Here is a list of few frequency bands for Telecom engineers and Communication engineers....

AM radio – 535 kilohertz to 1.7megahertz

Short wave radio – bands from 5.9 megahertz to 26.1 megahertz

Citizens band (CB) radio – 26.96 megahertz to 27.41 megahertz

Television stations – 54 to 88 megahertz for channels 2 through 6

FM radio – 88 megahertz to 108 megahertz

Television stations – 174 to 220 megahertz for channels 7 through 13

GSM (Cell phone) -- 800/900 MHz and 1800/1900 MHz