The reason that address can't get out on the net is because there are
no route broadcast for that network--MCI doesn't have it routed to you.
That class C doesn't even appear to belong to you:
lusky@edge>whois 204.100.176.0
County of Riverside (NETBLK-RCOEK-12NET)
7195 Alessandro Blvd
Riverside, Ca. 92506
Netname: RCOEK-12NET
Netblock: 204.100.0.0 - 204.100.255.0
Coordinator:
Wagner, Stephen (SW86) swagner@CO.RIVERSIDE.CA.US
(909)-275-3738
Record last updated on 13-Jul-94.
-- Jonathan R. Lusky | lusky@edge.net http://www.hotrod.com | ------------------------|---------------- Edge Internet Services | (615) 726-8700