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Full Discussion: Subnetting
Special Forums IP Networking Subnetting Post 302993564 by drysdalk on Saturday 11th of March 2017 06:53:42 AM
Old 03-11-2017
Hi,

That's almost certainly not correct, no. Your Internet provider is extremely unlikely to have the whole of 46./8 allocated to them. That'd be over sixteen million usable IPs, and a fairly large chunk of the Internet. In all likelihood the network range is 46.126.40/24, but it could be anything smaller or a bit larger than that.

My advice in understanding this whole thing would be: forget about all this Class A, B, C stuff. The important thing is the netmask. In day-to-day life you'll seldom encounter any external Internet-live IP ranges that are larger than a /24. In private network ranges it's not unusual for /8 or /16 to be seen, certainly.

I think at this point it would also be helpful to explain what it is you're trying to do, and why you think you need a huge chunk of the 46/8 part of the Internet to do it.

Edited to add: also, there's no way you or anyone anywhere can buy a whole Class A ! The IPv4 address space is almost entirely exhausted worldwide at this point. What almost everyone on domestic or small office broadband does is use an internal private network range, like 10.x.x.x or 192.168.x.x, and then use NAT to talk to the outside world on a single IP or far smaller number of live IPs.
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LEARN ABOUT DEBIAN

cwhois

CWHOIS(3)							   whois client 							 CWHOIS(3)

NAME

       CWHOIS - whois client

SYNOPSIS

       cwhois [-a|-F|-L|-m|-M|-r|-S|-R] [-h hostname] [-s source[[,source]...]] [-T type[[,type]...]] [-i attr[[,attr]...]] keys

       cwhois [-t type]

       cwhois [-v type]

DESCRIPTION

       cwhois Simple whois client that gives you back output, compatiable with RIPE DB v2, if you'll ask it to.

OPTIONS

       -a     search all databases

       -F     fast raw output

       -L     find all Less specific matches

       -m     find first level more specific matches

       -M     find all More specific matches

       -r     turn off recursive lookups

       -S     tell server to leave out 'syntactic sugar'

       -R     force to show local copy of the domain object even if it contains referral

       -h hostname
	      search alternate server

       -s source[[,source]...]
	      search databases with source 'source'

       -T type[[,type]...]
	      only look for objects of type 'type'

       -i attr[[,attr]...]
	      do an inverse lookup for specified attributes

       -t type
	      requests template for object of type 'type'

       -v type
	      requests verbose template for object of type 'type'

HINT

       Please note that most of these flags are NOT understood by non RIPE whois servers!

SEE ALSO

       Website <http://www.ripe.net/tools/>

AUTHOR

       CWHOIS was written by Timur Bakeyev <timur@ripe.net>.

       This manual page was written by Jan Wagner <waja@cyconet.org>, for the Debian project (but may be used by others).

1.10								    2006-11-03								 CWHOIS(3)
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