Tamara Abrams has been answering the phone a lot lately.
"I received 47 calls from Thursday to Sunday," the Arlington, Va., native said.
But these are unwanted calls, from a phone number with a Wyoming area code, from an unknown person.
"I got calls at 1:15 a.m., 3:30 a.m. and at 6 a.m. when I got up," she said.
When she answers the phone, no one is on the line. And when she calls the number back, a recording indicates that the call cannot be completed.
Abrams blogged about the problem on huffingtonpost.com and quickly found out that she's not alone in receiving these annoying phone calls. Several of her neighbors in Arlington also say they've been getting calls at all hours from this same Wyoming phone number.
Through their own research, residents say they have traced the problem to a carrier called Level Three Communications. But they can't seem to get someone on the other end of the line.
"We can't reach Verizon," said Brian Clark, who also lives in Arlington. "I called Level Three. I was on the phone for one and a half hours before it disconnected."
The recipients of the unwanted calls want their phone companies, the Federal Communications Commission, police or someone to do something about it.
"I don't know if it's a scam," said Martha Herrmann. "I was told it was a telemarketer. What people in their right mind could sell anything to anyone this way?"
The calls seem to have tapered off, but Abrams said she's not letting the culprits off the hook, if she can figure who they are.
"The worst thing to happen," she said, "would be to put your hands up and say, 'Oh well, it stopped, it's OK.' "