The calls started coming in Sunday night. By the time they were done, Guilford Police believe every land line telephone in the town of 22,000 residents received a call.
The automated call is a female voice claiming to be from Guilford Savings Bank. It prompted those on the other end of the line to enter bank card and PIN numbers, along with their card's expiration date.
"I was confused," Priscilla Conard, of Guilford, said.
She has an account at Guilford Savings Bank and she received one of the calls.
"I had just gotten this debit card and I figured somebody was trying to scam me or get into my account," she said.
So far, police and bank officials aren't aware of anyone who entered their personal information.
"You're surprised that a bank like ours gets hit," said Tim Geelan, Executive Vice President of Guilford Savings Bank. "Bank of America, they're everywhere. But Guilford Savings Bank, you say, 'Oh gosh. We're on their radar too.'"
Guilford police said this appears to be a complex scam that involves hacking into various business telephone lines from across the country. The calls appear to be generated from companies, but the businesses are not involved in the fraud, police said.
The bank is encouraging anyone who offered personal information over the phone to contact them immediately.