UNDECILLION!

The Shortcut
2 min readJan 29, 2023

Do you know what that is?

That’s a whole lot of zeros.

As I was going over my notes for a CCNA Exam and I came across this incredible word - Undecillion — That is a 1 followed by 36 zeros! That is a colossal number!

The reason I came across that number is that in 2020 the internet ran out of IPv4 addresses. There were a total of 4 billion IPv4 addresses available for use on the internet and because we ran out a new technology was invented to replace it. This is IPv6.

IPv6 has a total of 340 undecillion unique addresses available for use. So yes… even with the advent of the internet of things (IoT) and all of the internet-connected devices we can ever imagine we will not run out of IPv6 addresses ever.

In case you were wondering what comes before an undecillion, here’s a chart for you:

chart of IPv6 and IPv4 address capacity

So there you go! You learn something new every day!

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