Check
this out.
Until
1999, there was no Shared Registration System (SRS). Network Solutions (NSI) operated the .com, .net, and .org registries, and was the de jure registrar and registry.
Then... check
this out.
In
1992, Network Solutions, Inc. (NSI) was granted an exclusive contract by the National Science Foundation (NSF) to be the sole Domain name registrar for .com, .net and .org Top Level Domain (TLD) names. NSI also maintained the central database of assigned names called WHOIS. Network Solutions acted as a de facto registrar, selling names directly to end users.
Which begs the question... "Where were these old domains registered?"