On January 1, 2013, the Federal Communications Commission (FCC) has mandated that all public safety and business industrial land mobile radio (LMR) systems operating in the 150-512 MHz radio bands must cease operating using 25 kHz efficiency technology and begin operating on channel bandwidths of 12.5 kHz or less, or that meet a specific efficiency standard, e.g., utilize two- or four-slot TDMA.

Click on the map on the right to find narrowbanding assistance in your state. NPSTC has assembled local, knowledgeable contacts from the State's Interoperability Coordinators, the Department of Homeland Security's (DHS) Office of Emergency Communications (OEC) Regional Coordinators, local public safety frequency advisors, and National Regional Planning Council (NRPC) members, plus additional persons who can provide you information on the narrowbanding process.