The region directly bordered 612 (located to the north) until that area code was divided up in the 1990s. The western half of 507 bordered area code 320 starting in 1996, and then later came to border area code 651 (1998) and area code 952 (2000). The northern border of 507 was modified slightly so that growing communities in and near the Twin Cities would be more closely linked with that region by telephone. 612 has now shrunken down to just include Minneapolis and a few surrounding suburbs, and no longer borders 507.
