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by treysis
2146 days ago
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He didn't say "all", he said "many". And that is factually right. Many ISPs use DSLite/CGNAT and don't hand out public IPv4 addresses to their customers anymore. Yes, some offer the option to change to a public IPv4, some charge extra money for this feature, and some don't offer it at all! E.g. my ISP doesn't hand out public IPv4 and you can't order it, unless you change to a business contract. However, my ISP is doing some weird 1:1-NAT, so while I don't get assigned a public IPv4 to my router, I do get assigned a single IPv4 on the CGNAT router that also translates back to my home network. |
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It's probably a 1:Many NAT, where the external IP you see yourself as coming from, is used by many customers, not just you.
Otherwise there's no upside to deploying the additional overhead and cost of CGN devices for the carrier.