I have talked to the phone company and they say it is your problem. These are typical of phone calls received by the engineering departments of many radio and television stations these days. Business and residential complaints of having interference from radio and television broadcasters are on the rise. Historically radio and television broadcasters have located their transmitter facilities away from population centers in areas that were typically agricultural.
Land is usually less expensive the further one goes from towns and cities.
And, most broadcast facilities require a fair amount of land for the antennas and buildings. As the population has expanded in most metropolitan areas, business and houses have been built right up to the property lines of many radio and television facilities. Nationwide there are hundreds of thousands of people who have the potential of receiving radio or television interference. Specifically in regard to telephone interference, there has been a world of change since about 1980. Only a business had multiple phones or phone answering equipment.