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Science & TechFact

The internet ran out of addresses in 2011.

An IPv4 address has 32 bits, so there are about 4.3 billion of them, for over 8 billion people and even more devices. On 3 February 2011 the central registry IANA handed out its last blocks; Europe's RIPE NCC followed in November 2019. Since then many devices share addresses, or they use IPv6 with 2 to the power of 128 addresses.

Useful: Your router probably sits behind a shared address, which is why home servers often need workarounds.

Source: en.wikipedia.org

InformatikInternetNetzwerk

Difficulty:

Question on this card

Roughly how many IPv4 addresses exist?

  1. 4.3 million
  2. 4.3 billion
  3. 4.3 trillion
  4. Infinitely many
Show the answer

Correct: 4.3 billion

32 bits give 2 to the power of 32, just under 4.3 billion combinations.

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