curl --request GET \
  --url https://api.withallo.com/v1/api/numbers \
  --header 'Authorization: <api-key>'

{
  "data": [
    {
      "number": "+1234567890",
      "name": "Main Line",
      "country": "US",
      "is_shared_number": false
    },
    {
      "number": "+33612345678",
      "name": "France Office",
      "country": "FR",
      "is_shared_number": true
    }
  ]
}