Practical utilities for network engineers, IT admins, and MSPs — no sign-up required.
Calculate network address, broadcast address, first and last usable hosts, subnet mask, wildcard mask, and binary breakdown — instantly from any CIDR range.
Open CalculatorComplete IPv4 CIDR reference — subnet masks, wildcard masks, usable hosts, and binary breakdown from /0 to /32.
View Cheat SheetConvert subnet masks between dotted decimal, CIDR prefix, binary, and wildcard formats — auto-detects your input.
Open ConverterList every usable IP address in a subnet. Enter a CIDR range to get a paginated table of all host IPs.
Open FinderLook up the vendor behind any MAC address using the IEEE OUI registry. Identifies network interface manufacturers for any device.
Open LookupLook up TCP and UDP port numbers from the IANA registry. Search by port number or service name, filter by category — covers ports 0-10000.
View ReferenceSearchable reference of all HTTP status codes with descriptions, categories, and common usage examples.
View ReferenceFormat, validate, and minify JSON instantly. Spot errors with line-by-line highlighting and explore data with an interactive tree view.
Open FormatterTest regular expressions against any string in real time. Highlights all matches, shows capture groups, and previews find-and-replace output.
Open TesterConvert YAML to formatted JSON instantly. Supports nested objects, arrays, and multi-level indentation. Clear error messages for invalid YAML.
Open ConverterConvert JSON to clean, readable YAML. Ideal for Kubernetes configs, Ansible playbooks, Docker Compose, and any tool that prefers YAML over JSON.
Open ConverterTest password entropy, estimate crack time, and check Microsoft 365 compliance in real time — nothing leaves your browser.
Open CheckerDecode any SSL/TLS certificate in PEM format. View subject, issuer, validity, SANs, key usage, and fingerprint instantly.
Open DecoderConvert cron expressions to human-readable descriptions. See the next 10 run times, field breakdowns, and common presets.
Open ParserDMC IT Services provides cloud infrastructure design, mobile device management, and secure data destruction for SMBs across London, Cambridge, Hertfordshire, and Bedfordshire.
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