Same exact thing is happening to me. All numbers are between 555-0100 and 555-0199 but with different area codes. They call me twice a day from all over the place

Received three calls in 5 hours today from numbers supposedly originating in British Columbia (this one), Oregon (calller ID: Unknown Name) and Pennsylvania.  Although all area codes are different, the phone numbers are all 555-01XX.   White Pages lists all three as landlines belonging to "Telecom Routing Administration."

Same is happening to me. The fourth time they called, i answered and she said she was with insurance solutions and she would call me back with the lowest price. She spoke fast songs none of it made sense. When i said i was on the do not call list she hung up. I'm sure they will call again.