Spring 1999 NOC contact drill

Unnamed Administration sources reported that Sean Donelan said:

The oldest and largest NOC contact drill is back. For the next week I
will attempt to use the telephone number provided by each NOC to contact
that provider.

Wonder if anyone outside of spammers does this with email addresses?

Putting asides the spamhaus "noDood@Bif.gov" ones, a large number
of the addresses appear to be just plain obsolete; the sysadm
moved on, etc.