IPv4 Subnet Size Chart

Use our IPv4 Subnet Size chart as an reference for all public and private IPv4 subnet sizing information including subnet masks, total IPs, usable (public) IPs. Any questions? Leave a comment below. Are you looking to lease bulk IPv4 subnets or IPv6? Click here for our plans.

IPv4 Subnet Size Chart

CIDRSubnet MaskTotal IPsUsable IPs

Private IP ranges

Also known as reserved IP addresses, private IP ranges are used for special purposes.

Address blockAddress rangeNumber of addressesScopeDescription– (local, “this”) network– networkUsed for local communications within a private network– networkShared address space for communications between a service provider and its subscribers when using a carrier-grade NAT– for loopback addresses to the local host– for link-local addresses between two hosts on a single link when no IP address is otherwise specified, such as would have normally been retrieved from a DHCP server– networkUsed for local communications within a private network– networkIETF Protocol Assignments, DS-Lite (/29)– as TEST-NET-1, documentation and examples– Formerly used for IPv6 to IPv4 relay (included IPv6 address block 2002::/16).– networkUsed for local communications within a private network– networkUsed for benchmark testing of inter-network communications between two separate subnets– as TEST-NET-2, documentation and examples– as TEST-NET-3, documentation and examples– use for multicast (former Class D network) as MCAST-TEST-NET, documentation and examples (Note that this is part of the above multicast space.)– for future use[ (former Class E network) for the “limited broadcast” destination address

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