Old national bank routing numbers, a relic of banking history, are identifiers once used to facilitate financial transactions between institutions. An example of an old national bank routing number is 026000090, which was assigned to the First National Bank of Boston.
These routing numbers played a crucial role in the smooth functioning of the banking system, ensuring that funds were transferred accurately and efficiently. They provided a standardized method of identifying financial institutions and processing payments, making it possible for businesses and individuals to conduct transactions across different banks.