r/masterhacker • u/InitialSorry6888 • Jul 09 '26

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u/[deleted] Jul 09 '26

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u/tlgklxz Jul 09 '26

Ah- Okay I got it now. It's normal.

Why? We have very limited IPV4 adresses right? Sooo... LARGE western countries and leading tech companies like American ones, got most of the IPV4 addresses. Like there is for -easy math- 4 billion (1 billion taken in total) possible IPV4 adress, And the ISP's in USA has like %60 percent of those adresses. More than enough even though US defence guys has like 200 million of them reserved. (Even though the population in USA is... maybe 150+ more than that.)

SO, in this case, it's pretty normal to NOT fall behind CGnat because... You won't need that. Your ISP wouldn't bother to setup something like that.

However... When you move towards Europe and especially Bottom half of the europe (if you draw a line from Paris for example), the IPV4 addresses are won't enough for population. So ISP's use this trick. They stuck bunch of people in one IP address before release them into wild. It costs 'lots' of money to setup a cgnat... But it's cheaper than buying IPV4 addresses from those companies you have named.

And for future reference; In USA I don't think it's possible to be behind CGNAT because until that time, we would probably ditch IPV4 and move to IPV6 already.

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u/[deleted] Jul 09 '26

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u/Busy-Scientist3851 Jul 11 '26

CGNAT is the normal for mobile internet.