The question was:
How would i route an entire block of DID number example - 801234*
to a specific IVR without affecting the normal block 801924xxxx?
You can use a pattern in the "Extension" setting of the trunk like this:
!801234(....)!5000! !801924(....)!\1!t!5000
This would first try to match the 801234xxxx and if it does match send it to the account 5000. If there is no match, it will try to match the 801924xxxx and send it to the xxxx extension - if that does not exist to 5000.