How many IPv4 and IPv6addresses are there?

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  • Nex
    Lv 7
    8 years ago
    Favorite Answer

    IPv4 (256^4) = 4,294,967,296 possible addresses (4 billion, 294 million, 967 thousand, 296)

    IPv6 (65536^8) = 340,282,366,920,938,463,463,374,607,431, 768,211,456 (or roughly 3.4 x 10^38)

    (340 undecillion, 282 decilion, 366 nonillion, 920 octillion, 938 septillion, 463 sextillion, 463 quintillion, 374 quadrillion, 607 trillion, 431 billion, 768 million, 211 thousand, 456)

  • 8 years ago

    IPv4 uses 32-bit addresses and allows for only 2^32, or 4,294,967,296 unique addresses

    IPv6 uses 128-bit addresses, allowing for 2^128, or approximately 3.4×10^38 addresses

    However .. not all addresses are available for general use. Some are reserved for broadcast, multicast and other purposes, while some are used for private address spaces and may thus be reused by different organizations without conflict. So the answer to "how many are there?" is not the same as how many are available.

  • 8 years ago

    IPv4 provides about 4.3 billion addresses

    IPv6 can support about roughly 340,000,000,000,000,000,000,000,000,000,000,000,000 addresses

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