Can I have more IPs?
Rules do vary between Services, as follows:
Service Plan with IPv4 NAT + IPv6 /80 » it is not technically possible to have more IPs or different IPs on an existing Service Plan. You'll always have to update the Plan to e.g. a Full IPv4 + IPv6 plan.
Service Plan with IPv4 NAT + IPv6 /64 » it may not be possible to provide additional IPv6 /64 IPs, depending on the upstream network providers: it is supported on C-Servers, Interserver and 23M, but it is not supported on Hetzner. For IPv4, additional IPs are not supported; you'll always have to update the Service Plan.
Service Plan with IPv4 NAT and without IPv6 » it is not possible to provide either extra IPv4s or extra IPv6s. In particular for the IPv6s on these Service Plans, these are not provided by the upstream, so we can't even provision IPv6 (a very rare case indeed, when that happens - and C-Servers does avoid these types of limitations).
Service Plan with Full IPv4 + IPv6 /80 » additional full IPv4s are possible, for an extra cost, depending on the upstream supplier (check this article); additional IPv6s will not be possible due to upstreamed limitations on IPv6 provisioning already forcing us to resort to provide a /80 block on IPv6.
Service Plan with Full IPv4 + Full IPv6 » both are always possible to provide extra.
IPv4
The extra IPv4 IPs are exclusively supported for plans with Full IPv4. This occurs due to technical bridging limitations on NAT plan arrangements, and in order to ensure the best performance. If you'd like to have a Full IPv4 and you have a plan with NAT IPv4, you'll need to upgrade your Service Plan.
The following cost applies depending on the supplier of the IP network ranges:
Hetzner Online GmbH - AS24940 - Zeta Series (Zeta.8, Zeta.9, etc), for Germany and Finland
Each /32 IPv4 (1 Additional Full IPv4): 2,59 USD per month + 9 USD setup fee
/29 and higher - not available
Centerfield Ltd - AS214566 - Alpha Series (Coming Soon)
Each /32 IPv4 (1 Additional Full IPv4): 2,59 USD per quarter (= 0,863 USD/month) + 3,50 USD setup fee
/29 IPv4 (8 IPv4s, 5 usable): 6,90 USD per month + 10 USD setup fee
/28 IPv4 (16 IPv4s, 14 usable): 13,90 USD per month + 19 USD setup fee
/27 IPv4 (32 IPv4s, 30 usable): 25,90 USD per month + 29 USD setup fee
/24 IPv4 (256 IPv4s, 254 usable): 199 USD per month + 290 USD setup fee*
* available only on MultiDedi Virtual Server and MultiDedi Dedicated Server offers where the product description states "C-Servers /24 Subnets Available".
IPv6
The extra IPv6 IPs are only possible to be provided on Full IPv4 + Full IPv6 plans (dual-stack), and, depending on the upstream provider, on IPv4 NAT + IPv6 /64 plans. This page will be updated with the dedicated servers/IPs that support requesting an extra IP.