Antennas, Antenna Cables, Wireless Products: Technical Articles
Legal & Illegal Frequencies & Channels In the United States
LEGAL & ILLEGAL Frequencies 4.9GHz to 5.825
(United States only)
| Channel | Frequency | United States |
| (MHz) | 40/20 MHz | |
| 183 | 4915 | ILLEGAL |
| 184 | 4920 | ILLEGAL |
| 185 | 4925 | ILLEGAL |
| 187 | 4935 | ILLEGAL |
| 188 | 4940 | ILLEGAL |
| 189 | 4945 | ILLEGAL |
| 192 | 4960 | ILLEGAL |
| 196 | 4980 | ILLEGAL |
| 7 | 5035 | ILLEGAL |
| 8 | 5040 | ILLEGAL |
| 9 | 5045 | ILLEGAL |
| 11 | 5055 | ILLEGAL |
| 12 | 5060 | ILLEGAL |
| 16 | 5080 | ILLEGAL |
| 34 | 5170 | ILLEGAL |
| 36 | 5180 | LEGAL |
| 38 | 5190 | ILLEGAL |
| 40 | 5200 | LEGAL |
| 42 | 5210 | ILLEGAL |
| 44 | 5220 | LEGAL |
| 46 | 5230 | ILLEGAL |
| 48 | 5240 | LEGAL |
| 52 | 5260 | LEGAL |
| 56 | 5280 | LEGAL |
| 60 | 5300 | LEGAL |
| 64 | 5320 | LEGAL |
| 100 | 5500 | LEGAL |
| 104 | 5520 | LEGAL |
| 108 | 5540 | LEGAL |
| 112 | LEGAL | |
| 116 | 5580 | LEGAL |
| 120 | 5600 | ILLEGAL |
| 124 | 5620 | ILLEGAL |
| 128 | 5640 | ILLEGAL |
| 132 | 5660 | ILLEGAL |
| 136 | 5680 | LEGAL |
| 140 | 5700 | LEGAL |
| 149 | 5745 | LEGAL |
| 153 | 5765 | LEGAL |
| 157 | 5785 | LEGAL |
| 161 | 5805 | LEGAL |
| 165 | 5825 | LEGAL |
2.4GHz (802.11n/g/b) is legal in all countries, but note the following:
- Channels 1-12 are legal in the United States
- Channels 13-14 are illegal to use in the United States
3.65ghz works on a registration system
The application fee for a nationwide 3.65 GHz license is less than $300.
The 3.65 GHz band is non-exclusive and, therefore, interference is a concern, but it is not an unlicensed band in the true meaning of the word, since licensing and registration is required to use 3.65. Once a license is obtained, every base station operating under that license must be registered in a national database. This encourages coordination among operators to reduce interference.
4.9GHz is reserved for public safety applications
NOTICE FOR CUSTOMERS: purchasing equipment with 5GHz capabilities: IMPORTANT to read this:
Customer agrees to, and assumes responsibility for, use of only legal bandwidth frequencies. Please review this page of frequencies that are legal and illegal in the United States, in the range of 4.9 to 5.85GHz.
Ubiquiti 5GHz equipment (M5 / AirMax): Starting in May 2011, Ubiquiti is designating two versions, each with different firmware US and World. The part# ends with either "US" or "World." The US version firmware will have restrictions to use only in the legal frequency bands/channels.
Customers who purchase for use in the United States:
- We strongly recommend and encourage you to buy only the US versions, which have firmware programmed to work only on the legal frequencies.
- If you buy the World version for use in the United States: The act of your purchase is your acknowledgement of your agreement and intention to use only legal frequency bands.