Bell South RTBH

Does anyone know if Bell South/AT&T (AS6386) has a RTBH BGP community? We just experienced a DoS attack and by the time we got through to support it had stopped. The tech told us they don't offer remote triggered blackholes but I'm not sure they exactly knew what we were asking for. It looks like our other upstream (Qwest) provides RTBH via BGP community "209:0" Thanks in advance! -Tony