@openstreetmap/id-tagging-schema/data/fields/phone.json

The OpenStreetMap tagging model used by the iD editor

{
    "key": "phone",
    "keys": [
        "phone",
        "contact:phone"
    ],
    "type": "tel",
    "label": "Telephone",
    "placeholder": "+31 42 123 4567",
    "terms": [
        "phone number"
    ]
}