What is rbc transit number? 053100850 routing number is a 9-digit number designed and assigned to Rbc Bank (usa) by The American Bankers Association (ABA) to identify the financial institution upon which a payment was drawn. Rbc Bank (usa) routing numbers are also known as as "ABA numbers", "routing transit numbers" (RTN), or "check routing numbers".What is rbc number? RBC Insurance is the largest Canadian bank-owned insurance organization, with services to over five million people. It provides life, health, travel, home and auto and reinsurance products as well as creditor and business insurance services.