Mobile vs landline
The distinction between a mobile number (tied to a person) and a landline (often a shared switchboard).
A mobile number reaches a person directly; a landline often ends at a switchboard or a shared desk. For phone prospecting, mobile is far more valuable because it bypasses gatekeepers and reaches the decision-maker.
In France, the numbering plan deterministically distinguishes a mobile (06/07) from a landline. Quality enrichment does not deliver a switchboard number dressed up as a personal one.
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