Identifiers

• Media access control address (MAC address), a.k.a. Extended Unique Identifier (EUI)
  • wikipedia: MAC address
  • IEEE: iab.txt
  • Organizationally Unique Identifier (OUI) - wikipedia: Organizationally unique identifier
    • standards-oui.ieee.org / oui.txt
  • Variants - MAC-48 (physical, older) / EUI-48 (logical, newer) and EUI-64 (logical, newer):

    Name	Len	Used by (e.g.)
    MAC-48, EUI-48	48 bits, 12 hex	Ethernet 802.11 wireless networks Bluetooth IEEE 802.5 token ring most other IEEE 802 networks Fiber Distributed Data Interface (FDDI) Asynchronous Transfer Mode (ATM), switched virtual connections only, as part of an NSAP address Fibre Channel and Serial Attached SCSI (as part of a World Wide Name) The ITU-T G.hn standard, which provides a way to create a high-speed (up to 1 gigabit/s) local area network using existing home wiring (power lines, phone lines and coaxial cables). The G.hn Application Protocol Convergence (APC) layer accepts Ethernet frames that use the MAC-48 format and encapsulates them into G.hn Medium Access Control Service Data Units (MSDUs).
    EUI-64	64 bits, 16 hex	FireWire IPv6 (Modified EUI-64 as the least-significant 64 bits of a unicast network address or link-local address when stateless autoconfiguration is used) ZigBee / 802.15.4 / 6LoWPAN wireless personal-area networks

    
    "The distinction between EUI-48 and MAC-48 identifiers is purely nominal: MAC-48 is used for network hardware; EUI-48 is used to identify other devices and software. (Thus, by definition, an EUI-48 is not in fact a "MAC address", although it is syntactically indistinguishable from one and assigned from the same numbering space.)" [wikipedia]
     
  • "To convert a MAC-48 into an EUI-64, copy the OUI, append the two octets FF-FF and then copy the organization-specified extension identifier. To convert an EUI-48 into an EUI-64, the same process is used, but the sequence inserted is FF-FE. In both cases, the process can be trivially reversed when necessary. Organizations issuing EUI-64s are cautioned against issuing identifiers that could be confused with these forms. The IEEE policy is to discourage new uses of 48-bit identifiers in favor of the EUI-64 system.
    IPv6 — one of the most prominent standards that uses a Modified EUI-64 — treats MAC-48 as EUI-48 instead (as it is chosen from the same address pool) and toggles the U/L bit (as this makes it easier to type locally assigned IPv6 addresses based on the Modified EUI-64). This results in extending MAC addresses (such as IEEE 802 MAC address) to Modified EUI-64 using only FF-FE (and never FF-FF) and with the U/L bit inverted.[11]" [src]
    

    From	To	Standard Conversion (IPv6 NEVER MAC-48!)
    MAC-48	EUI-64	AA:AA:AA:BB:BB:BB -> AA:AA:AA:FF:FF:BB:BB:BB (Note! FF:FF)
    EUI-48	EUI-64	AA:AA:AA:BB:BB:BB -> AA:AA:AA:FF:FE:BB:BB:BB (Note! FF:FE)

     
• SNMP: SMI Private Enterprise Codes
  • IANA: enterprise-numbers
• Transport Protocol Port Numbers
  • IANA: service-names-port-numbers.xhtml
  • wikipedia: List of TCP and UDP port numbers
• USB: Vendor ID (VID), Product ID (PID)
  • Resources exist but require additional privileges...