On 1/3/09, Alex Balashov <[email protected]> wrote: > That would depend on where the number went "back" to. > > Underlying carrier? Pooling? Another level of ITSP resale? > > Number block ownership and routing is assigned. Carriers can't just > pick a number and start providing it. Kind of like IP addresses and BGP. >
I don't know if I would make the comparison to IP and BGP... It's widely known (and demonstrated) that very, very few (if any) upstreams filter and/or verify route advertisements. It's really a mess. Spammers advertised "unused" blocks they find and spam from them. Pakistani Telecom jacks YouTube somewhat-globally with a more specific advertisement of YouTube's IP space. Pilosov/Kapela attack, etc. Totally off topic but I though I'd at least bring it up. -- Kristian Kielhofner http://blog.krisk.org http://www.submityoursip.com http://www.astlinux.org http://www.star2star.com _______________________________________________ --Bandwidth and Colocation Provided by http://www.api-digital.com-- asterisk-biz mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-biz
