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IP Range Calculator Examples

Review practical IP Range Calculator examples so you can understand expected input, output, and common patterns faster.

Why examples matter for IP Range Calculator

Use this free IP Range Calculator to find the network address, first usable IP, last usable IP, broadcast address, subnet mask, and total host capacity for an IPv4 subnet. It is useful for subnetting practice, network planning, VLAN design, firewall rules, access lists, lab work, and quick troubleshooting when you need to understand exactly which IP addresses belong to a subnet.

Example pages are especially useful for network tools because they show what good input looks like, what kind of output to expect, and how the tool behaves in common scenarios.

IP Range Calculator examples

Typical /24 office subnet

Input

192.168.1.10/24

Output

Network: 192.168.1.0
Broadcast: 192.168.1.255
Usable range: 192.168.1.1 - 192.168.1.254

Useful for common LAN subnets where almost the entire last octet is available for hosts.

Small /30 point-to-point subnet

Input

10.0.0.5/30

Output

Network: 10.0.0.4
Broadcast: 10.0.0.7
Usable range: 10.0.0.5 - 10.0.0.6

Helpful for understanding very small subnets often used on routed links.

Larger /16 internal range

Input

172.16.5.20/16

Output

Network: 172.16.0.0
Broadcast: 172.16.255.255
Usable range: 172.16.0.1 - 172.16.255.254

Useful when checking large internal networks with many available hosts.

Subnetted /27 branch network

Input

192.168.50.33/27

Output

Network: 192.168.50.32
Broadcast: 192.168.50.63
Usable range: 192.168.50.33 - 192.168.50.62

Helpful when designing smaller VLANs or branch office segments.

Very large /8 network

Input

10.25.7.99/8

Output

Network: 10.0.0.0
Broadcast: 10.255.255.255
Usable range: 10.0.0.1 - 10.255.255.254

Useful for understanding how broad a large private range can be.

Subnet for a /29 block

Input

203.0.113.10/29

Output

Network: 203.0.113.8
Broadcast: 203.0.113.15
Usable range: 203.0.113.9 - 203.0.113.14

Useful when working with small public IP allocations or lab ranges.

Host-only /32 entry

Input

192.168.1.25/32

Output

Network: 192.168.1.25
Broadcast: 192.168.1.25
Usable range: single host

Helpful when checking single-host routes, ACL entries, or exact match addresses.

Invalid CIDR input

Input

192.168.1.300/24

Output

Invalid IPv4/CIDR input

The calculator rejects invalid octets or malformed CIDR values.

How to use these examples

  1. Paste an IPv4 address with CIDR notation such as 192.168.1.10/24 into the input box
  2. Click Run Tool to calculate the subnet details
  3. Review the network address, broadcast address, usable host range, and subnet mask
  4. Use the result for planning, troubleshooting, documentation, or study
  5. If needed, test another CIDR block to compare subnet sizes and ranges

Common mistakes in sample input

Entering an IP without CIDR notation

Fix: Include the prefix length, for example 192.168.1.10/24 instead of just 192.168.1.10.

Confusing the network address with the first usable host

Fix: Remember that the network address identifies the subnet itself and is not normally assigned to a host.

Using the broadcast address as if it were a usable host

Fix: The broadcast address is reserved for the subnet and is not normally assigned to a device.

Assuming all subnet sizes have the same number of usable hosts

Fix: Check the prefix length carefully because a /24, /27, and /30 have very different host capacity.

Mixing host IP planning with ACL or route notation

Fix: Decide whether you need a subnet range, a single host entry, or a summarized network before using the result.

Next steps

After reviewing these examples, run the live tool with your own input. If your task involves a follow-up step, the related page can help you move to the next tool in the workflow.

Run the main tool

Open the main IP Range Calculator page and test your own real input.

Open IP Range Calculator