IP Range Calculator
Read the inclusive range of a block, from the network address through the broadcast, and the tighter usable host range inside it. Firewall objects and IPAM exports usually want the inclusive pair. DHCP scopes usually want the usable pair.
Two ranges, on purpose
The inclusive block for 172.16.5.4/22 is 172.16.4.0 through 172.16.7.255. That is every address the prefix covers, including the network and broadcast.
The usable host range drops those two ends: 172.16.4.1 through 172.16.7.254. On a /31 those ends are not dropped, because both addresses are hosts.
Questions
No. The range starts at the network address of the prefix, which may be lower than the address you entered.
Use the network address with the wildcard mask, not a from-to host list, unless the ACL syntax asks for an inclusive range.
Sources
Reviewed 8 October 2026. The methodology page records what these labels do not cover.
Related tools
- Subnet CalculatorNetwork, broadcast, mask, and usable hosts for an IPv4 address and prefix.
- Subnet SplitterDivide a network into equal, non-overlapping subnets.
- Wildcard Mask CalculatorInvert a subnet mask into the wildcard bits an ACL checks.
- IP in CIDR CheckerTest whether one address belongs to a network.
