Thank you for the formula. Unfortunately, its only gets me halfway there.

Since MACs are always 12 characters in length and use 0 - 9 and A - F, I am getting problems from the jump from 9 to A.

See example:

Address 1 Address 2 Increment correct?
CC3540C4D082 CC3540C4D083 Yes
C427954B5919 C427954B591A No
001DD1385E92 001DD1385E93 Yes
001DD23977F2 001DD23977F3 Yes
001DD243D122 001DD243D123 Yes
001DD45E7F62 001DD45E7F63 Yes
001DD420E702 001DD420E703 Yes
001DD5070FC2 001DD5070FC3 Yes
CCA462013C72 CCA462013C73 Yes

Thanks.