Wildcard Mask & ACL Generator
Runs in your browser — nothing is uploaded
CIDR (/24), a subnet mask (255.255.255.0), or a wildcard mask after a space (0.0.0.255).
- Network address
- Broadcast address
- Subnet mask
- Wildcard mask
- CIDR prefix
- Address range
- Usable hosts
- Enter an IPv4 address with a prefix (192.168.1.0/24), a subnet mask or a wildcard mask.
- This wildcard mask is not contiguous. It matches a pattern of addresses, not one subnet, so it has no CIDR prefix.
- any (all addresses)
- Copy
- The source is not valid.
- The destination is not valid.
- Ports must be 1 to 65535, or a range like 8000-8100.
- Wildcard masks are the inverse of subnet masks: a 0 bit must match, a 1 bit is ignored. Cisco ACLs and OSPF network statements use them. Always review the lines and check the order, because the first matching rule wins and every ACL ends with an implicit deny.
- Cisco IOS (wildcard masks)
- Cisco ASA (subnet masks)
- Arista / NX-OS (CIDR)
- Enter an address to calculate.
About this tool
Convert between CIDR prefixes, subnet masks and wildcard masks, then generate access control list (ACL) lines for Cisco IOS, Cisco ASA and CIDR-style syntax. Everything is calculated in your browser.
Frequently asked questions
What is Wildcard Mask & ACL Generator?
Convert CIDR, subnet and wildcard masks and generate Cisco ACL lines. It is one of the Network Tools tools on MyCodeTips.
How do I use Wildcard Mask & ACL Generator?
Open the tool, enter or paste your input, and the result appears right away. Use the Copy button to copy it.
Is Wildcard Mask & ACL Generator free to use?
Yes. It is free to use and does not need an account.
Is my data safe with Wildcard Mask & ACL Generator?
Yes. It runs entirely in your browser, so what you enter is never uploaded to our servers.
Can I share my result?
Yes. Use the share buttons below the tool to post a link or copy a link to the tool page.
Which tools are related to Wildcard Mask & ACL Generator?
CIDR / Subnet Calculator, Route Summarization Calculator.
Related tools
- CIDR / Subnet Calculator
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