How to add alternate modem phone numbers programmatically

I know, strange question. 

I am trying to automate a process where hardware tech folks, when configuring a new machine, have to go to Network Connections, select a modem and then add alternate phone numbers. They find the alternate numbers by going to a website and keying in an area code. They find the 3 closet and then manually enter them. They are doing this hundreds of times a day; so we would like to automate this if we can.

I have confirmed I can pull the phone numbers down from the site (I am hoping for a web service, but worst case I can pull the html down and parse the numbers out). See the grids at the bottom of this page, where "VA" is the state:

http://locator.1dial.com/locator.asp?search=state&state=VA

My thought is to pull the phone numbers down as needed and\or pull them down periodically and keep a table in a db updated. The next step is to automate the process where the tech person has to manually add these numbers one by one. I would like the tech to "push" a button and all this happens for them; they simply need to confirm the 3 numbers chosen by the "system".  

My assumption is there is some API I can code against to add these phone #'s programmatically, versus requiring the tech to manually enter them. Google is not turning up anything with my searches; maybe I am searching on the wrong terminology. 

Suggestions? Can this be done?