Arizona authorities received nearly 18,000 tips since Nancy Guthrie was allegedly kidnapped from her home

Nearly 18,000 tips have flooded in about the assumed kidnapping of Savannah Guthrie’s 84-year-old mom, Nancy — including 4,000 calls within 24 hours of startling images of the suspect at her doorstep.

The tips to the Pima County Sheriff’s Department come as officials continue a huge search for the missing mom 12 days after she went missing, without yet narrowing down on a suspect.

The avalanche of tips proves that “this is the exact antithesis of a cold case,” retired FBI supervisory special agent James Gagliano told “Fox & Friends” Thursday morning.

“Public interest out here in the Tucson area is through the roof,” he said.

While “most” of the tips “are going to turn out to be dead ends, some could also be key in “advancing the investigation,” he said.

The “Today” show host’s mom is believed to have been abducted from her Tucson home during the early hours of Feb. 1, with a series of ransom notes then sent demanding millions in bitcoin.

Investigators released surveillance footage on Tuesday showing the masked suspect holding a gun on Guthrie’s front porch the morning she vanished.

Along with the tips, police discovered a black glove a mile and a half from Guthrie’s house that is similar to the ones worn by the man in the surveillance, with tests yet to confirm if it is connected.