Phone number labels: Landline, Mobile, Switchboard and more

What the labels on a phone number say, and what they do not say.

ConceptChecked 2026-10-10

A phone number shows its type, so you know what you are about to ring. The type describes the line, not the person.

The labels

Label Meaning
Landline A fixed line.
Mobile A mobile number.
Landline or mobile The number could be either.
Internet phone A number that runs over the internet.
Freephone A free-to-call number.
Premium rate A number that costs the caller extra. Think before you ring.
Business line Shown beside a person's number on a person record.
This site's own line A number printed on the business's own website.

What you should know

  • Numbers show once you reveal the record. See What a reveal is.
  • A number belongs to a business unless the record says otherwise. Whether you may call it depends on PECR. See PECR and UK GDPR in plain words for a B2B seller.
  • Adapt does not check numbers on the TPS or CTPS lists. Do that yourself before a campaign of calls.