213 Secondary Address Unit Designators - Postal Explorer - USPS

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SearchSearch Skip side navigation Toggle navigation Publication 28 - Postal Addressing Standards
  • Publication 28 - Postal Addressing Standards
  • Introduction
    • 11 Background
      • 111 Purpose
      • 112 Scope
      • 113 Additional Benefits
    • 12 Overview
      • 121 List Maintenance
      • 122 List Correction
      • 123 Updates
      • 124 Address Output
      • 125 Deliverability
  • 2 Postal Addressing Standards
    • 21 General
      • 211 Standardized Delivery Address Line and Last Line
      • 212 Format
      • 213 Secondary Address Unit Designators
      • 214 Attention Line
      • 215 Dual Addresses
    • 22 Last Line of the Address
      • 221 City Names
      • 222 Punctuation
      • 223 Spelling of City Names
      • 224 Format
      • 225 Military Addresses
      • 226 Preprinted Delivery Point Barcodes
    • 23 Delivery Address Line
      • 231 Components
      • 232 Street Name
      • 233 Directionals
      • 234 Suffixes
      • 235 Numeric Street Names
      • 236 Corner Addresses
      • 237 Highways
      • 238 Military Addresses
      • 239 Department of State Addresses
    • 24 Rural Route Addresses
      • 241 Format
      • 242 Leading Zero
      • 243 Hyphens
      • 244 Designations RFD and RD
      • 245 Additional Designations
      • 246 ZIP+4
    • 25 Highway Contract Route Addresses
      • 251 Format
      • 252 Leading Zero
      • 253 Star Route Designations
      • 254 Additional Designations
      • 255 ZIP+4
    • 26 General Delivery Addresses
      • 261 Format
      • 262 ZIP Code or ZIP+4
    • 27 United States Postal Service Addresses
      • 271 Format
      • 272 ZIP Code or ZIP+4
    • 28 Post Office Box Addresses
      • 281 Format
      • 282 Leading Zero
      • 283 Designations
      • 284 PO Box Street Addressing
      • 285 Private Mailbox Addresses
    • 29 Puerto Rico Addresses
      • 291 Format
      • 292 Urbanization
      • 293 Common Translations
      • 294 Spanish Directionals
      • 295 Delivery Address Line
  • 3 Business Addressing Standards
    • 31 General
      • 311 Joint Industry and Postal Service Standardization Efforts
      • 312 Unique Addressing Issues
      • 313 Business Address Standardization Factors
      • 314 Purpose of Standardization
    • 32 Scope of Standardization
      • 321 Benefits
      • 322 Business-to-Business List Maintenance
      • 323 Business-to-Business List Correction
      • 324 Business-to-Business List Updates
      • 325 Business-to-Business Address Output
      • 326 Business-to-Business Deliverability
    • 33 Defining Business-to-Business Data Elements
    • 34 Line Removal Guidelines
      • 341 Sample Business Address Format
      • 342 Primary Considerations
      • 343 Address Line Removal
    • 35 Address Data Element Compression Guidelines
      • 351 Removal and Deletion Restrictions
      • 352 Abbreviations
      • 353 Right-to-Left Evaluation
      • 354 Special Characters
      • 355 Remove Certain Words
      • 356 Wrapping
      • 357 Line #9 Compression
      • 358 Standard State Name Abbreviations
      • 359 Other Considerations
  • Appendix A
    • A1 Readability
    • A2 Address Types
    • A3 International Addresses
      • A31 General Requirements
      • A32 Canada Only
  • Appendix B
  • Appendix C
    • C1 Street Suffix Abbreviations
    • C2 Secondary Unit Designators
  • Appendix D
    • D1 Hyphenated Address Ranges
    • D2 Grid Style Addresses
    • D3 Alphanumeric Combinations of Address Ranges
    • D4 Fractional Addresses
    • D5 Spanish and Other Foreign Words
  • Appendix E
    • E1 Format
      • E11 Determining Address Ranges
      • E12 Alphanumeric Ranges
      • E13 Fractional Addresses
  • Appendix F
  • Appendix G
  • Appendix H
  • Appendix I
    • I1 General
      • I11 Complete Address
      • I12 Standardized Address
    • I2 Address Formats
      • I21 Residential Addresses
      • I22 Apartment Buildings and Condominiums
      • I3 Descriptive Spanish Words
    • I4 Directionals
    • I5 Delivery Address Line
      • I51 Components
  • Appendix J
    • J1 Address Formats
    • J2 Physical Addresses
    • J3 Post Office Box Addresses

Publication 28 - Postal Addressing Standards > 2 Postal Addressing Standards > 21 General > 213 Secondary Address Unit Designators

Link to "212 Format" Link to contents for "2 Postal Addressing Standards" Link to Index Link to "214 Attention Line"

213 Secondary Address Unit Designators

Unit designators are printed on delivery address line.Secondary address unit designators, such as APARTMENT or SUITE, are required to be printed on the mailpiece for address locations containing secondary unit designators. The preferred location is at the end of the Delivery Address Line. The pound sign (#) should not be used as a secondary unit designator if the correct designation, such as APT or STE, is known or is shown in the ZIP+4 file.

213.1 Common Designators

The most common unit designators are:

APARTMENT

APT

BUILDING

BLDG

FLOOR

FL

SUITE

STE

UNIT

UNIT

ROOM

RM

DEPARTMENT

DEPT

Note: See Appendix C2 for approved designators.

213.2 Pound Sign (#)

Pound sign preceding an apartment number.If the pound sign (#) is used, there must be a space between the pound sign and the secondary number.

Note: Use of the pound sign might be prohibited when using a Commercial Mail Receiving Agency (CMRA) address with Private Mail Box (PMB) information.

213.3 Alternate Location

Unit designator above the delivery address line.If all Delivery Address Line information cannot be continued in the Delivery Address Line above the city, state, and ZIP Code, place secondary address information on the line immediately above the Delivery Address Line.

Link to "212 Format" Link to contents for "2 Postal Addressing Standards" Link to Index Link to "214 Attention Line"

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