Nasb routing number. Find Your Routing Number. A Bank routing number, also known as an ABA number, is a nine-digit code that identifies a bank in the U.S. The number helps other ...Banking phone numbers ... NASB will deliver the right financial solution with individualized service. ... Routing number: 301071631.301071631. Status · Valid Routing Number Headquarters · Grandview, Missouri Telegraphic Name · NORTH AMER SVGS Routes Fed Bank · 101000048. Checking Digits · FormatThe 073921530 ABA Check Routing Num