Assigning IPs

[andrewm]

I've just got a new block of IP addresses for my server.

However, I have one left over from the last batch

e.g 111.222.333.100

The new IPs are:

111.222.444.555
111.222.444.556 etc

I want to assign nameservers to a new reseller, but it automatically assigns the oldest 1 first, so I have

ns1 = 111.222.333.100
ns2 = 111.222.444.556

How can I assign two consecutive IPs?

edit:I got round the problem by assigning the older IP address as ns3.mydomain.com

I'm sure there must be a better way though