Alan Jackson says he's "not on anybody's label" now that he's completed his contractual obligations to Arista Nashville. However, in exploring his business options, he has not ruled out signing another contract with Arista and its parent company, Sony Music. Jackson confirmed his status earlier this week during an interview with CMT.com. He said 34 Number Ones, a greatest his compilation released on Nov. 22, is the final album planned under terms of his most recent contract with Arista. "I'm not on anybody's label," he said. "I'm not saying I won't be on their label. We just haven't really negotiated anything for the future -- and I haven't with anybody, to be honest with you." He added, "I don't know what's gonna happen. We're just kind of seeing what the options are out there." In 1989, Jackson was the first artist signed when Arista launched its country division. Sony Music Nashville is currently headed by Gary Overton, a music industry veteran who managed Jackson in the mid-'90s. "I'm gonna do what I'm gonna do," Jackson said. "I don't have anything against the Sony group. ... Gary is an old friend. We may end up there. I don't know. I just really don't." Martina McBride recently signed to a new label, Republic Nashville, after spending nearly two decades at RCA Records, another imprint operated by Sony Music Nashville.