While small cell deployments among the big four carriers in the United States were originally focused in the top 10 markets, Crown Castle says the reach and interest of small cell nodes has broadened to many additional markets. The tower company is now projecting leasing revenue from small cells to increase 35% year over year to about $75 million.

“In addition to the expected acceleration and new leasing activity, our pipeline of contracted small cell nodes to be constructed over the next 18 to 24 months continues to grow, and currently stands at an all-time high of approximately 35,000, which is up 40% from this time last year,” CEO Jay Brown said during an earnings call with analysts, according to a Seeking Alpha transcript of the event.

“We are seeing activity from all four of the operators on small cells,” Brown said. The company is experiencing a sustained year-over-year increase in the number of nodes it activates and the amount of new nodes it’s contracted to build. Some of that increase can be attributed to greater investment among more carriers, but activity is also growing in the number of markets where small cells are being deployed, according to Brown. “The vast majority of the activity will be concentrated in the top 30 markets in the United States,” he said during the earnings call.