Perhaps you’ll be able to help. Why do ISPs, including yours, not provide a map of service? Almost every time it is this “check if you have service” API. Every time I have moved I have wanted to look for areas with support under various ISPs and each time it’s an annoying process of sending each address to this API, dealing with rate limits, anti-fraud etc.
One time I contacted the business contact with a bunch of addresses and that was useful but the round trip is so slow I was better off just querying.
We actually used to maintain coverage maps, but after expanding through several huge providers such as Cityfibre and Openreach it became silly to maintain.
Certainly in UK that could be also be quite a risky thing to do, as it could expose build strategies to competitors. That said, we expose an API to Better Internet Dashboard so they can do map based coverage exploration.
One time I contacted the business contact with a bunch of addresses and that was useful but the round trip is so slow I was better off just querying.