What is an FCC ID vs Mac ID?
An FCC ID is an equipment-authorisation identifier showing a device was granted approval under the FCC's authorisation process, made of a grantee code plus a product code. A MAC ID is a hardware network address and is not part of the FCC grant record.
Device labels carry several codes, and two of the most commonly confused are the FCC ID and the MAC ID (or MAC address). They often sit on the same plastic casing, but they answer completely different questions. One traces a device model back to an official authorisation record; the other identifies a network interface on the equipment itself.
What an FCC ID actually is
An FCC ID is an equipment-authorization identifier. According to FCC Public Notice DA 13-669, it is built from a grantee code and an equipment product code. The grantee code can be three or five characters, and the product code may run to up to fourteen characters, which is why FCC IDs vary in length between devices. The grantee portion is tied to the grantee register at organisation level, while the product portion distinguishes the specific piece of equipment covered by the grant.
[1][2]The same FCC notice is careful about what the identifier does not tell you. It does not establish MAC-address formats, a device's cybersecurity, its ownership, or any worldwide permission to operate. In other words, an FCC ID is evidence of an authorisation trail, not a certificate of quality, safety or global legality.
[1]Where the MAC ID differs
The FCC notice defines the FCC ID structure but says nothing about MAC address formats, so this note will not invent details about MAC length, structure or assignment bodies. What can be said from the notice itself is only the negative: the MAC ID is not part of the FCC equipment-authorization identifier, and an FCC grant record does not establish anything about a device's MAC address.
[1]A practical way to keep them apart: the FCC ID answers 'which organisation was granted authorisation for this model of equipment, and under which grant?', while a MAC ID answers a question about an individual unit's network interface. One is a regulatory identifier tied to an organisation and a product; the other is a hardware-level address. If a label shows both, they serve separate purposes and neither substitutes for the other.
[1]A concrete comparison
Suppose you are checking a second-hand router. You note the code printed near the regulatory markings and want to know whether the device was authorised. If the code follows the FCC ID structure described above, you can search it against an equipment grant database and see the grantee organisation, the equipment class and the grant dates. If instead you have copied the MAC ID, that search is unlikely to find the grant, because grant records are indexed by the FCC ID, not by a device's network address. The lesson: identify which code you are holding before you search, and match the complete identifier rather than a fragment.
[1][2]How to check an FCC ID properly
- Match the complete FCC ID, grantee and equipment class, rather than a partial string.
- Check the grantee code, registered organisation name and equipment class against the record you find.
- Read the grant and filing dates in the original record, since facts carry dates and older grants may reflect historical conditions.
- Remember that an FCC record is not a worldwide approval and not a security endorsement.
A lookup tool such as the FCC Equipment ID Lookup on fccidcheck.com is built for exactly this: it joins an FCC ID to the organisation-level grantee register and shows applicant identity, action dates, purpose and published frequency bounds, with observation dates and limitations beside the answer. It is described as a deliberately narrow lookup of approved source fields, so treat its results as a starting point and open the official filing when the decision matters.
[2]Next step: find the FCC ID on your device label, confirm it is the authorisation code rather than the MAC address, and search the complete identifier to read the grant record for yourself.
[2][1]Sources and dates
- https://docs.fcc.gov/public/attachments/DA-13-669A1_Rcd.pdf · accessed 2026-10-18
- https://fccidcheck.com/ · accessed 2026-10-18