXXX XXXX.
Overlay and Numbering Considerations
Currently, there is no overlay code for the 28 area. However, the region also uses mobile prefixes (e.g., 280) for cellular services, which are non-geographic and assigned to mobile operators. When calling a mobile number, the same international format applies, but the prefix 280 is not part of the geographic code 28 for fixed lines.
Caller Instructions
- Local callers within the 28 area can dial the 7-digit number directly.
- Callers from other Argentine provinces must dial the trunk prefix 0, then 28, followed by the subscriber number.
- International callers must drop the trunk prefix 0 and dial Argentina's country code 54, then 28, and the subscriber number.
Understanding the correct dialing format ensures seamless connectivity to businesses and residents in the Chubut region.