Analyze a single IPv4 address and subnet mask with options to jump to next/previous subnets or adjust the mask.
Network Address:
Broadcast Address:
First Host:
Last Host:
Total Hosts:
Subnet Mask:
Wildcard Mask:
Address type:
Special-purpose block:
Reference:
Globally reachable:
Forwardable:
Note:
PTR lookup name:
Reverse zone:
Reverse delegation:
Delegation boundary:
Parent reverse zone:
Address range:
Suggested RFC 2317 child zone:
Reverse DNS note:
IPv4 Range to Prefix Converter
Convert an IPv4 address range into one or more CIDR blocks that exactly cover the range.
Prefix (Network)
Subnet Mask
IPv4 Subnet Calculator
Given a base network and original CIDR, subdivide it into smaller subnets with a new CIDR.
Subnet
Subnet Mask
CIDR Set Calculator
Normalize, aggregate, analyze, subtract, and export IPv4 CIDR lists.
Show invalid linesAggregated result
Network
Subnet mask
First address
Last address
Addresses
Cleaned input before aggregation (0 networks)
Network
Subnet mask
First address
Last address
Addresses
After exclusions
Network
Subnet mask
First address
Last address
Addresses
Set analysis
Contained networks
Mergeable adjacent networks
MAC Vendor / Formats
Enter a full MAC address or a vendor prefix in almost any common format. The formatter is fully local; vendor lookup uses the bundled offline vendor data.