Specifically, the problem seems to be affecting all or most of AS7018 (AT&T's backbone) reaching all or most of AS13560 (which includes www.rr.com and vamx01.mgw.rr.com -- the mail exchanger for rr.com). It does not seem to be affecting other RoadRunner AS's across the country, such as AS10311 in San Diego. On Tue, 12 Jun 2001, RJ Atkinson wrote:

ATT.NET appears to have an internal routing anomaly causing RoadRunner (rr.com) to be unreachable to (m)any AT&T customers. Outage has been in place for several hours. RoadRunner says they don't know when ATT.NET will have a fix in place.