I have spent the last several days also trying to find how to do this. Re: How do I format cells for MAC Addresses - SOLVED! Thanks very much for your help, and apologies for the length of this post. So: What am I doing wrong? Is there something else I can try? I tried using 00-00-00-00-00-00, #-#-#-#-#-#, and ?-?-?-?-?-? as custom formats, and none of them work if there are alpha characters in the hex digits. Treating hex numbers as text would work fine in this case, except that there seems to be no way to do a custom format on a text value. Adding the analysis add-in made no difference. It did work for numbers written only in decimal numeric characters. (Hello? Microsoft?) Using HEX2DEC did not work for hex numbers with ABCDEF digits. It seems apparent that there is no way for the user to make Excel 'hexidecimal-aware'. 00-06-F8-E4-85-7B, without having to manually add the hyphens to each entry. 0006F8E4857B, and my engineers want to convert that to a correctly formatted MAC address, e.g. The MAC addresses come through as hex numbers with no format, e.g. My shop is trying to format MAC addresses from a text dump imported as a. Hello, everyone! I have the same question that JayHertz asked two years ago: How to format MAC addresses in Excel? I have searched Excel Help, the knowledge base, and the Internet without success so far.

Convert mac address to colon win8