Common Ports Tools
Well-known port reference and tools: ports 0 to 1023 mapped to services like HTTP 80, HTTPS 443, MySQL 3306 and Redis 6379, the registered and dynamic ranges.
常用端口对照表 (Common Ports) is a frequently consulted reference for developers. Keeping the reference and ready-to-use tools on one page cuts the cost of switching back and forth. All tools below run locally, are free, and need no sign-up.
Related Tools
- 🔌Random Port GeneratorPick valid non-system ports in one click with bulk export, dedupe and range filtering. Choose your own range filter reserved ports batch-generate Choose.
- 🌐IPv4 Subnet CalculatorCIDR calculator showing network, broadcast, host range, mask and wildcard for any prefix from /0 to /32, essential for network planning and firewalls.
- 🔍DNS LookupQuery DNS records including A, AAAA, MX, TXT, NS, CNAME, SOA and CAA via Google or Cloudflare DoH. Inspect record name, type, TTL and data in one click.
- 📡Bandwidth CalculatorCompute download time, speed or file size from the other two with Mbps, Gbps, MB, GB and TB units, and see when bits are confused with bytes. Any two units.
- 🔢IPv4 Address ConverterConvert IPv4 between dotted, decimal, hex and binary formats with reverse DNS, useful for network debugging, protocol analysis and subnet planning work.
- 📜IPv4 Range ExpanderExpand CIDR notation to a full list of individual IP addresses with clean bulk export, ready for firewall rules, network scans and access control lists.