D memory is 32 bits, as are IP V4 addresses. Each byte of the D location contains one digit of the IP address. There are several ways to do this, but the easiest to explain is probably to use casting. If you are using D0, the cast to access each byte is D0:B0, D0:B1, D0:B2, D0:B3. I used the INI instruction to plug the individual bytes of D0, and then displayed it as an IP address in the data view.