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Interactive real-time 32-bit binary map, subnet spectrum bar, CIDR calculator, and range converter.

Browse IP, subnet and CIDR tools by task.

Find address boundaries from a prefix.

Find IPv6 prefix boundaries.

Calculate subnet details from address and mask.

Calculate prefix details and address counts.

Convert prefixes into start–end ranges.

Find exact covering CIDR blocks.

Calculate the corresponding network range.

Find the subnet’s network address.

Find broadcast addresses where applicable.

Identify a range’s endpoints.

Apply the selected subnet-use rules.

Count addresses within a prefix.

Account for applicable address reservations.

Calculate bits available within a prefix.

Identify the network prefix length.

Find a prefix meeting capacity requirements.

Calculate capacity for a specified prefix.

Apply point-to-point addressing rules.

Calculate single-address IPv4 prefix details.

Divide a parent prefix into address pairs.

Calculate single-address IPv6 prefix details.

Convert IPv4 prefixes to dotted masks.

Find prefix length from contiguous masks.

Check mask structure and contiguity.

Calculate the inverse IPv4 mask.

Convert compatible contiguous wildcard masks.

Evaluate address-and-wildcard matching.

Express matching addresses as CIDR blocks.

Check address and prefix syntax.

Check IPv4 or IPv6 address syntax.

Check endpoints and address-family consistency.

Normalize prefixes to network boundaries.

Interpret addresses, prefixes, masks, and ranges.

Convert addresses to binary.

Convert IPv4 addresses to integer values.

Convert integer values to addresses.

Convert addresses to hexadecimal.

Display address bits.

Convert IPv6 addresses to integer values.

Restore omitted hexadecimal groups.

Shorten address notation.

Construct or decode mapped addresses.

Separate prefix and host portions.

Show address-and-mask operations.

Add or subtract address positions.

Count positions between two addresses.

Find an address by range offset.

Find an address’s position within a range.

Find the following same-sized subnet.

Find the preceding same-sized subnet.

Check alignment to a specified prefix.

Test whether an address belongs.

Test membership within a CIDR block.

Compare addresses under a selected mask.

Test whether one subnet contains another.

Detect intersecting address ranges.

Detect overlapping network prefixes.

Find addresses shared between ranges.

Combine address sets.

Remove one address set from another.

Find unallocated addresses within a parent.

Identify directly neighboring ranges.

Combine overlapping or adjacent intervals.

Divide a range at selected boundaries.

Divide a network into equal prefixes.

Count child prefixes within a parent.

Determine prefix length for subnet quantity.

Allocate differently sized subnets.

Check alignment, capacity, and overlaps.

Find a covering parent prefix.

Merge prefixes without adding addresses.

Summarize networks and identify included gaps.

Find one prefix covering a range.

Identify uncovered addresses between allocations.

List child prefixes at a selected length.

Identify subnet bits within a parent.

Allocate child prefixes by requested sizes.

Count available child subnets.

Identify architectural address types.

Check membership in private address blocks.

Use a selected address registry snapshot.

Explain historical classful address categories.

Plan allocation boundaries within a subnet.

Remove specified addresses and ranges.

Count addresses available after exclusions.

Allocate entered static address reservations.

Check an entered gateway against subnet rules.

Find repeated addresses or overlapping allocations.

Assign prefixes to requested VLAN capacities.

Divide a parent range across sites.

Reserve capacity for planned expansion.

Compare recorded allocations with available capacity.

Find gaps in entered allocation records.

Find aligned space within a parent.

Identify scattered free address blocks.

Account for AWS address reservations.

Apply entered provider reservation rules.

Compare entered cloud network allocations.

Compare local and remote address spaces.

Find the most specific matching route.

Compare entered routes with target ranges.

Consolidate equivalent address sets.

Subtract exceptions from allowed ranges.

Test an address against supplied rules.

Generate address-level reverse lookup names.

Generate nibble-format reverse lookup names.

Identify applicable reverse delegation boundaries.

Enumerate a selected, limited address range.

Sample addresses within supplied ranges.

Calculate details for multiple prefixes.

Remove repeated addresses.

Sort addresses numerically.

Standardize addresses, intervals, and prefixes.

Compare two address-set lists.

Identify added and removed addresses.

Create a structured addressing reference.

Show parent and child prefix relationships.

Visualize occupied and available blocks.

Show binary and prefix calculations.

Create address-planning exercises.

Check calculated ranges and masks.

Load existing address allocation records.

Export ranges, prefixes, and allocation details.

Summarize inputs, calculations, and assumptions.

Comprehensive /0 to /32 subnet mask table with usable host counts and class equivalents.

Divide VPCs and Class networks into equal subnets for VLANs and cloud deployments.

Answers to common questions about CIDR, usable hosts, wildcard masks, and IP ranges.

IP range and subnet calculator in Hindi.

IP range and subnet calculator in Spanish.

IP range and subnet calculator in Russian.

IP range and subnet calculator in French.

IP range and subnet calculator in German.

IP range and subnet calculator in Italian.

IP range and subnet calculator in Portuguese.

IP range and subnet calculator in Bengali.

IP range and subnet calculator in Japanese.

IP range and subnet calculator in Korean.

IP range and subnet calculator in Malay.

IP range and subnet calculator in Polish.

IP range and subnet calculator in Indonesian.

IP range and subnet calculator in Arabic.

IP range and subnet calculator in Bulgarian.

IP range and subnet calculator in Turkish.

IP range and subnet calculator in Swedish.

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