Was talking to a client yesterday and our conversation revolved around their mobile phone number, which indicated a South Jersey area code. They are in California. Another client is moving to California and has an NYC area code. Yet another is in Florida and has a North Jersey area code. I'm in NJ and have an NYC area code.
I imagine we're reaching a moment when location will be less discernible via area codes. This is an issue which began developing as people have switched from letter writing (street address/town/zip) to email (ISP provider, which can be anywhere).
The nature of my work allows me to find out a lot of online information easily, if I choose to. I'm not particularly nosy, so I don't. I have, on occasion, when the spirit drives me (I remember one of my jobs, at lunch, listening to people talk about ex-boyfriends or ex-girlfriends they did searches on. Creeped me out a bit, then I went and looked up one that afternoon, so who am I to judge?). To be honest, it's not that hard for anyone who puts their mind to it (or has the money to buy the data).
In some ways, the "anonymization" of life was one of the original draws of the internet. The classic New Yorker cartoon "on the internet, nobody knows you're a dog" was accurate, if not precise, at the time. It's absolutely NOT true today. It is this fact that keeps me working. In a panel discussion, I once pointed out to a college student, who said my company had "sold her data" (we do not, ever, sell data), I pointed out to her that many corporations do sell the data of their site visitors, but good corporations recognize the problems inherent in that behavor, so there are roles in my industry which exist precisely to keep that data safe - or as safe as it can be.
Maintaining a level of anonymity is important for the best parts of the internet to work as they were intended. Anonymity is often important to make meaningful commentary and points (Silence Dogood would approve). The fact the blockchain exists today is, in part, to solve some of these issues (the internet was not meant to be driven by advertising, but the lack of a good payments and anonymity system led to its development as one).
The days of knowing a location based on an area code may be coming to an end. In a lot of ways, that may be a good thing. Hopefully, the days of online anonymity will soon be back, though with some major revisions. It's hard to go back from where we are today. (Personal note - the EU's GPRA and California's CCPA do NOT provide you the protection you think they do, or that politicians have promoted)
Norway 
Photo is from a friend X-country skiing in Tahoe 