Business numbers only. These are publicly listed business lines, which are exempt from the national Do Not Call registry. Do not use this list to call consumers, and do not generate or dial sequential numbers — that is what TCPA §227 prohibits, at $500–$1,500 per call. Carrier is derived from the LERG prefix tables, so ported numbers (~15–20%) may show their original carrier; the CSV marks this as carrier_confidence = prefix.