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| Headquarters | US NRC One White Flint North 11555 Rockville Pike Rockville, Maryland 20852-2738 or Two White Flint North 11545 Rockville Pike Rockville, Maryland 20852-2738 | Switchboard: 301-415-7000 | |
| Region I | US NRC 475 Allendale Road King of Prussia, PA 19406-1415 | 7:30 a.m.-4:15 p.m. (EST)
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| Region II | US NRC Sam Nunn Atlanta Federal Center, 23 T85 61 Forsyth Street, SW Atlanta, GA 30303-8931 | 7:30 a.m.-4:15 p.m. (EST)
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|  | US NRC 801 Warrenville Road Lisle, IL 60532-4351 | 7:00 a.m.-4:45 p.m. (EST)
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|  | US NRC Harris Tower 611 Ryan Plaza Drive, Suite 400 Arlington, TX 76011-8064 | 7:30 a.m.-4:15 p.m. (EST)
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| (as of 06/01/2000) | |||
| Region I | Region II | Region III | Region IV | 
| * Connecticut * District of Columbia * Delaware Maine Maryland Massachusetts New Hampshire * New Jersey New York # Pennsylvania * Puerto Rico Rhode Island * Vermont | Alabama Florida Georgia Kentucky Mississippi North Carolina South Carolina Tennessee * Virginia * West Virginia | Illinois * Indiana Iowa * Michigan # Minnesota * Missouri Ohio # Wisconsin | * Alaska Arkansas Arizona California Colorado * Hawaii * Idaho Kansas Louisiana * Montana Nebraska Nevada New Mexico North Dakota # Oklahoma Oregon * South Dakota Texas Utah Washington * Wyoming | 
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