The short answer
Metadata can classify ranges as mobile, fixed line or other types where documentation allows; uncertainty should remain visible.
Read the numbering plan
Ranges can have different service designations, including mobile, fixed, toll-free and VoIP where the metadata distinguishes them.
Mind mixed ranges
Some countries use overlapping or combined fixed/mobile ranges, so a single precise type may not be possible.
Avoid a personal inference
Type does not reveal who answers, whether a device is online or whether a call will connect.
Range type and physical device are different
Type metadata describes a numbering range. It is not an inspection of the handset or application currently handling calls.
| Metadata label | What it describes | What it cannot establish |
|---|---|---|
| Mobile | A range classified as mobile | A particular smartphone or its location |
| Fixed line | A fixed-line allocation | That a person is at the assigned area |
| Fixed line or mobile | An ambiguous range classification | Which one applies to this subscriber |
| VoIP | A range classified as VoIP where supported | The user’s app, address or online status |
Keep an ambiguous classification visible. Do not convert “fixed line or mobile” into “mobile” merely to make a result appear more complete.