Acronyms, Abbreviations, and Initialisms.
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The meaning of the Acronym 503 is...

503 is

  • Out of Resources

More Meanings For 503:

  • Out of Resources
  • El Salvador
  • Oregon - Northwest and Portland tri-metro

503 is also in:

Acronym Definition Searched: ASTB 44454 HAWK DTE BR RCE M 11354 DBT CFR 68018 PMB HCI CM KIM