You know how you can populate cels in a series by dragging the lower right-hand corner of a cel downwards? And if you have a unique series, you can type in about 3-5 cels, select them and then drag down? Well, trying to do with this IP Addresses, but in the third octet, not the last one. So what I want is: 123.45.600.0, 123.45.601.0, 123.45.602.0, etc. Any ideas on how to do this (besides removing the last octet?) I messed a LITTLE with formulas, but math ones weren't doing me any good. Thanks!