|
However, if you can get a listing of all RATE CENTERS that are local to you, you can use the LERG's cheaper cousin, the NNACL (NPA-NXX Active Code List), updated with the monthly NNAG (NPA-NXX Activity Guide), to keep a current list of which prefixes are associated with those rate centers. You still have to get the list of local-call rate centers from your local exchange carrier or from the tariffs. However, if you can write your own _script_ to integrate the NNAG into the NNACL, you can keep yourself up-to-date permanently for a one-time $150 cost. Actually, I should add some caveats here. For example, in the Dallas/ Fort Worth area, you have absolutely no way of knowing what prefixes are local or toll except demanding that your local telco give you periodic updates. The reason is that, within a given rate center, some prefixes are ordinary while others may be Metro prefixes. There is nothing in the LERG or NNACL or NNAG data that distinguishes them, but there are many cases where ordinary prefixes in a given rate center are toll (and require 1+) while Metro prefixes in the same rate center are local (and must NOT be dialed with 1+). For example, Dallas to Fort Worth.
|
Favoured: 0
