every hour. Five coordinators (ARRL, W5YI Group Inc, Western Carolina Amateur Radio Society/VEC Inc, W4VEC Volunteer Examiners Club of America and the Laurel Amateur Radio Club Inc) are authorized to handle these call sign requests. Notes and references AC6V's History of Amateur Radio External links ARRL's U.S. License Privileges by Band charts. FCC Information on Amateur Radio Service Operator Licensing FCC Information on Volunteer Examiner Coordinators National Conference of Volunteer Examiner Coordinators (source of question pools) United States Amateur radio in the United States