Routing Number | Bank Name | Bank Address | Phone Number | Change Date |
| |
| | | |
| 071922887 | OLD 2ND NATL BK AURORA | 37 SOUTH RIVER ST, AURORA, IL 60507-0000 | (630) 892-0202 | 2010-03-12 |
| 051409414 | OLD DOMINION NATIONAL BANK | PO BOX 299, NORTH GARDEN, VA 22959-0000 | (434) 293-5201 | 2008-07-18 |
| 251481766 | OLD DOMINION UNIVERSITY CU | 2701 HAMPTON BLVD, NORFOLK, VA 23517-0000 | (757) 533-9309 | 1996-12-06 |
| 081915075 | OLD EXCHANGE NATL BANK | 110 E. WALNUT ST, OKAWVILLE, IL 62271-0000 | (618) 243-5234 | 2002-05-10 |
| 067014437 | OLD FLORIDA BANK | P.O. BOX 61279, FORT MYERS, FL 33906-1279 | (239) 561-6222 | 2004-05-06 |
| 063111169 | OLD FLORIDA NATIONAL BANK | 502 N. HWY 17-92, LONGWOOD, FL 32750-0000 | (407) 831-1776 | 2009-05-01 |
| 041212637 | OLD FORT BANKING COMPANY | 8034 MAIN STREET, OLD FORT, OH 44861-0088 | (419) 992-4227 | 2007-03-19 |
| 063115437 | OLD HARBOR BANK | SUITE 230, CLEARWATER, FL 33759-0000 | (727) 451-2275 | 2008-05-05 |
| 264181448 | OLD HICKORY CREDIT UNION | P.O. BOX 431, OLD HICKORY, TN 37138-0000 | (615) 847-4043 | 2007-04-27 |
| 055002406 | OLD LINE BANK | 1525 POINTER RIDGE DR, BOWIE, MD 20716-0000 | (301) 430-2500 | 2008-09-25 |