Wi-Fi technologies defined by IEEE 802.11b/g/n are operated in the frequency 2.4 GHz, in which the 2.4 GHz spectrum is divided into 14 overlapping. The available channels that are use in a particular country is different according to the regulations of that country. In the United States, for example, FCC regulations only allow channels 1 through 11 to be used. In Europe channels 1–13 are licensed for 802.11b operation (with 1, 5, 9 and 13 usually deployed). In Japan, all 14 channels are licensed for 802.11b operation. In the following tables, we listed the channel ID, central frequency of each channel for each regulatory domain.

Here are some channels for 802.11b/g

Channel Id        Freq in MHz           America   Europe  Japan  Other

1                            2412                       *             *          *         *

2                            2417                       *             *          *         *

3                            2422                       *             *          *         *

4                            2427                       *             *          *         *

5                            2432                       *             *          *         *

6                            2437                       *             *          *         *

7                            2442                       *             *          *         *

8                            2447                       *             *          *         *

9                            2452                       *             *          *         *

10                          2457                        *             *          *         *

11                          2462                        *             *          *         *

12                          2467                                       *          *         *

13                          2472                                       *          *         *

14                          2484                                                   *