I Keep getting calls from this number also. The number is coming from Washington State. The city of Seattle also uses this number. The areas below also use the 425 code. All are in Washington State.
BELLEVUE
BOTHELL
CASCADE-FAIRWOOD
COTTAGE LAKE
EDMONDS
EVERETT
INGLEWOOD-FINN HILL
KIRKLAND
LYNNWOOD
MOUNTLAKE TERRACE
NORTH CREEK
PAINE FIELD-LAKE STICKNEY
PICNIC POINT-NORTH LYNNWOOD
REDMOND
RENTON
SAMMAMISH