Re: The assignment of numerical addresses for Domain Names ??
On Thu, Aug 07, 2008 at 21:54:31 -0430, Patrick O'Callaghan [EMAIL PROTECTED] wrote: On Thu, 2008-08-07 at 21:20 -0400, William Case wrote: When ARIN (American Registry for Internet Numbers or one of its clients, or any other IANA RIR) assigns a /8, or /16 number and registers a new domain name is there any rules, policy or usual practice in the assignment that gives a hint to the nature of the entity that has received a certain address? At what time the prefix could be used to tell the size of the allocation. The prefix determined whether the allocation was a class A, B or C (which correspond to /8, 16 and /24 respectively). Attempts were made to keep similar prefixes in the same area to keep routing table sizes down. -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
Re: The assignment of numerical addresses for Domain Names ??
Hi Chris; On Fri, 2008-08-08 at 00:24 -0400, Chris Tyler wrote: Ed Greshko wrote: William Case wrote: http://xkcd.com/195/ provides an interesting perspective :-) -Chris Actually, Chris, it does provide an interesting perspective. I wonder how accurate it is. It explains far more than any written rationalization I have come across. -- Regards Bill; Fedora 9, Gnome 2.22.3 Evo.2.22.3.1, Emacs 22.2.1 -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
Re: The assignment of numerical addresses for Domain Names ??
Chris Tyler wrote: http://xkcd.com/195/ provides an interesting perspective :-) Yes, although it's quickly becoming outdated. For example, in an announcement in February, ICANN mentioned that IANA allocated more than one /8 (16m IPv4 addresses) per month in 2007 and the rate of allocation is not expected to slow in 2008, so the green areas are shrinking fast. http://www.icann.org/en/announcements/announcement-2-10feb08.htm Björn Persson signature.asc Description: This is a digitally signed message part. -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
Re: The assignment of numerical addresses for Domain Names ??
William Case wrote: Hi; My question is quite narrow. I am not looking for generalized explanations of IPv4. When ARIN (American Registry for Internet Numbers or one of its clients, or any other IANA RIR) assigns a /8, or /16 number and registers a new domain name is there any rules, policy or usual practice in the assignment that gives a hint to the nature of the entity that has received a certain address? E.g. If I see 64.71.255.198, could I reasonably say That's a name server, or, that's a Rogers Cable Inc. address or glean any other information about the organization, company or purpose? Or are all such address assignments simply arbitrary? If there is such a rule, policy or usual practice, do you know where I could find it and/or see a table of such assignments. I have done my google due diligence. Every site, official and otherwise, remains silent on the question. That usually portends a negative; there is no such policy -- but ya' never know. Use whois to glean information... [EMAIL PROTECTED] winXPPro-EN]$ whois 64.71.255.198 [Querying whois.arin.net] [whois.arin.net] OrgName:Rogers Cable Communications Inc. OrgID: RCC-104 Address:One Mount Pleasant City: Toronto StateProv: ON PostalCode: M4Y-2Y5 Country:CA NetRange: 64.71.240.0 - 64.71.255.255 CIDR: 64.71.240.0/20 NetName:ROGERS-CAB-104 NetHandle: NET-64-71-240-0-1 Parent: NET-64-0-0-0-0 NetType:Direct Assignment NameServer: NS2.YM.RNC.NET.CABLE.ROGERS.COM NameServer: NS2.WLFDLE.RNC.NET.CABLE.ROGERS.COM NameServer: NS3.YM.RNC.NET.CABLE.ROGERS.COM NameServer: NS3.WLFDLE.RNC.NET.CABLE.ROGERS.COM Comment: RegDate:2004-03-08 Updated:2006-12-05 OrgTechHandle: IPMAN-ARIN OrgTechName: IP MANAGE OrgTechPhone: +1-416-935-4729 OrgTechEmail: [EMAIL PROTECTED] -- Quit worrying about your health. It'll go away. -- Robert Orben -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
Re: The assignment of numerical addresses for Domain Names ??
William Case wrote: Yes. I have used whois or jwhois. I guess just by looking at 64.71.255.198 I can't tell much, but have to use whois to find out more. I was wondering if say, all Broadcast companies are grouped as 64.70.xxx.xxx to 64.90.xxx.xxx or some such scheme -- but I guess not. Not much point to it, on thinking about it. You are correct. The IP address alone won't tell you much. They may be some rhyme or reason as to how they are doled out...but the rhyme/reason is not consistent over all of the world. And the rhyme/reason is most likely predicated on the physical. -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
Re: The assignment of numerical addresses for Domain Names ??
Hi Ed; Just an off topic comment. On Fri, 2008-08-08 at 10:43 +0800, Ed Greshko wrote: William Case wrote: Yes. I have used whois or jwhois. I guess just by looking at 64.71.255.198 I can't tell much, but have to use whois to find out more. I was wondering if say, all Broadcast companies are grouped as 64.70.xxx.xxx to 64.90.xxx.xxx or some such scheme -- but I guess not. Not much point to it, on thinking about it. You are correct. The IP address alone won't tell you much. They may be some rhyme or reason as to how they are doled out...but the rhyme/reason is not consistent over all of the world. And the rhyme/reason is most likely predicated on the physical. When I was a kid here in Ontario, you could tell what part of the province a car was from just by the first couple of numbers on the license plate, but that time is long gone. -- Regards Bill; Fedora 9, Gnome 2.22.3 Evo.2.22.3.1, Emacs 22.2.1 -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
Re: The assignment of numerical addresses for Domain Names ??
Original Message Subject: Re: The assignment of numerical addresses for Domain Names ?? From: William Case [EMAIL PROTECTED] To: For users of Fedora fedora-list@redhat.com Date: Thursday, August 07, 2008 9:48:15 PM Hi Patrick; On Thu, 2008-08-07 at 21:54 -0430, Patrick O'Callaghan wrote: On Thu, 2008-08-07 at 21:20 -0400, William Case wrote: [snip] Some policy is documented at http://www.arin.net/policy/nrpm.html for example, but in general you can't look at a random IP number and tell what it stands for without further investigation. Use whois to find out about specific assigned numbers. Yes, I gather the assignments, given history and everything else, are too random to make them meaningful in themselves. But thanks for the policy URL above. I had looked at the ARIN site but hadn't gone through the policy page. There is no answer to my immediate question, but several incidental questions that I had put aside are answered there. IANA assigns /8's to regional authorities (such as ARIN). Each authority then has their own policy regarding assignments. From my experience, ARIN seems to simply uses the next available space out of their assignments. So if 10 companies requested IP blocks tomorrow, they would likely all receive IPs in the same /8. So basically, first come, first serve there is no order other than perhaps a bit of chronology if you know when a /8 started to be used. ARIN probably has more IPs than any other regional authority, so they tend to be more liberal with their assignments (they give out larger blocks). Typically they give out enough IPs to last a requesting organization a year or two of expansion. This keeps the number of routes down which lessens BGP routing overhead (RAM and CPU usage). Other authorities are more stingy. If you already have a block of IPs from ARIN and request one a year or two later, more than likely you'll get a block from a different /8. I'm sure ARIN audits IP usage occasionally, and probably tries to reclaim unused IP space, but they aren't very aggressive at it, and I'm sure a large portion of the IPs they've assigned go unused. --Blake -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
Re: The assignment of numerical addresses for Domain Names ??
Ed Greshko wrote: William Case wrote: Yes. I have used whois or jwhois. I guess just by looking at 64.71.255.198 I can't tell much, but have to use whois to find out more. I was wondering if say, all Broadcast companies are grouped as 64.70.xxx.xxx to 64.90.xxx.xxx or some such scheme -- but I guess not. Not much point to it, on thinking about it. You are correct. The IP address alone won't tell you much. They may be some rhyme or reason as to how they are doled out...but the rhyme/reason is not consistent over all of the world. And the rhyme/reason is most likely predicated on the physical. http://xkcd.com/195/ provides an interesting perspective :-) -Chris -- fedora-list mailing list fedora-list@redhat.com To unsubscribe: https://www.redhat.com/mailman/listinfo/fedora-list
