Subnet Calculator
Calculate IPv4 networks, masks, ranges, and usable hosts.
10 tools
IT Tools
Network, DNS, storage, permissions, and troubleshooting utilities for IT work.
A practical browser workbench for IT troubleshooting
IT Tools on Haivix focuses on the small calculations and lookups that interrupt network, server, storage, Linux, and email work. Calculate a CIDR range, inspect DNS or domain registration, decode an IPv4 value, size a TCP window, or check a common port without installing a desktop suite.
Local calculators keep their input in your browser. The DNS and RDAP tools clearly identify the public resolver or registry service that receives a lookup, so you know when a query leaves the page.
Start with a troubleshooting task
Tip: Use the subnet and IPv4 tools for address planning, DNS and RDAP for public
records, and the sizing calculators as estimates to validate against your real platform.
DNS Lookup
Query A, AAAA, MX, NS, TXT, CNAME, and CAA records.
Domain RDAP Lookup
Check domain registration, status, nameservers, and dates.
Port Lookup
Find common TCP and UDP ports by number or service.
IPv4 Converter
Convert IPv4 addresses between dotted, decimal, hex, and binary.
Chmod Calculator
Build Linux file permissions in octal and symbolic form.
RAID Calculator
Estimate usable capacity, efficiency, and disk fault tolerance.
Bandwidth Calculator
Estimate file transfer time from size, speed, and overhead.
TCP Window Calculator
Calculate bandwidth-delay product and TCP window sizing.
Email Header Analyzer
Inspect delivery hops, delays, and authentication results locally.