Network Utilities

IP Lookup, CIDR Calculator, MAC Address Lookup, and Port Number Lookup
Examples:

MAC Address Information

AA:BB:CC:DD:EE:FF was not found and is likely randomly generated.
API Call

Get JSON results via command line with either curl or wget.

Try it:
curl "https://steamr.com/aa-bb-cc-dd-ee-ff" 

{
    "mac": "AA:BB:CC:DD:EE:FF",
    "organization": "Unknown"
}