As a result , prefixes were duplicated in both area codes , which counteracted much of the benefit of the splitting , with only 200 of 700 prefixes in area 612 moving entirely to area 651 .
More than 40 exchanges had territory that straddled the new boundary .
Prefixes were duplicated in both area codes , which counteracted much of the benefit of the splitting , with only 200 of 700 prefixes in area 612 moving entirely to area 651 .
More than 40 exchanges had territory that straddled the new boundary .