nanog mailing list archives
Re: ISP Address Allocation
From: jlewis () lewis org
Date: Sun, 14 Nov 1999 17:08:32 -0500 (EST)
On Fri, 12 Nov 1999, Patrick Evans wrote:
What is the best and most accurate way to determine an ISP's range of addresses? For example, if I wanted to see what AT&T's allocation of IP addresses are, how would I go about doing this in the most timely manner? What about for smaller ISPs?www.arin.net whois.arin.netOr, in the event of this side of the pond, you could have a look at the list of local IRs on www.ripe.net.
These places are useful for finding out who "owns" what block of space, but the original question was more like "how do I found out all the address space an organization 'owns'?" I'm not aware of an easy way to do that other than walking the entire IPv4 space at the appropriate registries. Another possibility is go to a route server, and play around with show ip bgp regex...and look up the resulting networks to see who "owns" them. ---------------------------------------------------------------------- Jon Lewis *jlewis () lewis org*| Spammers will be winnuked or System Administrator | nestea'd...whatever it takes Atlantic Net | to get the job done. _________http://www.lewis.org/~jlewis/pgp for PGP public key__________
Current thread:
- ISP Address Allocation rfuller (Nov 12)
- Re: ISP Address Allocation Tim Kempka (Nov 12)
- Re: ISP Address Allocation Patrick Evans (Nov 12)
- Re: ISP Address Allocation jlewis (Nov 14)
- Re: ISP Address Allocation Patrick Evans (Nov 14)
- Re: ISP Address Allocation Jeff Haas (Nov 15)
- Re: ISP Address Allocation Patrick Evans (Nov 12)
- Re: ISP Address Allocation Tim Kempka (Nov 12)
- <Possible follow-ups>
- Re: ISP Address Allocation Aleksi Suhonen (Nov 20)