The oldest working phone number in New York

It just might be (212) 736-5000, otherwise known by its old-school moniker PA 6-5000.

It’s the main line for the Hotel Pennsylvania, the massive, worn and weary on Seventh Avenue and 33rd Street open since 1919.

The phone number dates back to at least 1930, when seven-digit numbers replaced five-digit and two-letter numbers.

And it’s immortalized in the Glenn Miller song of the same name.

Call the number, and a recording plays 10 seconds of the song before you’re connected to an operator.

The Hotel Pennsylvania may be reduced to a pile of bricks soon; reportedly it’s to be torn down and an office tower put up in its place.

Once the largest hotel in the world, this McKim, Mead & White building (they designed the original Penn Station) doesn’t seem to have many fans these days.