ftp.sco.com not found (by my ISP)

From: Dave Dickerson (ddinaz_at_hotmail.com)
Date: 07/21/04 

Date: Wed, 21 Jul 2004 13:28:07 GMT

I can no longer access ftp.sco.com over my high-speed Internet
connection (a few months ago I could). I can connect to SCO non-FTP
servers, and to other non-SCO FTP servers.

My high-speed Internet connection is over a wireless system provided
by a local company. As a backup, I maintain a dialup account with
Earthlink.

I can access ftp.sco.com with the dialup.

I can access ftp.sco.com at work (a different ISP), and my friends
with other ISPs in the local area can also access ftp.sco.com.

I've asked my wireless ISP to look into the problem and here is part
of their reply:

    We can't log in through the wireless, but we can through a
    dialup. We have no answer as to why you could connect
    through the wireless a few weeks ago, but cannot do so now. When
    we upgraded our T1's in April, we changed the DNS numbers from
    Time Warner to NewEdge references. We just don't have an
    explanation for why 3 months or so later it would stop working. We
    can log into other FTP sites just fine through the wireless. This
    tells us that there is something that has changed on SCO's end.

When I read this I come to a different conclusion: something has
changed at the ISP's end, not SCO's. There is a possibilility that the
last time I connected to ftp.sco.com (to download 507's MP1), it was
before my ISP upgraded their T1. Could their changing DNS numbers have
an affect on just ftp.sco.com?

Looking for comments from those that know more about Internet
connections than I do so that I can prepare a sound reply to my ISP.

TIA,

DDinAZ