A method and system are provided for migrating telephone service. An order is received to migrate telephone service to a competitive local exchange carrier for at least one telephone line assigned to a customer. An account is created for the order. At least one sub-account associated with the account may be created. Each sub-account may be associated with a different combination of a local exchange carrier, from which the telephone service is being migrated, and a billing telephone number. A first telephone migration order may be generated and sent for migrating at least one telephone line associated with a first combination of a local exchange carrier and a billing telephone number.