BGP Communities for H.E. and Deltacom?

Hi there, Any one know what are the acceptable BGP communities are for H.E. and Deltacom? At one of our POPs we¹re using an aggregate provider and I need to help them to fix some prefixes that I am announcing from another POP (ie. Lower the metric so only use the backhaul for failure of the other side). I was hoping that they would be listed on the One Step¹s bgp community listing. Any links to such documents for both HE and Deltacom would be great and would be much appreciated. Thank you, -graham