The number "505" can refer to various things, including a numerical value, an area code, or a model number. In the context of area codes, 505 is the telephone area code for the state of New Mexico in the United States. It covers cities like Albuquerque and Santa Fe. In popular culture, "505" is also known as a song by the band Arctic Monkeys. Featured on their album "Favourite Worst Nightmare," the song explores themes of longing and nostalgia. The number has various meanings depending on the context in which it is used.