What is funny about AT&T
Is that they use Verizons 3G for their internet. When I do YOUR IP on DSLR, it says sometimes it uses verizons 3G network vzw* and also has its mymode.com too or something like that. AT&T would be more reliable if they had more saturation of towers. But Microcells will fix a lot of the problems.
Sprint always been better than AT&T even on the wired internet
The following statement is true...
The preceding statement was false!!--George Carlin
No, AT&T's network (GSM/EDGE/WCDMA/HSDPA) is incompatible with Verizon's network (CDMA/EVDO). Their backhauls are also not shared.
You are seeing a whois query on the IP address you are assigned, and some carriers (AT&T and Verizon definitely do in some areas - I've seen it before) share from many of the same IP pools that are contracted from a 3rd party vendor.