Hi Robin,
as number ranges are created per Company code (SPRO -> ... TRM -> Transaction Manager -> Securities -> Transaction Management -> Transaction Types -> Number Ranges -> Define Number Ranges for Transaction) and then assigned to Transaction types in the case of Securities (SPRO -> ... TRM -> Transaction Manager -> Securities -> Transaction Management -> Transaction Types -> Define Transaction Types), then in principle you are able to create the above mentioned number ranges, like number range no X from 31102000001 to 31102999999 for the Company code 1102.
though I would not call this as a dynamic setup, as you need to maintain this structure yourself. E.g. if you have to introduce a new Company code, then it requires updating the respective parameters.
also, considering number ranges, make sure that provided number range is sufficient for the expected number of transactions.
Kind regards,
Renatas