MAC Address Lookup
Look up a network device manufacturer from its MAC address and inspect OUI, assignment block, address type, privacy/randomization status, and normalized formats.
Look Up MAC Address
Accepts colon, hyphen, Cisco dotted, plain hexadecimal, or a 6-digit OUI prefix.
Privacy Note
Vendor & Address Details
Free Online MAC Address Vendor Lookup
The Utiliverse MAC Address Lookup identifies the organization associated with a MAC address prefix and explains the address itself. A standard MAC address is 48 bits, or 6 bytes, and is typically written as 12 hexadecimal digits. The manufacturer portion comes from an IEEE-assigned prefix, while the remaining bits identify an interface within that allocation.
The tool accepts colon-separated, hyphen-separated, Cisco-style, and separator-free formats. It also exposes assignment metadata returned by the live vendor database, including MA-L, MA-M, or MA-S block types when available.
How to Use the MAC Address Lookup
Enter a full MAC address or OUI prefix
Paste the address exactly as you found it. You can also enter only the first six hexadecimal digits when you need an OUI lookup.
Identify the manufacturer
Utiliverse queries a public MAC vendor database and displays the organization assigned to the matching IEEE address block. Vendor results describe the block owner, not necessarily the brand printed on the finished device.
Understand the OUI and IEEE block
The classic OUI is the first 24 bits of many MAC assignments. Modern IEEE allocation types can use other prefix lengths, and the returned block type may identify a more specific MA-L, MA-M, or MA-S assignment.
Check globally unique versus locally administered
The U/L bit in the first octet indicates whether the address is globally administered or locally administered. Locally administered addresses are common with MAC randomization, virtual adapters, containers, and manually configured interfaces.
Check unicast versus multicast
The I/G bit in the first octet distinguishes an individual unicast address from a group multicast address.
Review vendor block details
When available, the result includes the beginning and end of the assigned block, the allocation size, country code, and vendor-record update date. These describe the registered allocation, not the current physical location of a device.
Convert between MAC formats
The normalized-format section shows colon-separated, hyphen-separated, Cisco dotted, and plain hexadecimal versions for easy use across Windows, Linux, macOS, switches, routers, and firewalls.
Practical Uses
Identify unknown devices
Vendor data can help narrow down an unfamiliar device shown by a router, access point, switch, DHCP lease table, or network monitor. Randomized addresses can make this less conclusive.
Network inventory
Administrators can compare DHCP leases, switch forwarding tables, wireless clients, and monitoring data with vendor assignments.
Virtual machine identification
Virtualization products often use recognizable MAC ranges, making vendor lookup useful in server and lab environments.
Security investigations
Vendor information is useful context but not proof of identity because MAC addresses can be changed, spoofed, or locally generated.
Documentation and DHCP reservations
Use the format converter to reduce transcription errors when recording devices, configuring reservations, or copying addresses between systems that use different notation.
MAC Address Lookup FAQ
What part of a MAC address identifies the manufacturer?
The leading IEEE-assigned portion identifies the organization that owns the address block. Traditional OUI assignments use the first 24 bits, though other IEEE assignment types can use different prefix lengths.
Can I look up a MAC address without separators?
Yes. Plain hexadecimal, colon, hyphen, and Cisco dotted formats are supported.
Why does my phone show a different MAC address on each Wi-Fi network?
Many modern devices use per-network randomized or private MAC addresses to reduce tracking.
Can a MAC lookup reveal the exact device model?
Usually not. It identifies the address-block owner, not an exact model or serial number.
Can a MAC address reveal someone's location?
Not from the address alone. The vendor allocation does not identify a device's current physical location.
What does locally administered mean?
It means the address was assigned locally rather than directly using a globally unique IEEE allocation. Randomized and virtual MAC addresses commonly use this form.
Does Utiliverse store lookup history?
This standalone page does not keep a local history. The entered address is sent to the public vendor lookup API to retrieve current assignment information.