Telephone exchange names UK in 1966, although it was not until the early 1970s that all exchange names were converted. In Paris and its suburbs, the conversion from 3L-4N to all numbers occurred in October 1963. For example, ÉLYsées became 379, LOUvre 508, PIGalle 744, POMpadour 706... But until October 1985, when an 8th number was added, it remained possible to make use of almost all the previous combinations. At least four popular songs use old telephone exchanges in their names: "PEnnsylvania 6-5000" (PE 6-5000), recorded by Glenn Miller (the inspiration for that song, the Hotel Pennsylvania in New York City, still holds
Sometime (Glenn Miller song) introduced the song as follows: "Now comes a number that was originated right here in the band. Glenn and Mac the piano player got together and wrote it. Ray Eberle sings it. The title: 'Sometime'." This song is different from the Gus Kahn and Ted Fiorito song of the same name from 1925 and the 1918 Rudolf Friml and Rida Johnson Young song from their musical of the same name. The song was first released commercially by RCA Victor in 1963 on the album "Glenn Miller: On the Air, Volume 3", LSP 2769(e), and as a three record box set,