Just wanted to add, BNC cost money to use, and they often running from a linux computer, i dont belive any irc-network will give you one, but some network let you mask your hostmask, and they often tell you that on the www page for that network, or in the motd that the server send to you. "/motd" in mirc (without the ")
Not entirely true. Some bnc's are free for the users (Google "trekweb bnc" and "freebnc" (they use znc) I use them for two different networks). Very very few networks host bnc's on their servers for users to use. (I use one for a specific network).
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You can look into doing "rDNS" some people do it. I don't think home ISPs would do it. How you do it, I have no clue.
