This map comes via Doug Dawson, who details the ILEC fiber network:
There is one other set of big fiber networks that don’t get as much national attention. These are fiber transport networks built largely by consortiums of independent telephone companies. Most of these networks were constructed as a way for the telcos to gain cheap fiber transport to the world outside of their operating territories. Many of these smaller telcos were held hostage to incredibly expensive special access transport from the RBOCs which made it difficult for them to buy affordable Internet access. Since these networks were originally built a lot of them now have expanded throughout their operating regions and are now connected to cell towers, large businesses, governments, universities and other customers needing fiber transport.
Most of these ILEC-owned networks have joined together to form INDATEL. Here is a map showing the wide-spread footprint of INDATEL-member networks. Through this consortium many of these networks are now interconnected, providing a nearly nationwide fiber footprint. The various members have POPs in all of the biggest cities in their region but then also go to all of the smaller communities that have largely been ignored by most of the other fiber providers, with perhaps the exception of Level 3.
I have no idea if either Verizon or AT&T has considered buying these networks. For a company like Verizon these fiber routes would provide transport into many areas where they don’t have fiber today. The owners of these networks might want to explore the possibility of selling their networks. Now that the networks are in place the ILECs that built these networks are no longer isolated from the rest of the world. A sale would let them capitalize on their investment in fiber at a time when fiber networks have an all-time high valuation.
Of course, the downside to all of this is that if Verizon, AT&T and a few others like CenturyLink gobble up the few remaining independent fiber networks they will have a virtual monopoly on fiber transport. During the XO and Level 3 purchases there were a lot comments filed with regulators expressing concern about the negative impact on competition from fiber consolidation. I’d hate to see us go back to the bad old days where the only option for transport was a handful of the big telcos.