dig not returning any results

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http://forums.fedoraforum.org – my fedora 18 install came with bind and bind utils already, when i query for example host -t ns google.com it shows me google nameservers, but when i try dig google.com and also dig for ns or mx i always get the same result no matter what option i give to dig. it always returns the address of my router. why does host works but not dig? am i missing something like modifying something so dig commands can work, or does the dig command only works on centos and rhel , server distros only or what? (HowTos)