Howto Say the IPV6 Number

by Bruce Brown | 4 Comments

If you didn’t know, IPv4, the current network layer protocol used on the Internet is due to be replace with a new networking protocol called IPv6. IPv4 is a 32-bit addressing scheme that allows 4,294,967,296 possible unique addresses. IPv6 is a 128-bit addressing scheme that allows much more.


This is the number of possible IPv6 numbers that are possible:


And here is how to say the number.


340- undecillion
282- decillion
366- nonillion
920- octillion
938- septillion
463- sextillion
463- quintillion
374- quadrillion
607- trillion
431- billion
768- million
211- thousand


2^128=340,282,366,920,938,463,463,374,607,431,768,211,456 = 3.4×10^38
50 octillion addresses for each of the 6.5 Billion people on earth
Every atom in the human body could have IPv6 address
Windshield wipers on your car may have and IPv6 address (every device can be “pingable”)

Pros and Cons of IPv6:

Lack of migration plan
Definition of “compliance”? (dod)
Long address (2001:0000:1080:8c88:8:800:200C:417A)
Security issues

No tools to check IPv6 packets, so this exploit has no way to be stopped yet
Windows XP supports IPv6 but the SP2 firewall would not detect rogue data inside ICMPv6 packets



ipv6 for everything
Japan already on top of it
Help countries like China and India



Here are some other interesting numbers:




4 Comments on Howto Say the IPV6 Number

  1. Rob
    December 26, 2007 at 1:12 pm (12 years ago)

    You forgot something. When you did your naming of how big IPv6 was, you forgot billions. IPv6 is ~ 340 undecillion, not 340 duodecillion.

    December 28, 2007 at 12:31 am (12 years ago)

    Fixed it.. thanks. After about a trillion it becomes to big to have any real context for me.. I can barely grasp a trillion but I use the money spent on the Iraq war as my measuring stick.


2Pingbacks & Trackbacks on Howto Say the IPV6 Number

  1. […] Rob Elamb takes a shot at expressing the number of possible IPv6 addresses in words: […]

  2. […] IP addresses (and if you’d like to know how to say it, click here), there would be 50 octillion addresses available for each of the 6.5 billion people on […]

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