It is pretty inaccurate in my experience. When I was house hunting, I learned to simply put each address in the ISP website.
Even now, I put my zip code in, and it says 940Mbps fiber available, with an asterisk that says it may not be available everywhere. Except I know in my zip code, 95% of the houses do not have fiber, only the developments built in the last decade or so.
And as a shortcut, any neighborhood with buried utilities developed between 1980 to ~2010 will likely not have fiber.
Even the ISP positively indicating service does not necessarily mean you have service; tech can roll out and say you need to spend tens of thousands of dollars to make it from the premises to the neighborhood node.
Highly inaccurate. Depends on "speeds up to ..." which means that you almost never actually see that speed. In fact, you probably never get within 10% of that speed.
Even now, I put my zip code in, and it says 940Mbps fiber available, with an asterisk that says it may not be available everywhere. Except I know in my zip code, 95% of the houses do not have fiber, only the developments built in the last decade or so.
And as a shortcut, any neighborhood with buried utilities developed between 1980 to ~2010 will likely not have fiber.