Response from Inteliquent:
I spoke with my development team and they indicated that our existing Search ID parameter that is in the API guide works for this call using a quantity of 10,000. You can download the entire inventory using this call with the Search ID parameter in the call.
Alternately we are looking at ways to have this inventory available for a download but that will be a very large file so I am not sure if that will work for you.
Please let me know if you need anything further.