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==1880First Pensacola Telephone Exchange==Pensacola's first telephone exchange was established by [[Southern Bell]] on the northeast corner of [[Government Street]] and [[Palafox]] (now the site of [[Seville Tower]]). It went operational on [[September 1]], [[1880]], serving 31 telephones. (This was a A considerable development for the area, as the first commercial telephone exchange had only been established about two years earlier, the Pensacola exchange was the first in Florida to have exclusive operating rights in its municipality.) Unfortunately it was destroyed in the [[fire of 1880]] only a few months later. A historical marker was placed on the street corner by the Pensacola Council of the Telephone Pioneers of America on [[January 17]], [[1964]].<ref>http://www.waymarking.com/waymarks/WM2314</ref> ==Hemlock Central Office==[[Image:HemlockCentralOffice.jpg|thumb|right]]{{main|Southern Bell Building}}The five-story [[Southern Bell Building]] at 30 West [[Belmont Street]] was erected in [[1931]]. It was home to the '''Hemlock Central Office''', "HEmlock" being the alphabetical code for "43" numbers. The building was expanded in [[1946]], [[1950]] and [[1951]].