yukt.tools
networking utility

Subnet Mask Converter

Convert CIDR prefix length and IPv4 subnet masks into wildcard masks, host counts, and quick planning notes.

Subnet input

Use one source: CIDR prefix or dotted IPv4 mask

waiting
Fast prefixescommon sizes
Fast masksdotted decimal

Conversion plan

CIDR, mask, wildcard, hosts

No subnet result yet

Enter a CIDR prefix or IPv4 subnet mask, then run the converter to fill the planning panel.

Related tools and guides
networking

CIDR Calculator

Calculate IPv4 network, broadcast, mask, and usable host range from CIDR notation.

open
networking

DNS Dig

Look up A, AAAA, MX, NS, TXT, and SOA records for any domain, similar to the dig command.

open
networking

IP Lookup

Convert IPv4 or IPv6 addresses into location details and ISP / ASN network provider information.

open
networking

Port Range Normalizer

Normalize firewall port lists by expanding ranges, removing duplicates, sorting ports, and collapsing contiguous values.

open