USA callsign 'memory map' Part of A, all of W & K & N are assigned to the USA by the ITU. The USA has in turn broken down what services can use which letters and in what combinations. Here is the the US assignments for each service. From To Service ----- ----- -------- AA0A AI9Z Amateur AA0AA AL9ZZ Amateur AA0AAA AL9WZZ Amateur AA0YAA AL9ZZZ Amateur AAA AEZ Department of the Army AFA AKZ Department of the Air Force ALA ALZ Department of the Army K0001 K9999 Personal radio in trust territories K02AA K83ZZ Television broadcast translator K0AA K9WZ Amateur K0AAA K9ZZZ Amateur K0Y K9Z Amateur K0YA K9ZZ Amateur KA0A KZ9Z Amateur KA0AA KZ9ZZ Amateur KA0AAA KZ9WZZ Amateur KA0YAA KZ9ZZZ Amateur KA2000 KZ9999 Land Mobile (Telephone); Marine Utility; Shipyard Mobile KA2XAA KZ9XZZ Experimental (Letter "X" follows the digit) KAA KZZ Coast (Class I) except Alaska; Broadcasting (Standard) KAA00000 KZZ99999 Personal radio, temporary permit KAA0001 KZZ9999 Personal radio KAA2 KZZ9 Aeronautical KAA20 KZZ99 Coast (Class I) telephone in Alaska; Fixed KAA200 KZZ999 Coast (Cls 2 & 3) & maritime rdo; Land Mob; Marine Rcv Test KAAA KZZZ Broadcasting (Std, FM, TV); Ship Telephone and/or Telegraph KAAA-BT KZZZ-BT Cable-repair ship marker buoy KAAA-FM KZZZ-FM Broadcasting with suffix "FM" KAAA-TV KZZZ-TV Broadcasting with suffix "TV" KAAA0001 KZZZ9999 Personal radio KAAA2 KZZZ9 Disaster station, except US Govmt; Land Mobile (Mob Telgph) KAAA20 KZZZ99 Ship survival craft KAAAA KZZZZ Aircraft Telegraph and/or Telephone KAAAA2 KZZZZ9 Aircraft survival craft N0AA N9ZZ Amateur N0AAA N9ZZZ Amateur NA0A NZ9Z Amateur NA0AA NZ9ZZ Amateur NA0AAA NZ9WZZ Amateur NA0YAA NZ9ZZZ Amateur NAA NZZ Department of the Navy; US Coast Guard W02AA W83ZZ Television broadcast translator W0AA W9ZZ Amateur W0AAA W9ZZZ Amateur WA0A WZ9Z Amateur WA0AA WZ9ZZ Amateur WA0AAA WZ9WZZ Amateur (example: WA2ISE :-) WA0YAA WZ9ZZZ Amateur WA2000 WZ9999 Land mobile (telephone); Ship Radar and/or Telephone WA2XAA WZ9XZZ Experimental (Letter "X" follows the digit) WAA WWU Coast (Class I) except Alaska; Broadcasting (Standard) WWW WZZ Coast (Class I) except Alaska; Broadcasting (Standard) WAA0000 WZZ9999 Ship radar and/or Telephone WAA0001 WPZ9999 Personal radio WAA2 WZZ9 Aeronautical WAA20 WZZ99 Coast telephone in Alaska; Fixed WAA200 WZZ999 Coast (Cl 2&3) & Martim Rdo; Lnd Mob; Marine Rcv Tst; Fixed WAAA WWUZ Broadcasting (Std, FM, TV); Ship Telephone and/or Telegraph WWVA WWVA Broadcasting (Std, FM, TV); Ship Telephone and/or Telegraph WWVJ WWVK Broadcasting (Std, FM, TV); Ship Telephone and/or Telegraph WWVM WWVR Broadcasting (Std, FM, TV); Ship Telephone and/or Telegraph WWVT WWVZ Broadcasting (Std, FM, TV); Ship Telephone and/or Telegraph WAWA WZZZ Broadcasting (Std, FM, TV); Ship Telephone and/or Telegraph WAAA-BT KZZZ-BT Cable-repair ship marker buoy WAAA-FM WZZZ-FM Broadcasting with suffix "FM" WAAA-TV WZZZ-TV Broadcasting with suffix "TV" WAAA2 WZZZ9 Disaster station, except US Govmt; Land Mobile (Telegrph) WAAA20 WZZZ99 Ship survival craft WAAAA WZZZZ Aircraft Telegraph and/or Telephone WAAAA2 WZZZZ9 Aircraft survival craft WT2200000WT9999999 Business radio, Gen Mob Rdo Svc, & Part 90 Temp. Permits WWV WWV Std Freq; Broadcasting (Std, FM, TV); Ship Tele ph a/o grph WWVB WWVI Std Freq; Broadcasting (Std, FM, TV); Ship Tele ph a/o grph WWVL WWVL Std Freq; Broadcasting (Std, FM, TV); Ship Tele ph a/o grph WWVS WWVS Std Freq; Broadcasting (Std, FM, TV); Ship Tele ph a/o grph WZZ200 WZZ999 Coast telephone in Alaska Harold G. Peach, Jr., N4FLZ