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Subnet Cheat Sheet Generator. Printable /0–/32 table. The result stays on this page.

Build site/VLAN IP plan from requirements and export CSV. The result stays on this page.

Generate an IPAM spreadsheet for a given range. The result stays on this page.

Find the next free block of a size in a used list. The result stays on this page.

Network Address Calculator. Network address from IP and mask. The result stays on this page.

Broadcast Address Calculator. Broadcast address from IP and mask. The result stays on this page.

Check whether an IP is a bogon/martian address. The result stays on this page.

Generate in-addr.arpa zone names for a subnet. The result stays on this page.

Expand a compressed IPv6 address to full form. The result stays on this page.

IPv6 Address Compressor. Compress IPv6 address per RFC 5952. The result stays on this page.

Identify GUA, ULA, link-local, multicast, documentation ranges. The result stays on this page.

IPv6 Prefix Splitter. Split a /48 into /56 or /64 subnets. The result stays on this page.

Plan sites and VLANs from an allocated prefix. The result stays on this page.

Derive IPv6 interface ID from MAC address. The result stays on this page.

IPv6 Link-Local from MAC Generator. Generate fe80:: address from a MAC. The result stays on this page.

Generate a random RFC 4193 ULA /48 prefix. The result stays on this page.

Generate ip6.arpa names and PTR records. The result stays on this page.

Embed IPv4 in 64:ff9b::/96 or custom NAT64 prefix. The result stays on this page.

Minimal IPv6 prefixes covering a range. The result stays on this page.

Check whether an IPv6 address is in a prefix. The result stays on this page.

Check AAAA records and IPv6 reachability for a domain. The result stays on this page.

IPv6 Connectivity Test. Test the visitor's IPv6 connectivity. The result stays on this page.

Generate a nibble-aligned addressing plan. The result stays on this page.

Query all common record types for a domain. The result stays on this page.