To be able to port around an IP address, you need to be able to change the Autonomous System (AS) which advertises it. The minimum IPv4 range which can be adver

To be able to port around an IP address, you need to be able to change the Autonomous System (AS) which advertises it. The minimum IPv4 range which can be advertised is a /24 (256 IPs), so you will need one of those for full portability. You can purchase a /24 IP range from a broker [1]. It used to be possible to get a "free" /24 from RIPE, but the waiting list is very long these days [2]. RIPE also run a listing service, but it is unwieldy and you would need to manage the escrow yourself, which might be a bit risky given that you'll be paying ~13k Euros for the block. To complete the purchase you either need to be a RIPE Local Internet Registry (LIR) yourself [3], or you need to find a local LIR [4] to sponsor your resource. (They will likely charge you a fee for this, but it will cost less than becoming an LIR.) To use the IP block, you can get your own AS Number from RIPE (again via your own LIR or a sponsoring LIR) and advertise it from your own router via a provider who speaks BGP [5] or by plugging in to an Internet Exchange Point (IXP). This probably also means co-locating your equipment in a datacenter where peers are already present. Alternatively, you can find a provider who will let you advertise your IP block from their AS. There are several providers who will do this including the large players like AWS [6] and smaller operations like Vultr [7]. If you started off by using your IP range with someone else's AS, there should be no reason you couldn't move it to your own AS later. [1] https://auctions.ipv4.global/ https://auctions.ipv4.global/ (there are others, I have personally used this one) [2] https://www.ripe.net/manage-ips-and-asns/ipv4/ipv4-waiting-list https://www.ripe.net/manage-ips-and-asns/ipv4/ipv4-waiting-l... [3] https://www.ripe.net/participate/member-support/become-a-member https://www.ripe.net/participate/member-support/become-a-mem... [4] https://www.ripe.net/membership/indices/DE.html https://www.ripe.net/membership/indices/DE.html [5] e.g. Deutsche Telekon, Lumen, Telia, Cogent, Zayo, Hurricane Electric ... [6] https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-byoip.html https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-byoi... [7] https://www.vultr.com/features/bgp/ https://www.vultr.com/features/bgp/