To format a MAC address string without delimiters to a MAC address separated by a colon (:) or hyphen (-), you can use a formula based on the TEXTJOIN, MID, and SEQUENCE functions. In the example shown, the formula in D5, copied down, is:
The formula returns the formatted strings as seen in column D.
A MAC (Media Access Control) address is a unique identifier assigned to most network adapters. Two common IEEE 802 standards display a MAC address in 6 groups of 2 hexadecimal digits separated by a colon (:) or hyphen (-) like this:
To format a text string with 12 characters in the same way, you can use a formula like this:
The Excel MID function extracts a given number of characters from the middle of a supplied text string. For example, =MID("apple",2,3) returns "ppl".
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