Carl Moore (VLD/VMB) <cmoore@brl.mil> (08/18/90)
There was a note in this Digest about future Mexican "area codes" of the form 52x after U.S./Canada etc. (country code 1) has prepared for the coming of NNX area codes (in addition to the existing N0X/N1X area codes). Since the x in 52x is not necessarily 0, wouldn't this nix the continued use of 1+7D in some sparsely-populated NPAs? It had been suggested that, since there are a slew of NN0 codes at the head of the list of NPAs of NNX form, some sparsely-populated NPAs could disallow NN0 prefixes and thus continue to use 1+7D in lieu of having to go to 7D or 1+NPA+7D for intra-NPA toll calls.