{"data":[{"number":80,"slug":"80-http","name":"HTTP","brief":"Hypertext Transfer Protocol (HTTP) facilitates communication between web browsers and servers, enabling retrieval of web content such as HTML pages, images, and other resources. It is the foundation of data exchange on the World Wide Web, operating primarily over TCP port 80 in plaintext. Despite being widely used, its lack of encryption exposes data transmissions to various network-based threats.","commonUsage":"Web traffic","protocols":["tcp","udp"],"transport":{"tcp":true,"udp":true,"sctp":false},"official":true,"encrypted":false,"range":"well-known","risk":{"score":4,"level":"caution"},"categories":[{"name":"Web Services","slug":"web-services"}],"views":67323,"updatedAt":"2026-08-13T12:29:16.186Z","url":"https://whatportis.com/ports/80-http"},{"number":135,"slug":"135-microsoft-epmap","name":"Microsoft EPMAP","brief":"Microsoft Endpoint Mapper (EPMAP), commonly operating on port 135, serves as the RPC (Remote Procedure Call) locator service. It allows clients to identify network services available on a Windows host, facilitating communication with components like DHCP, DNS, WINS, and Distributed Component Object Model (DCOM). By mapping UUIDs to network addresses, EPMAP acts as a directory, enabling dynamic discovery of RPC services essential for remote management and inter-process communication in Windows environments.","commonUsage":"RPC Discovery","protocols":["tcp","udp"],"transport":{"tcp":true,"udp":true,"sctp":false},"official":false,"encrypted":false,"range":"well-known","risk":{"score":4,"level":"caution"},"categories":[{"name":"Security","slug":"security"},{"name":"Remote Access","slug":"remote-access"},{"name":"Network Services","slug":"network-services"},{"name":"System","slug":"system"}],"views":51883,"updatedAt":"2026-08-13T12:29:17.607Z","url":"https://whatportis.com/ports/135-microsoft-epmap"},{"number":902,"slug":"902-ideafarm-door-protocol","name":"IdeaFarm Door Protocol","brief":"The IdeaFarm Door Protocol utilizes UDP port 902 for communication purposes, mainly associated historically with the IdeaFarm software systems. Though it is officially registered, the protocol is obscure and largely deprecated, primarily serving as a proprietary communication channel. Its presence on modern networks is rare, and most contemporary uses of port 902 relate instead to VMware services over TCP, not UDP, which can sometimes lead to confusion during network assessments.","commonUsage":"Proprietary comms","protocols":["udp"],"transport":{"tcp":false,"udp":true,"sctp":false},"official":true,"encrypted":false,"range":"well-known","risk":{"score":4,"level":"caution"},"categories":[{"name":"Network Services","slug":"network-services"}],"views":31170,"updatedAt":"2026-08-13T12:29:19.723Z","url":"https://whatportis.com/ports/902-ideafarm-door-protocol"},{"number":902,"slug":"902-vmware-console-udp","name":"VMware Console UDP","brief":"UDP port 902 is primarily used by VMware Server Console for communication between the managed VMware server and the management console. It enables important service functions like remote management, control, and monitoring of virtual infrastructure, ensuring administrators can maintain oversight of VMware environments efficiently through network communications.","commonUsage":"Virtualization Management","protocols":["udp"],"transport":{"tcp":false,"udp":true,"sctp":false},"official":false,"encrypted":false,"range":"well-known","risk":{"score":4,"level":"caution"},"categories":[{"name":"Remote Access","slug":"remote-access"},{"name":"Network Services","slug":"network-services"},{"name":"Virtualization","slug":"virtualization"}],"views":28015,"updatedAt":"2026-08-13T12:29:24.997Z","url":"https://whatportis.com/ports/902-vmware-console-udp"},{"number":593,"slug":"593-http-rpc-endpoint-mapper","name":"HTTP RPC Endpoint Mapper","brief":"Port 593 is primarily used for Remote Procedure Call (RPC) communications over HTTP, facilitating DCOM (Distributed Component Object Model) services within Microsoft ecosystems. It enables client-server communication, component activation, and method invocation, typically in distributed enterprise applications and Exchange servers. Since it multiplexes RPC traffic over HTTP, it also helps traverse firewall restrictions while maintaining interoperability between networked services.","commonUsage":"RPC over HTTP","protocols":["tcp","udp"],"transport":{"tcp":true,"udp":true,"sctp":false},"official":true,"encrypted":false,"range":"well-known","risk":{"score":4,"level":"caution"},"categories":[{"name":"Network Services","slug":"network-services"},{"name":"System","slug":"system"}],"views":26047,"updatedAt":"2026-08-13T12:29:27.257Z","url":"https://whatportis.com/ports/593-http-rpc-endpoint-mapper"},{"number":749,"slug":"749-kerberos-admin","name":"Kerberos Admin","brief":"**Kerberos administration** typically uses port 749 to perform administrative tasks such as managing principals, policies, and key databases within a Kerberos authentication infrastructure. This port facilitates secure and centralized identity management for distributed network environments.","commonUsage":"Kerberos admin","protocols":["tcp","udp"],"transport":{"tcp":true,"udp":true,"sctp":false},"official":true,"encrypted":false,"range":"well-known","risk":{"score":2,"level":"safe"},"categories":[{"name":"Security","slug":"security"},{"name":"Network Services","slug":"network-services"},{"name":"System","slug":"system"}],"views":23624,"updatedAt":"2026-08-13T12:29:29.959Z","url":"https://whatportis.com/ports/749-kerberos-admin"},{"number":992,"slug":"992-telnet-over-tls-ssl","name":"Telnet over TLS/SSL","brief":"Port 992 is designated for Telnet communications secured through TLS/SSL encryption, augmenting the traditional Telnet protocol by providing a secure channel that protects data integrity and confidentiality during remote command-line sessions. It is used primarily where legacy Telnet access needs to be maintained while enhancing security.","commonUsage":"Secure remote access","protocols":["tcp","udp"],"transport":{"tcp":true,"udp":true,"sctp":false},"official":true,"encrypted":true,"range":"well-known","risk":{"score":4,"level":"caution"},"categories":[{"name":"Security","slug":"security"},{"name":"Remote Access","slug":"remote-access"}],"views":23512,"updatedAt":"2026-08-13T12:29:30.101Z","url":"https://whatportis.com/ports/992-telnet-over-tls-ssl"},{"number":989,"slug":"989-ftps-data","name":"FTPS Data","brief":"Port 989 is primarily used for FTPS data transfer, which is an extension of the traditional FTP protocol secured with TLS or SSL encryption. This port facilitates the encrypted transfer of files between clients and servers, ensuring both confidentiality and integrity during data exchange. FTPS addresses the inherent security weaknesses of standard FTP by adding support for encryption standards widely accepted across industries.","commonUsage":"Secure file-transfer","protocols":["tcp","udp"],"transport":{"tcp":true,"udp":true,"sctp":false},"official":true,"encrypted":true,"range":"well-known","risk":{"score":3,"level":"caution"},"categories":[{"name":"Security","slug":"security"},{"name":"File Transfer","slug":"file-transfer"}],"views":22462,"updatedAt":"2026-08-13T12:29:31.551Z","url":"https://whatportis.com/ports/989-ftps-data"},{"number":990,"slug":"990-ftps-control","name":"FTPS Control","brief":"FTPS (File Transfer Protocol Secure) Control utilizes port 990 to establish an encrypted communication channel for managing connections in an FTP over TLS/SSL environment. It provides authentication and command exchange securely, protecting data integrity and confidentiality during the initiation of file transfers.","commonUsage":"Secure FTP control","protocols":["tcp","udp"],"transport":{"tcp":true,"udp":true,"sctp":false},"official":true,"encrypted":true,"range":"well-known","risk":{"score":3,"level":"caution"},"categories":[{"name":"Security","slug":"security"},{"name":"File Transfer","slug":"file-transfer"}],"views":21770,"updatedAt":"2026-08-13T12:29:32.837Z","url":"https://whatportis.com/ports/990-ftps-control"},{"number":143,"slug":"143-imap","name":"IMAP","brief":"Internet Message Access Protocol (IMAP) enables email clients to access, manage, and synchronize email messages stored on a remote mail server. Unlike older protocols like POP3, IMAP allows users to view their mailbox contents from multiple devices while keeping messages on the server, maintaining consistent state across platforms. IMAP supports functions such as folder management, message searching, selective download, and flagging, providing a comprehensive solution for modern email management as defined in RFC 3501.","commonUsage":"Email retrieval","protocols":["tcp","udp"],"transport":{"tcp":true,"udp":true,"sctp":false},"official":true,"encrypted":false,"range":"well-known","risk":{"score":4,"level":"caution"},"categories":[{"name":"Email","slug":"email"},{"name":"Network Services","slug":"network-services"}],"views":20665,"updatedAt":"2026-08-13T12:29:34.850Z","url":"https://whatportis.com/ports/143-imap"},{"number":623,"slug":"623-asf-rmcp","name":"ASF-RMCP","brief":"ASF Remote Management and Control Protocol (ASF-RMCP) is a standardized protocol enabling remote monitoring, management, and control of computer systems and devices at the platform hardware level. Primarily used by IT administrators, ASF-RMCP facilitates out-of-band management for devices regardless of their operating system status, making it valuable for maintenance, troubleshooting, and asset administration.","commonUsage":"Remote management","protocols":["udp"],"transport":{"tcp":false,"udp":true,"sctp":false},"official":true,"encrypted":false,"range":"well-known","risk":{"score":4,"level":"caution"},"categories":[{"name":"Remote Access","slug":"remote-access"},{"name":"Network Services","slug":"network-services"},{"name":"System","slug":"system"}],"views":20465,"updatedAt":"2026-08-13T12:29:35.748Z","url":"https://whatportis.com/ports/623-asf-rmcp"},{"number":22,"slug":"22-ssh","name":"SSH","brief":"<p><strong>Secure Shell (SSH)</strong> is a widely-used network protocol designed to provide secure access and communication with remote systems over an unsecured network. It encrypts login credentials, command execution, file transfers, and tunneling capabilities, making it a fundamental tool for system administrators and developers to securely manage servers and devices.</p>","commonUsage":"Secure remote access","protocols":["tcp","udp"],"transport":{"tcp":true,"udp":true,"sctp":false},"official":true,"encrypted":true,"range":"well-known","risk":{"score":4,"level":"caution"},"categories":[{"name":"Security","slug":"security"},{"name":"Remote Access","slug":"remote-access"},{"name":"Network Services","slug":"network-services"}],"views":20349,"updatedAt":"2026-08-13T12:29:35.920Z","url":"https://whatportis.com/ports/22-ssh"},{"number":201,"slug":"201-appletalk-routing","name":"AppleTalk Routing","brief":"AppleTalk Routing Maintenance (RTMP) port is used for maintaining and updating routing tables within AppleTalk networks. This service facilitates route discovery, management, and the dissemination of route updates ensuring seamless data delivery across interconnected Apple devices. Primarily, it helps routers to advertise their network reachability and adapt to topology changes dynamically.","commonUsage":"Routing Protocol","protocols":["tcp","udp"],"transport":{"tcp":true,"udp":true,"sctp":false},"official":true,"encrypted":false,"range":"well-known","risk":{"score":4,"level":"caution"},"categories":[{"name":"Network Services","slug":"network-services"},{"name":"System","slug":"system"}],"views":19672,"updatedAt":"2026-08-13T12:29:36.727Z","url":"https://whatportis.com/ports/201-appletalk-routing"},{"number":502,"slug":"502-modbus-protocol","name":"Modbus Protocol","brief":"Port 502 is primarily associated with Modbus, a widely used industrial automation protocol. It facilitates communication between supervisory computers, controllers, and field devices like PLCs over TCP/IP networks.","commonUsage":"Industrial Control","protocols":["tcp","udp"],"transport":{"tcp":true,"udp":true,"sctp":false},"official":false,"encrypted":false,"range":"well-known","risk":{"score":4,"level":"caution"},"categories":[{"name":"Network Services","slug":"network-services"},{"name":"System","slug":"system"},{"name":"IoT","slug":"iot"}],"views":19239,"updatedAt":"2026-08-13T12:29:37.309Z","url":"https://whatportis.com/ports/502-modbus-protocol"},{"number":563,"slug":"563-nntps","name":"NNTPS","brief":"NNTPS (Network News Transfer Protocol Secure) is the encrypted version of NNTP, which facilitates the distribution, querying, retrieval, and posting of Usenet articles using TLS/SSL encryption to ensure privacy and integrity during data transmission.","commonUsage":"Secure Usenet","protocols":["tcp","udp"],"transport":{"tcp":true,"udp":true,"sctp":false},"official":true,"encrypted":true,"range":"well-known","risk":{"score":2,"level":"safe"},"categories":[{"name":"Web Services","slug":"web-services"},{"name":"Security","slug":"security"}],"views":18095,"updatedAt":"2026-08-13T12:29:38.692Z","url":"https://whatportis.com/ports/563-nntps"},{"number":991,"slug":"991-netnews-administration-system","name":"Netnews Administration System","brief":"**NAS (Netnews Administration System)** is a protocol designed to manage and facilitate the administration of Usenet newsgroups, allowing for efficient control of news server configurations, moderation settings, and distribution policies. Operating over both TCP and UDP, it assists administrators in maintaining the integrity and smooth operation of news distribution networks.","commonUsage":"Usenet management","protocols":["tcp","udp"],"transport":{"tcp":true,"udp":true,"sctp":false},"official":true,"encrypted":false,"range":"well-known","risk":{"score":4,"level":"caution"},"categories":[{"name":"Network Services","slug":"network-services"},{"name":"System","slug":"system"}],"views":17907,"updatedAt":"2026-08-13T12:29:39.498Z","url":"https://whatportis.com/ports/991-netnews-administration-system"},{"number":194,"slug":"194-internet-relay-chat","name":"Internet Relay Chat","brief":"Internet Relay Chat (IRC) is an early and influential chat protocol that enables real-time text communication between multiple users over the Internet. Utilizing a centralized server, IRC allows users to join channels or create private conversations, fostering vibrant, often topic-specific communities. While less dominant today, it remains popular in niche circles, particularly among developers and tech enthusiasts.","commonUsage":"Group Chat","protocols":["tcp","udp"],"transport":{"tcp":true,"udp":true,"sctp":false},"official":true,"encrypted":false,"range":"well-known","risk":{"score":4,"level":"caution"},"categories":[{"name":"Voice and Chat","slug":"voice-and-chat"}],"views":17473,"updatedAt":"2026-08-13T12:29:40.538Z","url":"https://whatportis.com/ports/194-internet-relay-chat"},{"number":42,"slug":"42-nameserver-arpa-hostname","name":"NameServer (ARPA Hostname)","brief":"Port 42 was historically assigned to the Host Name Server Protocol (NameServer), a part of the ARPA Network designed to manage and resolve hostnames in early networking environments, predating more modern DNS protocols. Though largely obsolete today, understanding this port helps contextualize the evolution of network naming solutions.","commonUsage":"Legacy hostname resolution","protocols":["tcp","udp"],"transport":{"tcp":true,"udp":true,"sctp":false},"official":true,"encrypted":false,"range":"well-known","risk":{"score":4,"level":"caution"},"categories":[{"name":"Network Services","slug":"network-services"},{"name":"System","slug":"system"}],"views":17157,"updatedAt":"2026-08-13T12:29:41.114Z","url":"https://whatportis.com/ports/42-nameserver-arpa-hostname"},{"number":53,"slug":"53-dns","name":"DNS","brief":"DNS (Domain Name System) commonly utilizes port 53 to translate human-readable domain names into numerical IP addresses essential for internet communication. While most DNS queries occur via UDP for efficiency, TCP is used for tasks that require reliability, such as zone transfers and larger query responses. DNS acts as the backbone of internet navigation, enabling users to access websites and services seamlessly by resolving hostnames into routable addresses.","commonUsage":"Name Resolution","protocols":["tcp","udp"],"transport":{"tcp":true,"udp":true,"sctp":false},"official":true,"encrypted":false,"range":"well-known","risk":{"score":2,"level":"safe"},"categories":[{"name":"Network Services","slug":"network-services"},{"name":"System","slug":"system"}],"views":16703,"updatedAt":"2026-08-13T12:29:41.578Z","url":"https://whatportis.com/ports/53-dns"},{"number":135,"slug":"135-dce-rpc-endpoint-mapper","name":"DCE/RPC Endpoint Mapper","brief":"_Port 135 is primarily used by Microsoft RPC Endpoint Mapper, a crucial function for locating network services used by Windows systems and DCE/RPC frameworks. It facilitates communication between clients and available services by helping clients determine what dynamic ports specific RPC services are listening on._","commonUsage":"RPC service discovery","protocols":["tcp","udp"],"transport":{"tcp":true,"udp":true,"sctp":false},"official":true,"encrypted":false,"range":"well-known","risk":{"score":4,"level":"caution"},"categories":[{"name":"Remote Access","slug":"remote-access"},{"name":"Network Services","slug":"network-services"},{"name":"System","slug":"system"}],"views":16691,"updatedAt":"2026-08-13T12:29:41.693Z","url":"https://whatportis.com/ports/135-dce-rpc-endpoint-mapper"},{"number":546,"slug":"546-dhcpv6-client","name":"DHCPv6 Client","brief":"DHCPv6 Client is the Dynamic Host Configuration Protocol designed specifically for IPv6 networks. It automates the process of assigning IPv6 addresses and other configuration details to client devices, enabling seamless integration into IPv6-enabled networks. Unlike its IPv4 counterpart, DHCPv6 implements certain protocol-level improvements, including prefix delegation and improved multicast communication, to accommodate the unique requirements of IPv6.","commonUsage":"IPv6 auto-configuration","protocols":["tcp","udp"],"transport":{"tcp":true,"udp":true,"sctp":false},"official":true,"encrypted":false,"range":"well-known","risk":{"score":4,"level":"caution"},"categories":[{"name":"Network Services","slug":"network-services"},{"name":"System","slug":"system"},{"name":"IoT","slug":"iot"}],"views":16647,"updatedAt":"2026-08-13T12:29:42.039Z","url":"https://whatportis.com/ports/546-dhcpv6-client"},{"number":953,"slug":"953-dns-rndc","name":"DNS RNDC","brief":"Port 953 is primarily used by the Remote Name Daemon Control (RNDC), a command utility for controlling the BIND DNS server. It facilitates secure, authenticated communication between administrators and the DNS server, enabling remote management tasks such as reloading zone files and flushing caches. RNDC operates over both TCP and UDP, and by default listens on TCP port 953, providing administrators fine-grained control over DNS server operations.","commonUsage":"DNS management","protocols":["tcp","udp"],"transport":{"tcp":true,"udp":true,"sctp":false},"official":false,"encrypted":false,"range":"well-known","risk":{"score":2,"level":"safe"},"categories":[{"name":"Security","slug":"security"},{"name":"Network Services","slug":"network-services"},{"name":"System","slug":"system"}],"views":16444,"updatedAt":"2026-08-13T12:29:42.384Z","url":"https://whatportis.com/ports/953-dns-rndc"},{"number":42,"slug":"42-wins","name":"WINS","brief":"WINS (Windows Internet Name Service) is a Microsoft NetBIOS Name Server legacy service used primarily for name resolution on Windows networks. It enables clients to register and resolve NetBIOS names to IP addresses, facilitating easier communication in older Windows domain environments.","commonUsage":"Name Resolution","protocols":["tcp","udp"],"transport":{"tcp":true,"udp":true,"sctp":false},"official":false,"encrypted":false,"range":"well-known","risk":{"score":4,"level":"caution"},"categories":[{"name":"Network Services","slug":"network-services"},{"name":"System","slug":"system"}],"views":16416,"updatedAt":"2026-08-13T12:29:42.615Z","url":"https://whatportis.com/ports/42-wins"},{"number":90,"slug":"90-dnsix","name":"DNSIX","brief":"**DNSIX** (DoD Network Security for Information Exchange) facilitates secure attribute-based access control within Department of Defense networks, enabling attribute token mapping to govern data exchange securely across interconnected systems.","commonUsage":"Secure attribute mapping","protocols":["tcp","udp"],"transport":{"tcp":true,"udp":true,"sctp":false},"official":true,"encrypted":false,"range":"well-known","risk":{"score":2,"level":"safe"},"categories":[{"name":"Security","slug":"security"},{"name":"Network Services","slug":"network-services"},{"name":"System","slug":"system"}],"views":16082,"updatedAt":"2026-08-13T12:29:43.191Z","url":"https://whatportis.com/ports/90-dnsix"},{"number":636,"slug":"636-ldaps","name":"LDAPS","brief":"LDAPS, or Lightweight Directory Access Protocol over TLS/SSL, is an encrypted form of LDAP that facilitates secure communication between directory service clients and servers. It operates over standard port 636 and is widely used in enterprise environments for secure directory queries, authentication, and management, ensuring sensitive data remains confidential during transmission.","commonUsage":"Secure directory","protocols":["tcp","udp"],"transport":{"tcp":true,"udp":true,"sctp":false},"official":true,"encrypted":true,"range":"well-known","risk":{"score":5,"level":"caution"},"categories":[{"name":"Security","slug":"security"},{"name":"Network Services","slug":"network-services"},{"name":"System","slug":"system"}],"views":15629,"updatedAt":"2026-08-13T12:29:44.810Z","url":"https://whatportis.com/ports/636-ldaps"}],"meta":{"total":155,"count":25,"limit":25,"offset":0,"hasMore":true,"sort":"-views"},"links":{"self":"http://localhost:3000/api/v1/ports?protocol=udp&range=well-known","next":"http://localhost:3000/api/v1/ports?protocol=udp&range=well-known&limit=25&offset=25","prev":null}}