ISP Address Allocation
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? Thanks! Ron Fuller, CCDP, CCNP-ATM, CCNP-Security, MCNE, MCP 3X Corporation rfuller@3x.com
At 02:38 PM 11/12/99 -0500, you 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?
Thanks! Ron Fuller, CCDP, CCNP-ATM, CCNP-Security, MCNE, MCP 3X Corporation rfuller@3x.com
www.arin.net or whois.arin.net Tim Kempka ___________________________ Tim Kempka Network Engineering Manager FlashNet Communications Phone: 817-759-4844
On Fri, 12 Nov 1999, Tim Kempka 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.net
Or, in the event of this side of the pond, you could have a look at the list of local IRs on www.ripe.net. -- Patrick Evans - Sysadmin, bran addict and couch potato pre at pre dot org www.pre.org/pre
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.net
Or, 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__________
On Sun, 14 Nov 1999 jlewis@lewis.org wrote:
Or, 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.
RIPE's site has a good stab at that. The local IR page lists every IR, alphabetically, by country, and lists all allocations for each one. I know of no equivalent outside RIPE, but it works well enough on this side of the Atlantic... -- Patrick Evans - Sysadmin, bran addict and couch potato pre at pre dot org www.pre.org/pre
On Sun, Nov 14, 1999 at 05:08:32PM -0500, jlewis@lewis.org wrote:
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.
For registries using the Merit IRR daemon, one can get the list of all netblocks an AS has registered using the backend interface documented in Appendix B of the IRRd manual. The manual is at http://www.merit.edu/radb/irrd/irrd.pdf For example, Merit AS 237 would be $ whois -h whois.radb.net \!gas237
Jon Lewis *jlewis@lewis.org*| Spammers will be winnuked or
-- Jeffrey Haas - Merit RSng project - jeffhaas@merit.edu
participants (5)
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Jeff Haas -
jlewis＠lewis.org -
Patrick Evans -
rfuller＠3x.com -
Tim Kempka