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) 6101. The liner notes for the album by Brad McCuen described the song as follows: "Glenn and his close friend Chummy MacGregor, the band's pianist, collaborated on this quality pop song. It is a mystery why Glenn did not include this song among the hundreds he later recorded. Ray Eberle has the vocal." The version included was the April 18, 1939 performance at the Meadowbrook. There were five broadcast performances of “Sometime” by Glenn Miller and his Orchestra in 1939. It is Score 117 in the library and the composer credits are listed as Glenn Miller and John Chalmers MacGregor.