www.worldnet.att.net routing problems

Does anyone have information why ATT's Worldnet portal is being
routed through Splitrock, UIUC and NCSA? It seems to have pretty
much taken the Worldnet site off the net.

nslookup www.worldnet.att.net

Server: localhost
Address: 127.0.0.1

Non-authoritative answer:
Name: www.worldnet.att.net
Addresses: 204.127.43.37, 204.127.12.39

route-views.oregon-ix.net>show ip bgp 204.127.12.39
BGP routing table entry for 204.127.0.0/20, version 4137919
Paths: (1 available, best #1)
  Advertised to non peer-group peers:
    64.166.72.140
  1224 38 10514 7018 5731, (aggregated by 5731 204.127.128.251)
    141.142.12.1 from 141.142.12.1 (141.142.12.1)
      Origin IGP, localpref 100, valid, external, atomic-aggregate, best
route-views.oregon-ix.net>