thanks
Sean...

"Bob Phillips" wrote:

=LEFT(A10,FIND("~",SUBSTITUTE(A10,".","~",3)))&20

--
HTH

Bob Phillips

(replace somewhere in email address with gmail if mailing direct)

"Sean" wrote in message
...
I know the default gateway of over 2000 routers. They are in a master
spreadsheet which has created a vlookup from another sheet within the same
workbook.
If the default gateway is
100.100.100.1
in a second column I want to produce a ip address of
100.100.100.20.
Once I have this I can copy the formular to make a third IP address of
100.100.100.25
I know that the last octet in the dafault gateway will always end in 1 and
I
know that the second IP address will always end in 20
How do I get the second address to calculate to to be always 20.
The first 3 octets, although follow a formular across the 2000 sites will
differ
If anyone can help it would be most grateful I don;t fancy having to do it
manually
Sean...