ERC
An NPA whose last two digits are identical (800, 888, 877, 866, 855, 844, 833, 900...), reserved for special services such as toll-free and premium-rate rather than geographic assignment.
An NPA whose last two digits are identical (800, 888, 877, 866, 855, 844, 833, 900...), reserved for special services such as toll-free and premium-rate rather than geographic assignment.