IPv4 and IPv6 Addresses available for immediate lease/rent.
Subnet Calculator
Network, mask and usable addresses for any IPv4 or IPv6 prefix, plus the block you need and what it costs to lease.
The addresses we lease are allocated to LIR SERVICES directly by the RIPE NCC: no reseller, no three-way contracts.
Calculate any IPv4 or IPv6 subnet
How many IP addresses do you need?
Need IPv6 as well?/48 (1 x /48), €100 a yearEnquire/44 (16 x /48), €300 a yearEnquire
Per year, no setup fee. Every lease includes RPKI, geo-location and reverse DNS delegation, and an LoA on request: see the lease page.
IPv4 Prefix Lengths at a Glance
The block sizes people look up most, with what we charge to lease the ones we offer. A dash means we do not lease that size.
| Prefix | Netmask | Addresses | Usable hosts | Lease, per year | Enquire |
|---|---|---|---|---|---|
| /32 | 255.255.255.255 | 1 | 1 | – | |
| /31 | 255.255.255.254 | 2 | 2 | – | |
| /30 | 255.255.255.252 | 4 | 2 | – | |
| /29 | 255.255.255.248 | 8 | 6 | – | |
| /28 | 255.255.255.240 | 16 | 14 | – | |
| /27 | 255.255.255.224 | 32 | 30 | – | |
| /26 | 255.255.255.192 | 64 | 62 | – | |
| /25 | 255.255.255.128 | 128 | 126 | – | |
| /24 | 255.255.255.0 | 256 | 254 | €1,350 | Enquire |
| /23 | 255.255.254.0 | 512 | 510 | €2,700 | Enquire |
| /22 | 255.255.252.0 | 1,024 | 1,022 | €5,400 | Enquire |
| /21 | 255.255.248.0 | 2,048 | 2,046 | Custom quote | Ask |
| /20 | 255.255.240.0 | 4,096 | 4,094 | Custom quote | Ask |
| /19 | 255.255.224.0 | 8,192 | 8,190 | Custom quote | Ask |
| /18 | 255.255.192.0 | 16,384 | 16,382 | Custom quote | Ask |
| /17 | 255.255.128.0 | 32,768 | 32,766 | Custom quote | Ask |
| /16 | 255.255.0.0 | 65,536 | 65,534 | Custom quote | Ask |
See the IP Address Lease page for what every lease includes and the IPv6 plans.
Subnetting Questions
What is a subnet mask?
A subnet mask says which part of an IPv4 address names the network and which part names the host. 255.255.255.0 means the first three numbers are the network and the last is the host, which is the same as writing /24: the first 24 bits are the network.
What is CIDR notation?
CIDR notation writes an address and the length of its network part together, such as 192.0.2.0/24. The number after the slash is how many bits are the network, so a bigger number is a smaller block: a /24 holds 256 addresses and a /25 holds 128.
How many usable addresses are in a /24?
A /24 has 256 addresses. On an ordinary subnet the first (the network address) and the last (the broadcast address) are not given to hosts, which leaves 254 usable addresses. A /31 is a two-address link between two devices and a /32 is a single host, and neither keeps a network or broadcast address aside.
Why is a /24 the smallest IPv4 block you lease?
Most networks filter out routes longer than a /24, so a smaller block could not be reached from much of the internet. A /24, 256 addresses, is the smallest block that is practical to announce on its own.
How big are an IPv6 /48 and a /64?
A /64 is the size of one subnet, a single LAN, and holds more addresses than the whole IPv4 internet. A /48 contains 65,536 of those /64 subnets, which is enough to number a whole site or company network.
Does this calculator send what I type anywhere?
No. The calculation runs in your browser and nothing you enter is sent to us or to anyone else.
Related Services
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