Is it possible to submit a DDI pattern for the database, rather than just a single number?

I'm an administrator for an organisation that uses 0845 numbers in order to be able to reroute calls between offices (ie there are multiple geo numbers for each 0845, with the geos terminated in different places).  If we could use a normal geo-priced non-geo number for these, then we would.

There's no way I'm going to type in all the four or five thousand numbers, especially as they fall into various regular patterns.  Can I just put the patterns into the database?