Related Clues:

• Abbr. after a phone no.
• Request to an oper.
• Work phone no.
• Three-digit no., often
• Second ph.
• Bus. line
• No. after a tel. no.
• Tel. no. adjunct
• Business card abbr
• Contact info spec
• Part of a telephone no
• Business card no
• Letters on a business card
• Dept. phone no
• It often precedes a three-digit number