Some roles genuinely live at a desk. Controllers, IT managers, plant schedulers and inside sales leaders are often more reachable on a direct line than on a personal mobile.

In larger organisations, a direct dial also signals seniority correctly. Reaching the desk is reaching the role, even if a colleague picks up.

For owner-operated businesses the reverse is true. The mobile is the business line and the desk phone may not exist at all.

The most common way a list is padded is by taking a company main line and appending an extension. It passes a format check and fails a call.

Any dialler that cannot send post-dial tones simply lands on the main menu, and even when it can, the extension is frequently out of date.

Records structured that way are rejected here rather than counted, which is why a batch sometimes returns fewer contacts than a raw database search would suggest.

Association evidence matters: the number should tie to the individual through profile data or a matched employer domain, not merely to the company record.

Uniqueness matters too. A number appearing on several contacts at the same employer is treated as shared and discarded.

Line type is checked. Toll free prefixes and known queue ranges never pass.

The practical target is total reachability, not one number type. Every delivered contact carries a mobile or a confirmed direct dial, and each batch shows the split.

Reps can then sequence sensibly, calling desk numbers in working hours and mobiles slightly outside them.

Track connect rate separately for each type. It tells you which segments to weight next month.