resolver cannot resolve "image.bugsm.co.kr"

“Bugs” (https://music.bugs.co.kr/) is one of the largest music streaming website in South Korea.

When I visited the website with the other DNS resolvers, I could see the album images which are serviced at “image.bugsm.co.kr” domain.

I don’t have enough knowlege about network… However, as could resolve the domain, I thought that this might be a problem of resolver.

Summary: could not resolve the domain “image.bugsm.co.kr”, and I don’t know why…

EDNS Compliance Test for bugsm.co.kr


As bugsm.co.kr did not follow the EDNS standards, might stop to resolve the page… I got it! thanks @Withheld !