GNB BANK Routing Number: 073921970
- Routing Number: 073921970
- Bank Name: GNB BANK
- Address: 529 G AVE
- State: IA
- Zip Code: 50638-0000
- Bank Phone: 319-824-5431
- Office Type: Main
- City: GRUNDY CENTER
- Institution Status Code: 1
GNB BANK Routing Number: 073905064
- Routing Number: 073905064
- Zip Code: 50638