- The 0206 Dialing Code
Although 0206 is also a port code in Canada, it doesn't match with any international code.
In the United States, area code 206 corresponds to the US State of Seattle, the islands of Bainbridge, Mercer, and Vashon, as well as areas of the Seattle Metro area, including Des Moines to Woodway.
- A Nuisance Caller?
This sounds like a phone phishing scam and there is a strong possibility that your number will be used for fraudulent purposes. They are renowned for calling every five minutes.
- The International dialing codes and their uses
All codes were originally only two digits long. Only when the world telephone coverage expanded across the globe in the mid sixties did three digit codes arise. This was purely because of the sheer number of new countries in places such as Africa modernizing to a degree that allowed the construction of telephone networks.
The world was divided up into roughly continental zones, for example the United States and North America was known as zone 1 and Europe was zone 2.