{
  "number": 503,
  "title": "Socket number list",
  "authors": [
    "N. Neigus",
    "J. Postel"
  ],
  "published": "1973-04",
  "status": "Unknown",
  "stream": "Legacy",
  "pages": 8,
  "formats": [
    "TXT",
    "HTML"
  ],
  "doi": "10.17487/RFC503",
  "obsoletes": [
    "RFC433"
  ],
  "obsoleted_by": [
    "RFC739"
  ],
  "urls": {
    "html": "https://rfc.dk/rfc503/",
    "text": "https://rfc.dk/rfc503.txt",
    "rfc_editor": "https://www.rfc-editor.org/rfc/rfc503",
    "datatracker": "https://datatracker.ietf.org/doc/rfc503/"
  },
  "text_modified": "2001-06-11T21:41:00Z"
}