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No, not really. If a new organization needs a large block of ip addresses, they just use IPv6. The biggest reason IPv4 persists is because deploying IPv6 can be

No, not really. If a new organization needs a large block of ip addresses, they just use IPv6. The biggest reason IPv4 persists is because deploying IPv6 can be very expensive for legacy users: new equipment, retraining, hiring. For a large organization, planning and executing such a deployment can take years. There are a lot of fresh new telecom providers in India who do not have that kind of baggage, so they chose to deploy IPv6 networks from the start for their cellular internet. You'll notice that if you're on a cellular network, even in the U.S., you will have an IPv6 address. If "the market" ever tries to price gouge for IPv4 addresses to the point where deploying IPv6 becomes the cheaper option, then organizations will just use IPv6 instead.

jlokier 6y ago
> You'll notice that if you're on a cellular network, even in the U.S., you will have an IPv6 address. Just a data point. I'm on a cellular network in the UK for both my phone and my phone network (via 4G router). My phone get an IPv6 address only, no IPv4. But my home network gets an IPv4 address only, no IPv6. I can't obtain IPv6 on the home network even though it's the same cellular service (down to the same kind of SIM and same contract) as the phone.
- ancarda 6y ago
  >I'm on a cellular network in the UK >My phone get an IPv6 address only, no IPv4 Please tell me which network so I can immediately switch. Three unfortunately still don't use IPv6, and I'd prefer if my phone were IPv6-only than IPv4-only since everything else in my life is IPv6 capable -- all my servers, my home Internet, my email provider, etc... EDIT: So it seems some people have gotten IPv6 addresses from Three last year - e.g. https://twitter.com/Mythic_Beasts/status/1195292901191892992 https://twitter.com/Mythic_Beasts/status/1195292901191892992 - so perhaps I just need to wait for Three to enable it for everyone? Not going to wait forever though...
  - jlokier 6y ago
    I'm using Three. The phone Settings > About > Status shows an IPv6 and no IPv4. However it's not really IPv6-only. It is able to make IPv4 connections, which rather than going over the IPv6 route, are instead tunnelled to the network separately via the modem and the network applies CGNAT and assigned an ephemeral source IPv4. I've described some of the NAT behaviour here: https://news.ycombinator.com/item?id=25399780 https://news.ycombinator.com/item?id=25399780 I also I also use Three for my 4G+Wifi home router. That doesn't get an IPv4 at the moment, just an IPv6. None of my home devices can make IPv6 connections over the LAN to my internet services. They resolve ok, but then have no route. Same applies when using my phone as a Wifi hotspot. The hotspot is IPv4 only, even though the phone itself has an IPv6 uplink. Now I know it's an experimental partial rollout by Three, I wonder if I'd see the opposite if I swapped the two SIMs.
    - ancarda 6y ago
      Huh, I get an RFC 1918 address (10.122.129.53) when I look in the settings. No IPv6 support though :(
topranks 6y ago
You need v4 as well in the world today. Lots of users still have no v6, if your business wants to do business with them you need some v4.

jlokier 6y ago

> You'll notice that if you're on a cellular network, even in the U.S., you will have an IPv6 address. Just a data point. I'm on a cellular network in the UK for both my phone and my phone network (via 4G router). My phone get an IPv6 address only, no IPv4. But my home network gets an IPv4 address only, no IPv6. I can't obtain IPv6 on the home network even though it's the same cellular service (down to the same kind of SIM and same contract) as the phone.

ancarda 6y ago
>I'm on a cellular network in the UK >My phone get an IPv6 address only, no IPv4 Please tell me which network so I can immediately switch. Three unfortunately still don't use IPv6, and I'd prefer if my phone were IPv6-only than IPv4-only since everything else in my life is IPv6 capable -- all my servers, my home Internet, my email provider, etc... EDIT: So it seems some people have gotten IPv6 addresses from Three last year - e.g. https://twitter.com/Mythic_Beasts/status/1195292901191892992 https://twitter.com/Mythic_Beasts/status/1195292901191892992 - so perhaps I just need to wait for Three to enable it for everyone? Not going to wait forever though...
- jlokier 6y ago
  I'm using Three. The phone Settings > About > Status shows an IPv6 and no IPv4. However it's not really IPv6-only. It is able to make IPv4 connections, which rather than going over the IPv6 route, are instead tunnelled to the network separately via the modem and the network applies CGNAT and assigned an ephemeral source IPv4. I've described some of the NAT behaviour here: https://news.ycombinator.com/item?id=25399780 https://news.ycombinator.com/item?id=25399780 I also I also use Three for my 4G+Wifi home router. That doesn't get an IPv4 at the moment, just an IPv6. None of my home devices can make IPv6 connections over the LAN to my internet services. They resolve ok, but then have no route. Same applies when using my phone as a Wifi hotspot. The hotspot is IPv4 only, even though the phone itself has an IPv6 uplink. Now I know it's an experimental partial rollout by Three, I wonder if I'd see the opposite if I swapped the two SIMs.
  - ancarda 6y ago
    Huh, I get an RFC 1918 address (10.122.129.53) when I look in the settings. No IPv6 support though :(

topranks 6y ago

You need v4 as well in the world today. Lots of users still have no v6, if your business wants to do business with them you need some v4.