My Sage will connect to my wireless access point on channel 149. OTOH, an acquaintance in the UK has a wireless router that does not show channels 149-165. Depending on which country your WiFi is configured for, you will find various channels not available (around here for example, 2.4GHz allows channels 1-11 with channels 12,13,14 not being available. Channels 12 and 13 are available in much of the rest of the world and I seem to remember that channel 14 was only used in Japan and only allows 802.11b connections.
A quick search came up with this list:
What channels are supported in both the 2.4 GHz and 5GHz band in most countries?