[VoiceOps] TN and carrier list in a rate center

I would like to acquire a list of TN's and their respective carriers for a small rate center (14 blocks of numbers) I can do API requests to Twilio or another provider to lookup a carrier per TN, but that is outside of my budget. Does anyone know a more efficient way to acquire this information? Sincerely, Keln Taylor kelntaylor at gmail.com