Metropolitan area codes: 1968-1972

00001
New York, NY
00002
Los Angeles - Long Beach, CA
00003
Chicago, IL
00004
Philadelphia, PA
00005
Detroit, MI
00006
San Fransisco - Oakland, CA
00007
Boston, MA
00008
Pittsburg, PA
00009
St. Louis, MO
00010
Washington, D.C.-MD-VA
00011
Cleveland, OH
00012
Baltimore, MD
00013
Newark, NJ
00014
Minneapolis-St. Paul, MN
00015
Buffalo, NY
00016
Houston, TX
00017
Milwaukee, WI
00018
Patterson-Clifton-Passaic, NJ
00019
Dallas, TX

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