Pantry of Tools

Networks & data

IT & Networking tools

Straightforward utilities for network planning, troubleshooting, and everyday data questions.

Start with your task

Which tool should I use?

  • Find usable hosts in a subnet

    Start with an IPv4 address and prefix to find its network, broadcast address, and usable host range.

    IPv4 Subnet Calculator

  • Convert a mask or prefix

    Switch between a subnet mask, CIDR prefix, and single-block wildcard mask. No IP address is needed.

    Subnet Mask / CIDR Converter

  • Cover an exact IP range

    Convert inclusive start and end addresses to the smallest exact set of CIDR blocks, or turn a CIDR block into its range.

    CIDR & IP Range Converter

Network toolbox

All networking tools

11 accurate, focused tools for common network calculations, conversions, and connection checks.

11 tools available

What's My IP

See your public IP address and copy it in one click.

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DNS Lookup

Look up common DNS record types with TTL and DNSSEC status.

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Common Port Reference & Search

Search common TCP and UDP ports by number, service, or use.

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IPv4 Address Converter

Convert IPv4 addresses between decimal, integer, hexadecimal, and binary.

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Subnet Calculator

Calculate IPv4 networks, masks, ranges, and usable hosts.

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IPv6 Subnet Calculator

Calculate IPv6 network boundaries, host bits, and address counts.

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MAC Address Formatter & Analyzer

Normalize MAC address formats and inspect address-type bits.

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Subnet Mask / CIDR Converter

Convert CIDR prefixes, subnet masks, and wildcard masks.

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CIDR Calculator & IP Range Converter

Convert between CIDR blocks and exact IPv4 address ranges.

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Download Time Calculator

Estimate transfer time from file size and connection speed.

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Bandwidth Converter

Convert common network and data-rate units without guesswork.

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Built for troubleshooting

Network answers without the noise

This collection covers the small calculations and lookups that come up repeatedly when planning a network or diagnosing a connection. The goal is not to replace specialist software—it is to make common answers immediate.

Every tool includes a practical example, a plain-language explanation, and links to the next relevant utility.