AT&T

AT&T Services, Inc. operates Autonomous System 7018, the company's core internet backbone and one of the largest in the United States. It carries enterprise, residential, and wholesale traffic across AT&T's extensive fiber and mobile infrastructure, tying the carrier's national footprint to the wider internet. Registered in the United States, AS7018 has been a major backbone since the early commercial internet and remains a common origin and transit network for North American traffic. Its scale reflects AT&T's position as a long-standing telecommunications operator. An address in this network may belong to a residential subscriber, a business circuit, or a backbone link, depending on the block.