Path: utzoo!utgpu!watmath!clyde!att!rutgers!tut.cis.ohio-state.edu!cwjcc!hal!nic.MR.NET!uwmcsd1!marque!uunet!munnari!murtoa.cs.mu.oz.au!ditmela!yarra!melba!gnb From: gnb@melba.bby.oz (Gregory N. Bond) Newsgroups: comp.protocols.tcp-ip Subject: Re: Running out of Internet addresses? Message-ID: <55@melba.oz> Date: 30 Nov 88 23:35:30 GMT References: <8811281821.AA00300@bel.isi.edu> <207@logicon.arpa> Organization: Burdett, Buckeridge & Young Ltd, Melbourne Lines: 22 Reply-To: In article <207@logicon.arpa> Makey@LOGICON.ARPA (Jeff Makey) writes: >My calculations give 128 class A networks, 16384 class B networks, and >4194304 class C networks, for a total of about 4.2 million network >numbers. Some of these are reserved and some (about 1200) are already >registered (okay, listed in the host table). Just last week we registered 2 class C addresses in the setup stages of what may become interneted sites. The net numbers were 192.43.blah. Now, assuming net numbers are allocated sequentially, there are approx (44*256) allocated, which is about 11000. So only 1 in 10 assigned numbers is currently interneted. And virtually none (well, 0.25%) of the class C address space has been used. Plenty of room! But class A/B nets may be at a premium. Perhaps the focus should be in combining class C nets (the reciprocal of subnetting?) Greg (who is not an IP guru but owns 2 net numbers). -- Gregory Bond, Burdett Buckeridge & Young Ltd, Melbourne, Australia Internet: gnb@melba.bby.oz.au non-MX: gnb%melba.bby.oz@uunet.uu.net Uucp: {uunet,mnetor,pyramid,ubc-vision,ukc,mcvax,...}!munnari!melba.bby.oz!gnb