This song's telephone number is/was one of the questions on the city's tour guide examination. For some reason, the song is not mentioned at all (as far as I can see) in Nancy Groce's New York: Songs of the City (1999).
Copyright restrictions prevent reproducing the full lyrics here, but they do appear on other web sites. See the following:
(GOOGLE)
New York Daily News - Big Town - Big Town Songbook: Same old stand... The exchange and its famous digits had been assigned to the Hotel Pennsylvania when it opened in ... a one and a two-one-two in front of the P (7) E (3) 6-5000. ...
www.nydailynews.com/city_life/big_town/ v-bigtown_archive/story/198876p-171725c.html - 39k -