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ZIP Code 04101 - Portland, MAINE

Detailed information about ZIP code 04101 located in Portland, Maine. This postal code covers standard areas with a population of 10,260 residents.

About 04101 ZIP Code Area

The ZIP code 04101 is part of the USPS (United States Postal Service) system serving the Portland area. This code ensures efficient mail delivery and geographic organization within Maine.

City Name Zip Code Type Population
Portland, ME PRIMARY 04101 STANDARD 10.260
City Name Zip Code Type
Portland, ME PRIMARY 04101 STANDARD
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Definitions of Status

  • PRIMARY: Refers to the main name of the city, typically its official designation. Although the city might have an ACCEPTABLE alternative name, the primary name remains the official one.
  • ACCEPTABLE: Indicates a suitable alternative city name. Commonly abbreviated city names are often listed as unacceptable because abbreviations are not considered an acceptable city name format.
  • IMPROPER/NOT ACCEPTABLE: Denotes that an inappropriate city name was entered or received based on the provided information.
  • UNIQUE: Assigned to a business, government agency, or entity with a significant mail volume. This designation depends on the average daily volume of letter-sized mail received, the availability of ZIP code numbers in the postal area, and a cost-benefit analysis by the postal service.