My iPhone correctly says “Ottawa, Ontario, Canada”, while Google’s library doesn’t return the city?

There was a time when a phone number's area code and exchange would indicate a pretty constrained geographic area -- for a land-line. I don't think it's possible to do this kind of "find the geography from a phone number alone" lookup accurately in the modern environment. Whatever API Apple provided got your example number right, sure. But how will you know when it gets one wrong? How can you know how often it gets it wrong? What does it really mean to assign a place to a cell number?

My own phone number consistently gets pegged by these things as "belonging to" a specific town several miles away from where I live, probably because the exchange part of my number is one that used to be associated with that town. But that observation doesn't produce any kind of useful information today, it's just misleading.