A mobile reaches the person wherever they are. A desk phone reaches a desk, and a growing share of B2B buyers are not sitting at one.

Connect rates tell the story. Mobile-heavy lists commonly run five to twelve percent connect, while company-line lists struggle to pass two.

That difference compounds. At the same dial volume, a mobile list can produce three to four times the conversations, which is the only number that turns into pipeline.

Mobile numbers come from a mix of self-reported professional profiles, opt-in sources, partner networks and validation against carrier-adjacent signals. No single source covers a market.

That is why coverage varies. Senior operators at small companies are often easiest, because the owner's mobile is effectively the business number. Middle management at large enterprises is hardest.

Validation matters more than volume. A number is only useful when there is evidence tying it to the person, not just to the company.

Sort any sample by phone number. Repeated values across different people at the same company mean you are looking at a switchboard.

Check for extensions appended to a main line. These are sold as direct dials constantly and connect to a menu.

Check the prefix. Toll free numbers are never personal lines.

North America and the United Kingdom produce the highest mobile share on business contacts, which is why most outbound teams start there.

Across continental Europe the mix shifts toward direct dials, and consent rules are stricter, so plan for a smaller usable pool at the same targeting.

Asia Pacific varies enormously by country. Australia behaves close to the UK, while several other markets are direct-dial dominant.