Crossword clues for No. with an ext. 3 letters:EXTBus. line abbr.EXTTelephone no.EXTNo. after a telephone no.EXTAbbr. after a telephone numberEXTBus. phone number addendumEXTOffice no.EXTNo. after a phone no.EXTBusiness phone no. add-onEXTBusiness card abbr.EXTAdd'l phoneEXTPhone no. followerEXTPhone no. add-onEXT3 after 10: Abbr.EXTPart of a business phone no.EXTBusiness no.EXTNumber that might help avoid being transferred a zillion times: Abbr.EXTAdd-on no.EXTBus. phone no., perhapsEXTOpposite of int.EXTAdded telephone line (abbr.)EXTNo. you may dial at any timeEXTNo. dialed in a phone menuEXTNo. in a business email footerEXTInternal phone no.EXTNos. punched during a phone tree callEXTNo. to enter when the company voicemail beginsEXTTel. number add-onEXTOutside (abbr.)EXTThree nos. in the officeEXTAddnl. phoneEXTTel. no. add-onEXTTel. no. adjunctEXTAddnl. ph.EXTNo. after a 10 digit numberEXTPhone no. dialed "at any time"EXTPhone msg. detailEXTIn-house #EXTNo. after a no.EXTNo. after a no. in an e-mail signatureEXTOuter: AbbrEXTNo. that you can dial at any time during a voice menuEXTAbbr. often found between two numbersEXTNumber on a line: Abbr.EXTCowboy's nicknameEXTNo. at a 27-DownEXTNo. in many "sig blocks"EXTNo. in a "sig block"EXTYou don't have to dial one when calling a cell phone: Abbr.EXTNo. after 10 nos.EXTNo. after a tel. no.