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Developer Tools2026-03-196 min read

Common Port Numbers Every Developer Should Know

Essential TCP/UDP port numbers: HTTP (80/443), SSH (22), databases, email, and more. With service descriptions.

Essential Ports

22    SSH\n80    HTTP\n443   HTTPS\n3306  MySQL\n5432  PostgreSQL\n6379  Redis\n27017 MongoDB\n8080  HTTP Alt\n8443  HTTPS Alt\n25    SMTP\n587   SMTP (submission)\n993   IMAPS\n53    DNS

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