GBS Reports Major Growth in ZoneCasting, MaxxCasting

RADIO ONLINE | Thursday, December 4, 2025 | 2:39pm CT

GeoBroadcast Solutions (GBS)

GeoBroadcast Solutions (GBS) says its booster-based ZoneCasting and MaxxCasting technologies are now improving FM radio coverage, spectrum efficiency, and local service in markets reaching nearly 20 million listeners, according to a new filing with the Federal Communications Commission.

In the ex parte filing, submitted on December 4, GBS outlines rapid nationwide deployment over the past year. ZoneCasting and MaxxCasting systems are now operating in San Francisco, Los Angeles, Chicago, San Diego, Miami, Baltimore, Boston, Cleveland, Las Vegas, San Jose, St. George UT, and Cumberland MD, with additional systems under construction in New York City, Atlanta, and other markets.

The company emphasized that these advancements required no new spectrum, instead using existing FM booster infrastructure to expand service and enable hyper-local content following the FCC's 2025 rule change permitting limited geotargeted programming.

The filing states that MaxxCasting has strengthened FM service in many communities previously located in signal "holes," improving day-to-day listening while enhancing the reliability of Emergency Alert System reception. GBS notes that the technology "provides more service to more people with the same amount of spectrum," a benefit the company says is especially important in a time of increasing spectrum scarcity.

With the FCC now allowing broadcasters to originate short segments of localized programming via boosters, GBS reports growing interest in ZoneCasting for targeted advertising, localized news, weather, sports, and-in markets where permitted-candidate debates.

Advertiser demand appears strong. Citing industry data, the filing notes 39% of advertisers say ZoneCasting would cause them to increase or begin AM/FM radio buys, while 44% report they are "very interested" in using geotargeted FM ads.

GBS also highlights that its technologies are already modernizing FM broadcasting in six of the top ten U.S. radio markets, positioning stations to deliver more relevant, community-focused programming while better leveraging existing spectrum resources.