Groups that have such things I can only presume do not do a good job of periodically going through and auditing their IP allocations or, if they do, then they don't do a good enough job of cleaning up all the details.
On Fri, Oct 02, 2020 at 05:44:13PM -0400, Justin Streiner wrote: > I suspect many providers don't have good business processes for reclaiming > IP space that was assigned to customers who have either disconnected or > voluntarily returned the space. > > The provider I started out with in the mid/late 90s bootstrapped itself > with IP space from MCI (now, CenturyLink... I think?) and UUNET (now > Verizon Business), but we handed those blocks back when we started getting > provider-independent space from ARIN. No idea what became of that space > after we stopped announcing it. > > jms > > On Fri, Oct 2, 2020 at 3:38 PM Ryan Wilkins <r...@deadfrog.net> wrote: > > > I have the same thing with a service that was disconnected a couple years > > ago. Four IP blocks of /24 size are still swipped to us and we???re > > announcing them. I don???t put any customers on them and just use them for > > temporary things for fear that some day someone will want them back. > > > > On Oct 2, 2020, at 2:50 PM, Matt Brennan <brenna...@gmail.com> wrote: > > > > > > A service I disconnected more than 2 years ago still has a /24 of their > > space SWIPED to me. Their NOC closed the ticket I opened to remove. Unknown > > if it's actually in use for another customer. > > > > I also had a conversation last week with another ISP (we were > > renegotiating our contract) about this. The order form they sent me had > > multiple /28's we had "given back" years ago still listed. Turns out > > they're still being routed to us as well. > > > > I would bet it happens all over the place. > > > > -Matt > > > > On Fri, Oct 2, 2020 at 2:00 PM Matt Hoppes < > > mattli...@rivervalleyinternet.net> wrote: > > > >> I'm sitting here in the office on a Friday performing some IP > >> maintenance and I see that one of our upstreams is still filtering an IP > >> range we haven't used in years. I dig into it a bit more and it turns > >> out a major carrier still has them SWIPed to us. > >> > >> This got me curious and I dug more into IPs from back in our early days > >> and discovered there are two Tier-1 carriers we no longer do business > >> with that still have large blocks of their own IPs SWIPED and allocated > >> to us. > >> > >> This is really confusing and concerning. I know it's not the > >> end-all-be-all, but I wonder how much IPv4 exhaustion is being caused by > >> this type of IPv4 mis-management, where IPs are still shown as > >> "allocated" to a customer who hasn't used them in years. > >> > >> I've seen this behavior from Frontier and CenturyLink to name just a few. > >> > >> Any thoughts on this? > >> > > > > --- Wayne Bouchard w...@typo.org Network Dude http://www.typo.org/~web/
