What is 543 area code?

The 543 area code is a telephone area code in the North American Numbering Plan (NANP) for the U.S. state of Oregon. It serves as an overlay for the 503 area code, covering the same geographic region. This region includes the Portland metropolitan area and much of northwest Oregon. As an overlay code, 543 was implemented to address the dwindling supply of available phone numbers in the 503 area.

Here's a breakdown of important aspects:

• Geography: The 543 area code covers the same area as the 503 area code.

• Purpose: Its primary purpose is number relief for the 503 area.

• Implementation: 543 is an overlay area code, meaning both 503 and 543 numbers can exist within the same geographic area and require 10-digit dialing.