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  2. List of Washington (state) area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Washington_(state...

    Seattle, Shoreline, Lake Forest Park, Mercer Island, Bainbridge Island, Vashon Island: Original statewide area code until 1957, when area code 509 was created for Eastern Washington. Further splits in 1995 to create area code 360 for most of Western Washington, and 1997 to form area codes 253 and 425. 564 will be added to the 206 area in 2025. 509

  3. List of postal codes - Wikipedia

    en.wikipedia.org/wiki/List_of_postal_codes

    An individual delivery point may be represented as an 11-digit number, but these are usually represented by Intelligent Mail barcode or formerly POSTNET bar code. The first digit is assigned regionally (for example, ZIP codes beginning with 9 are found in the western coastal states, Alaska, Hawaii, and islands in the Pacific), and ZIP codes ...

  4. Postal address verification - Wikipedia

    en.wikipedia.org/wiki/Postal_address_verification

    If the address is valid, it is assigned a ZIP+4 code something like this: 12344-5678, where the first five digits are the ZIP code and the trailing four digits are the delivery range. An address with a ZIP+4 code (or nine-digit ZIP code) is considered to be valid. In most cases, this means that the address is deliverable.

  5. This Is What Your ZIP Code Actually Means - AOL

    www.aol.com/zip-code-actually-means-235400396.html

    Postal Code Meaning: How to Decipher the 5-Digit Number. The meaning behind postal codes is actually more intricate than you might assume. While some ZIP codes have taken on a life of their own in ...

  6. ZIP Code - Wikipedia

    en.wikipedia.org/wiki/ZIP_Code

    By the early 1960s, a more organized system was needed, and non-mandatory five-digit ZIP Codes were introduced nationwide on July 1, 1963. [4] [5] The USPOD issued its Publication 59: Abbreviations for Use with ZIP Code on October 1, 1963, with the list of two-letter state abbreviations which are generally written with both letters capitalized ...

  7. Area code 206 - Wikipedia

    en.wikipedia.org/wiki/Area_code_206

    Area code 206 is a telephone area code in the North American Numbering Plan (NANP) for the U.S. state of Washington. The numbering plan area (NPA) includes Seattle and most of its innermost suburbs. This includes such suburbs as Shoreline and Lake Forest Park ; Mercer , Bainbridge , and Vashon Islands; and portions of metropolitan Seattle from ...

  8. Sectional center facility - Wikipedia

    en.wikipedia.org/wiki/Sectional_center_facility

    L002 3-Digit ZIP Code Prefix Matrix, Effective Date 2017-04-01, from USPS Facility Access and Shipment Tracking (FAST) L005 3-Digit ZIP Code Prefix Groups—SCF Sortation, Effective Date 2017-04-01, from USPS Facilities Access and Shipment Tracking (FAST) G030 Postal Zones; G042 Pricing and Classification Service Center

  9. Area code 425 - Wikipedia

    en.wikipedia.org/wiki/Area_code_425

    Map of Washington's area codes. The red-highlighted area has area code 425. Area code 425 is a telephone area code in the North American Numbering Plan (NANP) for the suburbs north and east of Seattle in the U.S. state of Washington. The numbering plan area includes the Eastside, extending east to North Bend, north to Everett, and south to ...