SUM is aninterbank network in forty-twoU.S.states (all except Alaska, Alabama, Delaware, Montana, Nebraska, North Dakota, South Dakota, Wyoming), the District of Columbia and Puerto Rico.[1] It is largely made up of smaller local banks andcredit unions. Account holders at member institutions do not payATM usage fees for using ATMs of any other financial institution within the network.
SUM is a product ofNYCE Payments Network, LLC, anFIS company.[2]
