if you are Leopard user, use this command in terminal :
dscacheutil -flushcache
if you are Tiger user, use this command in terminal :
lookupd -flushcache
Bonus; if you are Windows user, go to the command prompt [cmd] and use this command :
ipconfig /flushdns
sorry, but i dont know how to clear dns cache in Linux workstation, any idea? if you use bind as your DNS server in Linux you can reload dns cache by command [need root]
rndc reload
hope this usefull 
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6 Responses to How to clear dns cache in OSX
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Ornaments
on 
on 
Owh…jadi gitu yak omz..
Tar deh gw coba di macbook air gw..
Macbook air?
ngga rusak itu macbook kena air?
Bonus buat BlankOn apa?
@milisdad, Blank0n itu linux bukan? kalo linux berarti boleh baca lagi diatas
Sayang sekali postingannya hanya sedikit. Tapi enggak papa deh, yang penting ada yang diposting. Ayo posting info yang lainnya.
@Ade FR, wah maap sekali…. emangnya mau info apaan?