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Digital, Internet & Technology

Network Address Calculator

Find the network address of an IPv4 address and mask, with the bitwise AND shown step by step.

Your inputs

Results

Network address

172.16.32.0

Host part (IP AND wildcard)
0.0.13.200
Prefix
/20

✓Exact calculation — rounded only for display

Notes for this result

  • Computed entirely in your browser; no address is sent anywhere.
Show calculation steps
  1. 10101100.00010000.00101101.11001000 (IP)
  2. & 11111111.11111111.11110000.00000000 (mask)
  3. = 10101100.00010000.00100000.00000000 (network)

What this calculator does

The network address identifies the subnet; it is the IP with all host bits set to zero.

Formula and method

Network = IP AND mask (bit by bit)

Worked example

Calculated by this tool with its default inputs:

Inputs

  • IP address: 172.16.45.200
  • Subnet mask or /prefix: 255.255.240.0

Results

  • Network address: 172.16.32.0
  • Host part (IP AND wildcard): 0.0.13.200
  • Prefix: /20

How to read the results

The host part is the remainder (IP AND wildcard).

Assumptions and limitations

  • Calculated entirely in your browser — addresses and values are never sent to a server.

Questions

Can I use a /prefix instead of a mask?

Yes — enter /20 or 255.255.240.0.

Methodology and verification

Result type
Exact mathematical calculation (rounded only for display)
Formula version
1.0
Automated verification
3 reference and validation test cases, checked against independently computed values. The site cannot be built if any of them fail.
Editorial review
Awaiting human editorial review. The explanation was drafted with AI assistance; the formula and examples are verified by the automated tests above.

Privacy

Everything you enter is calculated in this browser and is not sent to Numerith or anyone else. Inputs are added to a share link only if you choose to include them. Privacy policy