Routing number
Routing number means
(1) The number printed on the face of a check in fractional form on in nine-digit form;
(2) The number in a bank's indorsement in fractional or nine-digit form; or
(3) For purposes of subpart C and subpart D, the bank-identification number contained in an electronic check or electronic returned check.
Source
12 CFR § 229.2
Scoping language
As used in this part, and unless the context requires otherwise, the following terms have the meanings set forth in this section, and the terms not defined in this section have the meanings set forth in the Uniform Commercial Code: