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🔖 MAC Address Tool
A MAC address identifies a piece of network hardware. The first three bytes (OUI) tell you who made it — Apple, Cisco, Intel, etc. This tool validates any MAC, formats it different ways (colons, hyphens, Cisco-style dots, or no separators), and tells you the vendor from a built-in OUI database.
Examples
00:1A:2B:3C:4D:5EVendor: Cisco Systems · Also: 00-1A-2B-3C-4D-5E or 001a.2b3c.4d5eF4:5C:89:12:34:56Vendor: Apple, Inc.Frequently asked questions
Can MAC addresses be spoofed?
Yes, trivially. Most OSes let you set a fake MAC. iOS and Android randomize per-WiFi automatically to prevent tracking.
Why look up the manufacturer?
Identify rogue devices on a network, troubleshoot connectivity, or reverse-engineer what devices appear in a packet capture.
About this calculator
MAC Address Tool runs entirely in your browser using standard formulas. No data is sent to any server. We don't share your inputs with lenders, brokers, or anyone else — there's no funnel and no follow-up email.
Related tools
- 🆔 What is My IP — Show your public IPv4 and IPv6 addresses with approximate location.
- 🧮 Subnet / CIDR Calculator — Calculate network, broadcast, host range, mask from any CIDR notation.
Why this tool
vs typical free network-tools sites
| NetToolset | Typical free site | |
|---|---|---|
| Price | Free | Free |
| Signup required | No | Often (for advanced features) |
| Ads inside the tool | No | Yes (banner + interstitial) |
| Logs your IP / queries | No | Yes (often resold) |
| Data sent to a server | Math runs in browser; lookups hit Cloudflare DoH directly | Yes (all goes through their server) |
| Open source | Yes | No |
| Bookmarkable URL per tool | Yes | Mixed |
| Multilingual | EN / ES / PT / FR / DE | Usually EN only |
| Loads in under 1s | Yes (static) | Often slow (ad tracking) |