RFC 1466:Guidelines for Management of IP Address S...
RFC-Ref

5. Conclusion

   This proliferation of class C network numbers may aid in retarding
   the dispersion of class A and B numbers, but it is sure to accelerate
   the explosion of routing information carried by Internet routers.
   Inherent in these recommendations is the assumption that there will
   be modifications in the technology to support the larger number of
   network address assignments due to the decrease in assignments of
   Class A and B numbers and the proliferation of Class C assignments.

   Many proposals have been made to address the rapid growth of network
   assignments and a discussion of those proposals is beyond the scope
   and intent of this paper.

   These recommendations for management of the current IP network number
   space only profess to delay depletion of the IP address space, not to
   postpone it indefinitely.

Google
Web
RFC-Ref