I think you may be right about the age of properties and their associated telecom connections.
The house I live in was built early 20th century bu, until I moved there 20 years ago wasn't wired up for a phone. It was quite common not to have a phone then. I had phone lines installed. I get broadband.
A house nearby of a similar vintage to mine but which has a very old phone system - it is only recently they have had plug in rather than the old wired in phones - cannot have broadband even though they are physically slightly closer to the exchange.
Have a look on click here There may be some info there.