Many times, you want make a DNS change, they tell you it will take 24 hours for that to propagate, but how do you know when it really happens. You can run a ping from your machine, but there’s a better tool.
What’s My DNS does a check of various DNS servers around the world. It’s a great way to see how change propagate. I find that with Digital Ocean, it is basically instantaneous around the world and to Google for sure. Give it a try next time you make a change