Great information. You may want to be more specific and use a physical address. My zip provides many carriers that I am unable to get - for instance it provides two different cable companies.
Because of the way the government collects the data (census based) zipcode is the easiest for the consumer to understand and is only a little less accurate (except in really big zip codes).
We're in this for the long haul, so in the future we'd love to hook into the main lookups for the big companies and find the REAL data instead of just using governmental data. We'll see if that happens. ;)
