Customers can avoid losing service by adding cable or satellite service or taking other actions. Mediacom did not disclose how many new customers the 8% figure represents, and a company representative declined to comment.
The figure covers additions during the first quarter, with a bump presumably coming around February, when the transition was initially scheduled and later delayed.
Now in the run-up until June, "we expect to see more incremental positive results from the transition," according to John Pascarelli, executive vice president of operations.
Pascarelli attributed the new additions to a targeted direct mail campaign and special promotional offers. Mediacom is the seventh-largest cable operator, with 1.3 million customers.
As of May 1, 3.5 million -- or 3.1% -- of U.S. homes remain unprepared for the switchover, Nielsen figures show.
Pascarelli made his comments on a conference call to announce results for the first quarter, where revenues were up 7% to $358 million.