MAC Address Lookup

com.jasontally.mac/mcpVersion 1.0.0

Find the organization behind a MAC address or OUI prefix in the IEEE registries. No auth, no key.

Status

Responds125 msNov 14, 2026, 14:02 UTCAnswered our handshake without sign-in.

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Data from the official MCP Registry, checked by run.zero. How we check

Streamable HTTP

https://mac.jasontally.com/mcpResponds125 msNov 14, 2026, 14:02 UTC

No sign-in

claude mcp add --transport http mac https://mac.jasontally.com/mcp

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Settings > Connectors > Add custom connector
Name: mac
Remote MCP server URL: https://mac.jasontally.com/mcp

{
  "mcpServers": {
    "mac": {
      "url": "https://mac.jasontally.com/mcp"
    }
  }
}

code --add-mcp '{"name":"mac","type":"http","url":"https://mac.jasontally.com/mcp"}'

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1 tools

Tools of MAC Address Lookup
	Description		Read-only	Idempotent	Open world
`lookup`Resolve a MAC address or OUI prefix to its registered organization using longest-prefix match across the MA-L, MA-M, MA-S, IAB, and CID registries. Reports the block type, address count, registration country, and a link to the full record page. Randomized and locally administered addresses usually have no registered organization.	Resolve a MAC address or OUI prefix to its registered organization using longest-prefix match across the MA-L, MA-M, MA-S, IAB, and CID registries. Reports the block type, address count, registration country, and a link to the full record page. Randomized and locally administered addresses usually have no registered organization.	No	Yes	Yes	No

Registry status: Active
Published: Oct 2, 2026
Updated: Oct 2, 2026
Website: https://mac.jasontally.com/⁠ (opens in a new tab)
Repository: https://github.com/jasontally/mac-address-lookup⁠ (opens in a new tab)
Categories (suggested): Search and webSuggested categories are assigned automatically from the registry text and may be wrong. Verified operators can correct them.
GDPR: Not declared