The Federal Aviation Administration on Friday published a list of the 50 U.S. airports that can have buffer zones, or areas the place AT&T and Verizon have agreed to restrict 5G alerts for six months.

In a statement, the FAA stated it labored with the aviation group to find out the place the buffer zones would cut back the chance of disruptions, contemplating elements akin to visitors quantity, the variety of low-visibility days, and geographic location. The company stated that many airports will not be presently affected by AT&T and Verizon’s upcoming 5G deployment, a service the wi-fi firms will activate on Jan. 19 after numerous delays.

The buffer zones intention to cut back the potential interference of 5G antennas with airplane devices, known as radar altimeters, that inform pilots how far they are from the bottom. They assist pilots navigate and land planes throughout dangerous climate and stop crashes.

Airports on the list embrace Dallas Love Field, a serious passenger hub for Southwest Airlines, and Chicago O’Hare, which is a big hub for United Airlines and American Airlines. Facilities that function hubs for cargo and private jets, akin to airports in Indianapolis, Northern New Jersey, and New York City, had been additionally a part of these chosen.

In addition, the record contains airports in Austin, Nashville, Houston, Los Angeles, Miami, Seattle, and San Francisco, amongst many others.

The FAA’s announcement comes amid a short lived ceasefire between transportation regulators and aviation teams, who fear that 5G antennas close to some airports might have an effect on the accuracy of altimeters’ readings, and telecommunications regulators and wi-fi firms, who keep that 5G know-how won’t pose questions of safety.

On Monday, AT&T and Verizon agreed to pause their 5G rollout for 2 extra weeks on the request of federal companies. The transfer was a fast about-face from the wi-fi firms, which only a day earlier had fervently put their foot down and stated that agreeing to the petition would have been “an irresponsible abdication of the operating control required to deploy world-class and globally competitive communications networks.”

AT&T and Verizon purchased almost all the C-band radio spectrum auctioned by the Federal Communications Commission final 12 months, spending a mixed complete of nearly $70 billion, to enhance their 5G networks.

Over the next six months, which is how lengthy AT&T and Verizon have agreed to maintain the buffers in place across the 50 airports, the FAA will work with aerospace producers and airways to verify whether or not planes can safely function after the wi-fi firms’ 5G service is turned on.