Tip: use samples, upload, copy, download, and send-to actions inside the workspace where available.
Port Lookup is a free, browser-based tool that helps you get the job done quickly. Look up well-known TCP/UDP service ports. It's built for speed and privacy: Everything runs locally in your browser — your data is never uploaded to a server. No sign-up, no installs, and no daily limits.
Use this tool as the focused step in a larger browser-based workflow.
Review the preview, copy or download the result, and keep everything local in your browser.
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Open tool44 of 44 ports shown
| Port | Proto | Service | Description |
|---|---|---|---|
| 20 | TCP | FTP-Data | FTP data transfer channel. |
| 21 | TCP | FTP | FTP control channel for file transfers. |
| 22 | TCP | SSH | Secure Shell for encrypted remote login. |
| 23 | TCP | Telnet | Unencrypted text communication protocol. |
| 25 | TCP | SMTP | Simple Mail Transfer Protocol for email routing. |
| 53 | UDP/TCP | DNS | Domain Name System — resolves hostnames to IPs. |
| 67 | UDP | DHCP Server | DHCP server — assigns IP addresses to clients. |
| 68 | UDP | DHCP Client | DHCP client — receives IP configuration from server. |
| 69 | UDP | TFTP | Trivial File Transfer Protocol — simple, no auth. |
| 80 | TCP | HTTP | Hypertext Transfer Protocol for web traffic. |
| 110 | TCP | POP3 | Post Office Protocol v3 — retrieves emails from server. |
| 119 | TCP | NNTP | Network News Transfer Protocol for Usenet. |
| 123 | UDP | NTP | Network Time Protocol — synchronises clocks. |
| 143 | TCP | IMAP | Internet Message Access Protocol — manages emails on server. |
| 161 | UDP | SNMP | Simple Network Management Protocol — monitors network devices. |
| 389 | TCP | LDAP | Lightweight Directory Access Protocol. |
| 443 | TCP | HTTPS | HTTP over TLS/SSL — secure web traffic. |
| 465 | TCP | SMTPS | SMTP over SSL — secure email submission (legacy). |
| 514 | UDP | Syslog | Standard protocol for sending log messages. |
| 587 | TCP | SMTP Submission | Email submission with STARTTLS (modern standard). |
| 631 | TCP | IPP | Internet Printing Protocol. |
| 636 | TCP | LDAPS | LDAP over SSL — secure directory access. |
| 993 | TCP | IMAPS | IMAP over SSL — secure email access. |
| 995 | TCP | POP3S | POP3 over SSL — secure email retrieval. |
| 1080 | TCP | SOCKS | SOCKS proxy protocol. |
| 1433 | TCP | MSSQL | Microsoft SQL Server database. |
| 1521 | TCP | Oracle DB | Oracle Database listener. |
| 1883 | TCP | MQTT | Message Queuing Telemetry Transport — IoT messaging. |
| 2049 | TCP | NFS | Network File System — remote file sharing. |
| 2375 | TCP | Docker | Docker daemon (unencrypted). |
| 2376 | TCP | Docker TLS | Docker daemon over TLS. |
| 3000 | TCP | Dev Server | Common development server port (Node/React/etc.). |
| 3306 | TCP | MySQL | MySQL / MariaDB database. |
| 3389 | TCP | RDP | Remote Desktop Protocol — Windows remote access. |
| 5000 | TCP | Dev Server | Alternative development server port (Flask, etc.). |
| 5432 | TCP | PostgreSQL | PostgreSQL relational database. |
| 5672 | TCP | AMQP | Advanced Message Queuing Protocol (RabbitMQ). |
| 6379 | TCP | Redis | Redis in-memory data structure store. |
| 8080 | TCP | HTTP-alt | Alternate HTTP port — common for proxies and dev. |
| 8443 | TCP | HTTPS-alt | Alternate HTTPS port. |
| 9000 | TCP | SonarQube / Dev | SonarQube web UI or generic dev server. |
| 9092 | TCP | Kafka | Apache Kafka message broker. |
| 9200 | TCP | Elasticsearch | Elasticsearch REST API. |
| 27017 | TCP | MongoDB | MongoDB NoSQL database. |
