Analyze an IPv4 Network
This analyzer supports IPv4 blocks, subnet masks, CIDR notation, equal subnet planning, and host-capacity checks.
Example Data Table
These examples show how the analyzer interprets common IPv4 blocks and host ranges.
| IP Address | Prefix | Network Address | Broadcast Address | Usable Range | Usable Hosts | Class / Type |
|---|---|---|---|---|---|---|
| 192.168.10.14 | /24 | 192.168.10.0 | 192.168.10.255 | 192.168.10.1 - 192.168.10.254 | 254 | Class C / Private |
| 10.24.16.200 | /20 | 10.24.16.0 | 10.24.31.255 | 10.24.16.1 - 10.24.31.254 | 4094 | Class A / Private |
| 172.16.5.130 | /26 | 172.16.5.128 | 172.16.5.191 | 172.16.5.129 - 172.16.5.190 | 62 | Class B / Private |
| 203.0.113.9 | /30 | 203.0.113.8 | 203.0.113.11 | 203.0.113.9 - 203.0.113.10 | 2 | Class C / Documentation |
Formula Used
Network Address = IP Address AND Subnet Mask
Broadcast Address = Network Address OR Wildcard Mask
Wildcard Mask = 255.255.255.255 - Subnet Mask
Total Addresses = 2^(32 - Prefix)
Usable Hosts = 2^(32 - Prefix) - 2 for most networks. For /31, usable endpoints are 2. For /32, the single address represents one host.
Equal Subnets Created = 2^(Borrowed Bits)
Addresses Per Derived Subnet = 2^(32 - New Prefix)
Required Borrowed Bits = ceil(log2(Desired Subnets))
Recommended Prefix = Parent Prefix + Required Borrowed Bits
How to Use This Calculator
1. Enter a valid IPv4 address.
2. Provide either a CIDR prefix or a dotted subnet mask.
3. Add borrowed subnet bits if you want equal subnet planning.
4. Enter desired subnets and host needs for feasibility checks.
5. Click Analyze Network to show the result above the form.
6. Review the network, broadcast, host range, binary values, and planning verdict.
7. Use the CSV or PDF buttons to export the calculated result.
8. Inspect the Plotly graph for a quick capacity overview.
FAQs
1) What does an IP network analyzer calculate?
It calculates subnet mask details, network address, broadcast address, usable host range, total addresses, wildcard mask, class, address type, and planning values for subnetting decisions.
2) Can I enter a subnet mask instead of a CIDR prefix?
Yes. If you provide a valid contiguous subnet mask, the calculator derives the prefix automatically and uses that result for every related computation.
3) Why are usable hosts different from total addresses?
Most IPv4 networks reserve one address for the network identifier and one for broadcast. That is why usable hosts are usually two fewer than the total address count.
4) How does borrowed subnet bits planning help?
Borrowing bits shows how many equal subnets you can create from the parent network and how many usable hosts remain inside each derived subnet.
5) Does the calculator support /31 and /32 blocks?
Yes. It treats /31 as a two-endpoint point-to-point style network and /32 as a single-host route, which avoids misleading host calculations.
6) What is a wildcard mask?
A wildcard mask is the inverse of the subnet mask. It is often used in access control lists, route filters, and device configuration matching rules.
7) What does the planning verdict mean?
It tells you whether your current parent block can satisfy both the desired subnet count and host requirement per subnet without exceeding available bits.
8) Can I use this for IPv6 analysis?
This version is designed for IPv4 subnet analysis. IPv6 uses different addressing rules, notation, and host assumptions, so it should be handled by a dedicated IPv6 calculator.