Enter an IP address or domain — the service will check 22 most common ports.
The Port Scanner on 101IP lets you instantly check the status of ports for any IP address or domain. Enter a host and get a list of open, closed, and filtered ports across Web, Email, Remote Access, Database, and other services.
Scanning is performed via TCP connections from 101IP servers. Use this service only to check resources you own or have permission to test.
By default the service checks the 20 most common ports: Web (80, 443), Email (25, 110, 143), SSH, FTP, DNS, and database ports (MySQL, PostgreSQL), among others. You can also manually specify any list or range of ports — for example 1–1024, or a comma-separated set of specific numbers like 22, 80, 443, 8080.
A Filtered status means the connection attempt received no response — the packet was most likely dropped by a firewall before reaching the target port. This can happen due to security rules on the server itself, or because of blocking at the ISP or cloud hosting level, rather than the port being genuinely closed.
Legally, you may only scan servers you own or have explicit written permission to test. Scanning third-party systems without consent may be classified as unauthorized interference with a network and could be prosecuted under applicable law. Please use this tool responsibly and only against hosts you are authorized to inspect.