Not thinking that's a type--did you look under area code 541? Those two CLECs serving those rate centers are 360 Networks and Eltopia Communications, neither of which I've heard of before (not that THAT means much). In order to get much out of the links below, click on the rate center name and then look at the other prefixes in each rate center.

533 --> http://www.localcallingguide.com/lca...s=0&nextdays=0

417 --> http://www.localcallingguide.com/lca...s=0&nextdays=0