The official two-letter postal abbreviation for Massachusetts is MA. This code is mandated by the United States Postal Service (USPS) for all mail sorting, shipping logistics, and official correspondence.
If you're filling out legal forms, shipping a package to Boston, or updating your billing details, using the correct code prevents delivery delays and system errors. While older shorthand like "Mass." or "Mass't" appears in historical texts, modern automated systems require the standard capitalization and format without periods.
Understanding the MA Postal Code
The standardization of two-letter state codes by the USPS in 1963 transformed how mail moves across the country. Before automation, postal clerks read longhand state names, which frequently caused sorting bottlenecks and misrouted mail.
The code MA derives directly from the first two letters of Massachusetts. Unlike states with names starting with identical letters (such as Maine or Maryland, which use ME and MD respectively), Massachusetts retained the historical two-letter prefix. For another angle on this story, check out the recent update from Reuters.
Postal Standards and Formatting
When addressing mail or entering data into digital databases, formatting rules matter.
- Use uppercase letters only: MA.
- Omit periods (avoid writing M.A.).
- Place the code immediately after the city name and a single space, followed by the five-digit ZIP code.
For example, a standard address line reads:
Boston, MA 02108
Massachusetts Geographic and Administrative Codes
Beyond the primary postal abbreviation, Massachusetts relies on several other numeric and alphanumeric codes for identification, taxation, and logistics.
Federal Information Processing Standards (FIPS) Codes
Federal agencies use FIPS codes to represent states and counties for statistical data collection. The numeric FIPS code for Massachusetts is 25, and the ANSI code follows the same standard. County-level FIPS codes add a three-digit suffix, such as 25025 for Suffolk County.
Telephone Area Codes
Massachusetts covers several distinct area codes managed by the North American Numbering Plan. Depending on the region, phone numbers use prefixes like:
- 617 and 857 for Boston and immediate surrounding suburbs.
- 508 and 774 for Central and Southeastern Massachusetts (including Worcester and Cape Cod).
- 413 for Western Massachusetts (including Springfield and Pittsfield).
- 978 and 351 for Northeastern and North-Central Massachusetts.
Vehicle Registration and RMV Codes
The Massachusetts Registry of Motor Vehicles (RMV) issues license plates that incorporate the MA designation alongside unique serial numbers. Standard passenger plates often feature the state name or abbreviation, and vehicle titles require the state code for national database lookups through the National Motor Vehicle Title Information System (NMVTIS).
Common Mistakes with MA State Codes
Even though the code is short, simple errors routinely cause database rejections or shipping failures.
- Confusing ME and MA: Maine (ME) and Massachusetts (MA) are frequently swapped on quick data entry forms, resulting in misrouted shipments to northern New England.
- Adding Periods: Modern e-commerce checkouts and shipping APIs often throw validation errors if users type periods (M.A.) into the state field.
- Using Obsolete Shorthand: Entering "Mass" instead of "MA" in strict database fields can cause form submission failures.
Frequently Asked Questions
Is "Mass." still acceptable for mailing addresses?
No. The USPS requires the two-letter uppercase abbreviation MA for automated optical character recognition (OCR) sorting machines. Using "Mass." can slow down mail processing.
What is the numeric code for Massachusetts?
The numeric FIPS code for the state is 25. If you are looking up ZIP codes, they range from 01001 in Agawam up to 02791 in Westport.
Does MA stand for anything besides Massachusetts?
In postal and geographic terms, MA exclusively refers to Massachusetts. In other contexts, it can stand for Master of Arts, Milliamps, or Massachusetts Avenue, but context prevents confusion in addressing systems.
