iMessage/Apple-id with two phone numbers possible?

Hi all

I'm the happy owner of two iPhones, one for work (iP6 - iOS 8.2) and one private (iP4S - iOS 7.1.2).

I was wondering if it is possible to have both of my phone numbers associated with the same Apple-id, so both iPhones get iMessages sent to either number?

So far I can only get one number to register, which of course works for iMessage on both devices...

Hope you guys can help me! :-)

/Phil