Crossword clues for the word: OFFICEEXTENSION The word OFFICEEXTENSION has appeared as an answer to at least 3 crossword clues on different crossword puzzles. Crossword clues for OFFICEEXTENSION Showing 1 to 3 of 3 results Clue(s) Info on a business card Part of a business phone number Part of a business phone number (... first 3 letters last 2)