Question : Porting or Transfer of Public IP Block when changing ISP

Hi,

We currently have a block of 16 addresses (WW.XX.YY.ZZ/28) provided by our ISP. We have used the majority of these for Data services, Site-to-site VPN's, Mail servers, Applications etc

We may have to move ISP in the near future and I'm concerned about having to migrate everything over to a new range of IP's

Our ISP owns the full /16 subnet as far as I know (WW.XX.YY.ZZ/16). Is it possible to port over your IP range to your new ISP when you move, keeping the same IP block?

Or is this impossible if the ISP uses subnetting/supernetting?

Answer : Porting or Transfer of Public IP Block when changing ISP

The ISP OWNS the IP range, probably in the 1000's of address. It would not be practicle to transfer small blocks between ISP's at every users request or routing would become near impossible on the internet.