The 555-1212.com Area Code database contains:

• area codes
• the cities associated with each area code
• an effective date for the area code, if the code is not yet effective
• an expiration date for the area code in one or more cities, if applicable

The database includes all area codes that are in active use or that have an announced future effective date. Note that effective dates and expiration dates may be revised several times before they actually arrive, and that plans for new area codes may be suspended or deferred.