Only dns service cf

Hello all. Thanks for dns service.

I only use Cloudflare’s DNS service.
As you can see from this address, some of them do not work.
( )
So there are red ones, those with high response time value. Why isn’t it all green. Cloudflare seems to have pop points almost everywhere in the world. But why don’t some of me work either? I didn’t see a warning that it would only work in half the world before I used this service. Thank you in advance for any information. respects.

I guess these posts will bring some clarification about how things work

@MarkMeyer thanks for reply.

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