Live
IPv4 Subnet Calculator
Calculate CIDR network, subnet mask, wildcard mask, network address, broadcast address, usable host range, total addresses, and usable host count.
Tech Tool Directory
Free technical tools for networking, DNS, email, security, and IT troubleshooting.
Use browser-based utilities for subnet calculations, network planning, DNS checks, email diagnostics, SSL checks, security references, and practical IT work.
Live tech tools
Available now
These technical tools are currently live and ready to use.
Tech tool categories
Browse by technical task
These categories keep the technical section organized as more tools are added.
Networking Tools
Subnet calculators, IP planning tools, bandwidth references, port tools, uptime calculators, and network troubleshooting utilities.
Open subnet calculator →DNS Tools
Planned tools for DNS lookup, MX lookup, TXT lookup, nameserver checks, CNAME checks, and DNS troubleshooting.
Coming soon →Email Tools
Planned tools for SPF checks, DMARC checks, DKIM references, MX checks, email header analysis, and deliverability troubleshooting.
Coming soon →Security Tools
Planned tools for SSL certificate checks, blacklist checks, password checks, security references, and common hardening utilities.
Coming soon →Server Tools
Planned tools for uptime, storage, logs, certificate dates, patch planning, basic diagnostics, and system administration references.
Coming soon →Developer Tools
Planned tools for JSON formatting, Base64 conversion, hashes, UUIDs, slugs, regex helpers, and test data utilities.
Coming soon →Planned tech tools
Coming next
These planned utilities can expand UtilTrove into a practical technical reference site for admins, developers, students, and home lab users.
Planned
DNS Lookup Tool
Look up A, AAAA, CNAME, MX, TXT, SPF, DMARC, NS, and other common DNS records.
Planned
MX Lookup Tool
Check mail exchanger records for a domain and help troubleshoot email routing.
Planned
SPF Checker
Check SPF records for common syntax problems, missing records, and email sender alignment issues.
Planned
DMARC Checker
Check DMARC policy, reporting addresses, alignment settings, and common configuration warnings.
Planned
SSL Certificate Checker
Check certificate issuer, expiration date, subject names, chain details, and renewal status.
Planned
Port Reference Tool
Search common TCP and UDP ports and see what each port is typically used for.
About UtilTrove tech tools
UtilTrove tech tools are built for quick technical checks, planning, troubleshooting, and documentation. The goal is to provide simple utilities that are useful for IT workers, network admins, developers, students, home lab users, and small business owners.
Networking
Networking tools help with subnet planning, VLAN documentation, IP addressing, routing references, firewall planning, and DHCP scope work.
Email and DNS
DNS and email tools can help diagnose domain records, mail routing, authentication records, delivery issues, and basic configuration problems.
Security checks
Security-focused tools can help review certificates, password strength, blocklist status, exposed services, configuration notes, and common hardening steps.
Technical tool ideas for future growth
Technical tools can bring repeat visitors because many IT and development tasks happen repeatedly. Subnetting, DNS checks, email record checks, certificate checks, port references, text utilities, and formatting tools are useful for troubleshooting and documentation.
For IT admins
Subnet calculators, DNS lookups, SPF checks, DMARC checks, SSL checks, uptime references, and firewall planning tools can support daily admin work.
For home labs
IP planning tools, VLAN references, storage calculators, transfer-time calculators, and service checklists can support lab documentation and setup.
For small businesses
Email authentication checks, domain checks, SSL checks, password tools, QR code tools, and website troubleshooting utilities can support basic operations.
Need another tech tool?
Suggest the next technical utility.
If there is a networking, DNS, email, security, server, or developer tool you want added to UtilTrove, send the idea through the contact page.