Which 2.4 GHz channels are the nonoverlapping standard in the United States?

In the 2.4 GHz band, Wi-Fi channels are 22 MHz wide. To avoid interference, channels must be separated by at least 22 MHz. Channels 1, 6, and 11 are the only three channels in the 2.4 GHz band that are completely non-overlapping in the United States. Channel 1 uses frequencies from 2.401 to 2.423 GHz, channel 6 uses 2.426 to 2.448 GHz, and channel 11 uses 2.451 to 2.473 GHz. Other combinations, like including channel 14, are incorrect because channel 14 is only allowed in Japan and overlaps significantly with channel 11. Other listed options include overlapping channels or channels not standard for non-overlapping use.