Find Direct-Dial Phone Numbers for 260 B2B Contacts — 12-Hour Turnaround

Job Description I have a spreadsheet of 260 B2B contacts that already includes: First name Last name Company / organization Email address I need an experienced B2B data researcher to find and append the best available direct BUSINESS phone number for each individual contact. IMPORTANT — NO SWITCHBOARDS & NO CELL PHONE NUMBERS I am specifically looking for business phone numbers that allow me to reach the individual contact directly. Acceptable numbers include: Direct office numbers Direct-dial business numbers Company phone numbers with the individual's specific extension Other verified business numbers specifically assigned to that individual Extensions are absolutely acceptable and should be included whenever available. DO NOT PROVIDE: Company main lines without an individual extension Switchboards Reception/front-desk numbers Generic office numbers Customer-service numbers Personal cell phone numbers Mobile phone numbers Personal/home phone numbers If the only number you can find is a company switchboard or a cell/mobile number, leave the field blank. Do not substitute it as a successful match. I will spot-check the completed list for accuracy. Deadline All 260 contacts must be completed within 12 hours of accepting the contract. Please only apply if you can begin immediately and meet that deadline. In Your Proposal Please tell me: What tools/data sources you use to find direct business numbers and extensions. Your expected match rate for these 260 contacts. Confirm that you understand company main lines without extensions do NOT count as matches. Confirm that you understand cell/mobile numbers are NOT wanted. Confirm that you can return the completed spreadsheet within 12 hours of contract acceptance. Accurate work can lead to additional lists and ongoing projects. 90% succes (240 enriched contacts) is the expectation. Comment NO SWITCHBOARD NUMBERS so i know you read the total post.