Official MCP RegistryListed
MAC Address Lookup
Find the organization behind a MAC address or OUI prefix in the IEEE registries. No auth, no key.
First seen 2 Oct 2026. Evidence as of 6 Oct 2026.
1
Tools
From an anonymous probe
1
Source listings
Each with its own history
4
Recorded changes
Since first seen
Tools
| Tool | Description | Behaviour |
|---|---|---|
| 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. | Read-only |
Change history
- lookup: input schema changed
- lookup: input schema changed
- server instructions changed (+"See https://mac.jasontally.com/help for block types and how to read your own MAC address.")
- Listed (registry)
| Source | Listing | First seen | Last seen | Versions |
|---|---|---|---|---|
| Official MCP Registry | com.jasontally.mac/mcp | 2 Oct 2026 | 6 Oct 2026 | 1 |