I'm buying VOC because, page-486

I dont think you can just add up the cone size, because they could be counting the same ASNs in both the TPG and iiNet total.

If you look at transit, we are bigger than Telstra, Optus, TPG, iiNet combined.

	Column 1	Column 2	Column 3	Column 4	Column 5	Column 6	Column 7	Column 8
0	AS Rank ▲	Organization	Num. ofASNs	Orgs	ASNs ∇	Prefixes ∇	Addresses ∇	TransitASN Degree ∇
1	35	Telstra Managed Network Services	2	1209	1403	4224	19549952	361
2	43	Vocus Communications	22	857	979	7215	7879168	1332
3	56	Optus Vision	24	584	665	5274	16077312	300
4	70	TPG Telecom Limited	11	494	554	8554	7531008	339
5	74	iiNet Technologies (SA) Pty Ltd	20	474	537	4597	5918208	221
6	359	Nextgen Networks	2	70	82	509	1252608	71
7	606	Internode Pty Ltd	7	35	42	1455	2348544	74

Also of interest on that site, you can see who are our providers (we pay them), peers (free exchange), customers (they pay us) for our backbone, probably some data could be extracted from that to estimate SIO growth, which isnt the same as revenue though.
http://as-rank.caida.org/asns/4826

I think with SGT/Vocus ACCC would complain about consumer competition, only three big competitors rather than four.

SGT/Vocus would be more difficult than TPG/VHA because VHA doesnt have a significant retail or enterprise market, its just mobile.