Recognize the warning signs before they cripple your sales efforts. Key indicators include: 1) Consistently high numbers of disconnected tones or "number not in service" messages, 2) Low answer rates and frequent hang-ups, 3) Recipients consistently stating they are the wrong person, 4) A surge in complaints or requests to be placed on a Do-Not-Call list, and 5) plummeting agent moral... https://www.b2clead.org/phone-number-list/