[VoiceOps] Ring Central NOC contact?

We have a customer who needs to communicate with a Ring Central customer, but none of our carriers or even aggregators can reach this particular number. Bandwidth, Intelliquent, and a number of others all fail. This seems to be a problem on RC's end, but I have no idea how to reach them. The terminating number is 7195424485, for a business in Pueblo, CO. The number worked fine from us until the customer moved to RC.