IP & subnet
Subnet, CIDR, IPv4 and IPv6 maths, and IP representation.
24 tools · nothing uploaded
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- PopularBandwidth CalculatorHow much bandwidth your traffic actually needs, including the peak.
- PopularBrowser Information CheckerEverything your browser reports about itself.
- PopularCIDR CalculatorTurn a CIDR prefix into a mask, a host count and a usable range.
- Data Transfer CalculatorWork out transfer time for any size at any speed.
- PopularDownload Time CalculatorHow long a file really takes, with protocol overhead counted.
- PopularInternet Speed CalculatorTurn a connection speed into real download times.
- IP Range CalculatorFind the first and last usable address in any block.
- IP to Binary ConverterSee an IPv4 address in binary, decimal, hex and octal.
- IP to Decimal ConverterConvert an IPv4 address to its 32-bit integer form and back.
- PopularIPv4 CalculatorWork out everything about an IPv4 address and its subnet.
- PopularIPv4 to IPv6 ConverterEvery way an IPv4 address can be written in IPv6.
- PopularIPv6 CalculatorExpand, compress and subnet an IPv6 address.
- MAC Address GeneratorGenerate valid locally-administered MAC addresses.
- PopularMAC Address LookupRead the OUI, assignment type and every notation of a MAC.
- MAC Address ValidatorCheck a MAC address is valid and see what its bits mean.
- MTU CalculatorWork out MTU, MSS and the overhead each tunnel adds.
- PopularNetwork Latency CalculatorThe ping floor physics sets for any distance.
- Packet Loss CalculatorWork out loss rate and what it does to throughput.
- PopularSubnet CalculatorNetwork, broadcast, host range and mask for any IPv4 block.
- PopularSubnet Mask CalculatorConvert between a subnet mask, a prefix length and a wildcard mask.
- TCP Header AnalyzerDecode a TCP header from hex — ports, flags, window and sequence.
- PopularUpload Time CalculatorHow long an upload takes at your connection speed.
- PopularUser Agent TesterParse any user agent into browser, engine, OS and device.
- PopularWebSocket TesterGenuinely connect to a WebSocket and send messages.