The channel number varies depending upon your location. I have provided their website where you can input your zip code to find the channel in your area the shows will play. You can even see the different times certain shows are broadcast.
4kids.tv/show/sonic-x
WS4kids
Last time I saw it on it was on the CW channel. And the channel was 57,394,395. that's were you can see sonic x, sonic x Cam's on Saturday's at 8:00-9:00a.m in channel 57, 6:00-7:00 a.m in channel 394, and 9:00-10:00 am on channel 395. I would say 57. :)
it depends on what you have. if you don't have dish make sure you have 9-2. if you have dish its 251. its on at 7:00 in the morning
The channel that sonic x is on 4 fios is channel 12 kk 
channel 9
It's on channel 4.
The channel for Sonic X is Cowpox, channel 11. OK there is no channel 11 cause i have direct TV so it's Ashely channel 57,394,395. And its in the Saturday's in the morning.
678
FOX on Saturday mornings (Sonic X)
Sonic what? Sonic x, sonic underground and the adventures of sonic the hedgehog are all different shows. If you want to see them YouTube has them all. I saw all of sonic x and aosth on YouTube.
Sonic X has recently been played on channel 5, on 4kids.tv at 11:30 on Saturday mornings.
4kids and jetex
Well The Sonic x seires ended for now. I don't think they will be making another season. It ended a while ago
Sonic X season 1-2 was first aired on channel 10 during Cheese TV weekday mornings, then the 3rd season was aired on channel 7 at 11am during the Jetix segment, then 6:30am Saturday mornings but now it is over.
Yeah...they say there IS going to be a 4th season