My web tool 'What is my City Name' sometimes shows poor location accuracy, anyone know why?

Hey everyone, I run a simple web tool called 'What is my City Name' that helps users quickly identify their current city based on their IP. Lately, I've noticed some users report really inconsistent IP geolocation accuracy, occasionally showing a city several states away. It's frustrating when the data isn't spot-on. Anyone faced this before with their own tools or know common pitfalls to avoid for better accuracy?