Area code 231

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1	I UNITED STATES DEPARTMENT OF THE INTERIOR U. S. - MEXICO BORDER FIELD COORDINATING C O M M l l l E E UNITED STATES-MEXICO BORDER AREA, AS DELINEATED Add to Reading List Source URL: 137.227.231.90 Language: English - Date: 2006-08-24 19:44:46 Mexico–United States border Rio Grande Hydrology Mexican Plateau Southwestern United States Hydrological code Drainage basin Rio Conchos Amistad Reservoir Geography of the United States Geography of Texas Water
2	DEPARTMENTAL DIRECTORY The prefix for all campus telephones is 231 (area code[removed]To place a call to another campus telephone, dial the last 5 digits of the number. For example, to place a callto 231-XXXX, dial 1-XXXX Add to Reading List Source URL: www.ndsu.edu Language: English - Date: 2014-02-06 16:10:22 North Central Association of Colleges and Schools North Dakota State University Fax North Dakota Technology Association of Public and Land-Grant Universities
3	PDF Document Add to Reading List Source URL: www.nationalnanpa.com Language: English - Date: 2009-08-21 14:58:59 Northern Michigan Grand Rapids – Wyoming metropolitan area Muskegon Michigan Area code 231 North American Numbering Plan Grand Rapids Michigan Michigan locations by per capita income Grand Rapids metropolitan area Geography of Michigan Michigan Western Michigan