{
  "name": "OnTrac",
  "courier_code": "ontrac",
  "tracking_numbers": [
    {
      "name": "OnTrac",
      "regex": "\\s*C\\s*(?<SerialNumber>([0-9]\\s*){13})(?<CheckDigit>[0-9]\\s*)",
      "validation": {
        "checksum": {
          "name": "mod10",
          "evens_multiplier": 1,
          "odds_multiplier": 2
        },
        "serial_number_format": {
          "prepend_if": {
            "matches_regex": "^(?!4).+$",
            "content": "4"
          }
        }
      },
      "tracking_url": "http://www.ontrac.com/trackingres.asp?tracking_number=%s",
      "test_numbers": {
        "valid": [
          "C11031500001879",
          " C 1 1 0 3 1 5 0 0 0 0 1 8 7 9 ",
          "C10999911320231"
        ],
        "invalid": [
          "C10000000000000",
          "C11031500001889"
        ]
      }
    }
  ]
}