MAC Address Analyzer

Normalize MAC-48 and EUI-64 identifiers, convert common formats, inspect generated IEEE OUI matches, analyze multicast/private/special address properties, and export lookup results locally.

OUI data0 prefixes across MA-L / MA-M / MA-S / local fallback0 IEEE sources loaded; 0 local keys repaired
Random mode

History

Lookups are stored locally in this browser.

Identity

00:A0:40:12:34:56

MAC-48
OUI

00:A0:40

Vendor

Unknown vendor

Not present in the generated local OUI data.

Formats

IEEE colon notation
00:A0:40:12:34:56
Windows hyphen notation
00-A0-40-12-34-56
Cisco dotted notation
00A0.4012.3456
Uppercase hexadecimal
00A040123456
Lowercase hexadecimal
00a040123456

Properties

Unicast

Least significant bit of the first octet is 0.

Universally administered

U/L bit is clear; vendor OUI lookup is meaningful when present in the local database.

Data Quality

Usable entries
0
IEEE sources
0/3
Rejected
0
Local repairs
0
Conflicts ignored
0

Registry counts: LOCAL-OUI 0

Source warnings: Generated IEEE database was not loaded; using legacy fallback.

MAC Notes

  • OUI: The first 24 bits identify an IEEE-assigned vendor only when the address is universally administered.
  • LAA: Locally administered or randomized addresses can reuse OUI-looking prefixes without proving vendor ownership.
  • Data: The lookup table is generated from IEEE MA-L, MA-M, and MA-S registries with local fallback entries for coverage gaps.
  • Special ranges: Broadcast, null, IPv4 multicast, and IPv6 multicast destinations are highlighted separately.
  • EUI-64: Modified EUI-64 identifiers with FF:FE insertion show the embedded MAC candidate.
  • Bulk mode: Paste scan or ARP output to extract MAC-like values, summarize vendors/properties, and copy or download JSON/CSV results.