STAR Jones' husband, Al Reynolds, had better tell strangers who come looking for him late at night to be a little more careful whose buzzers they ring.
A neighbor of Reynolds and Jones who lives on a lower floor in the same ritzy Yorkville building where the couple have a penthouse says a mystery man rang his lobby buzzer Monday at 4 a.m. and asked for Star's better half. "He said, 'I'm looking for Al Reynolds,' " tattled the neighbor, who told the nocturnal visitor that he was calling the wrong apartment number.

"He was a really big black guy in a bucket hat," said the mole, who glimpsed Reynolds' gentleman caller on his TV monitor via the building's closed-circuit cameras.

Jones' spokesman, Brad Zeifman, downplayed the incident. He told us she and Reynolds "have been continuously harassed at all hours of the night after their address was made public, and, fortunately, the two of them were not home on this night."

Reynolds' neighbor says that, during daylight hours, Jones' mustachioed hubby is a regular sight around the building - albeit in very informal dress.

"I know Al. I see him in the elevator all the time - in Spandex," the neighbor said, adding that Jones and Reynolds appear to be together "only when they go to parties. They are always together at night when they go to events. They drive around the neighborhood in a new car - a black 2007 S-Class 550 Mercedes."

But a different source said that last weekend, Reynolds stepped out on the town with some male pals but without Jones. And he's previously been spotted alone at nightclubs on the East End. Last year, he was denied entrance at one Hamptons nightclub after showing up with a gaggle of guys.

Word of Reynolds' mystery caller comes two days after Jones' rep angrily insisted that somebody is out to get the couple by claiming their marriage is finished. The rep also warned that Jones' lawyers have launched an investigation into who's been spreading the splitsville story and said they were closing in on a culprit, whom they intend to take to court.

PG6