Whenever i got to any of the nexon sites (maplestory, mabinogi, poptag and even just nexon.net) i always get connection timed out

i tried going on those sites on my laptop and they worked!
but theyre just not working on my desktop, which is where i play maplestory
ive cleared cookies, cache, tried clearing DNS cache but an error saying Unable to Access DNS Revolver Cache, did ipconfig / release + renew and still didnt work

It was working just around 12 hours ago, but will no longer work
Any help?