"900 number" meaning in English

{
  "etymology_text": "In the original North American Numbering Plan, phone numbers beginning with an area code of \"800\" were reserved for so called toll-free numbers, where the party receiving the call pays the charges. The telephone companies later developed a corresponding set of numbers beginning with the area code \"900\" which would permit the owner of the number to receive additional fees from the caller.",
  "forms": [
    {
      "form": "900 numbers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "900 number (plural 900 numbers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "American English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Canadian English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms with non-redundant non-automated sortkeys",
          "parents": [
            "Terms with non-redundant non-automated sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Telephony",
          "orig": "en:Telephony",
          "parents": [
            "Electronics",
            "Telecommunications",
            "Technology",
            "Communication",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A telephone number for which an extra charge is assessed, part of which is returned to the owner of the number."
      ],
      "id": "en-900_number-en-noun-EKpcfDVh",
      "links": [
        [
          "Canada",
          "Canada"
        ],
        [
          "US",
          "American English"
        ],
        [
          "telephone number",
          "telephone number"
        ]
      ],
      "raw_glosses": [
        "(Canada, US) A telephone number for which an extra charge is assessed, part of which is returned to the owner of the number."
      ],
      "related": [
        {
          "word": "1-900"
        },
        {
          "word": "800 number"
        },
        {
          "word": "premium-rate telephone number"
        }
      ],
      "tags": [
        "Canada",
        "US"
      ],
      "wikipedia": [
        "900 number"
      ]
    }
  ],
  "word": "900 number"
}

{
  "etymology_text": "In the original North American Numbering Plan, phone numbers beginning with an area code of \"800\" were reserved for so called toll-free numbers, where the party receiving the call pays the charges. The telephone companies later developed a corresponding set of numbers beginning with the area code \"900\" which would permit the owner of the number to receive additional fees from the caller.",
  "forms": [
    {
      "form": "900 numbers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "900 number (plural 900 numbers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "1-900"
    },
    {
      "word": "800 number"
    },
    {
      "word": "premium-rate telephone number"
    }
  ],
  "senses": [
    {
      "categories": [
        "American English",
        "Canadian English",
        "English countable nouns",
        "English entries with incorrect language header",
        "English entries with topic categories using raw markup",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms spelled with numbers",
        "English terms with non-redundant non-automated sortkeys",
        "en:Telephony"
      ],
      "glosses": [
        "A telephone number for which an extra charge is assessed, part of which is returned to the owner of the number."
      ],
      "links": [
        [
          "Canada",
          "Canada"
        ],
        [
          "US",
          "American English"
        ],
        [
          "telephone number",
          "telephone number"
        ]
      ],
      "raw_glosses": [
        "(Canada, US) A telephone number for which an extra charge is assessed, part of which is returned to the owner of the number."
      ],
      "tags": [
        "Canada",
        "US"
      ],
      "wikipedia": [
        "900 number"
      ]
    }
  ],
  "word": "900 number"
}