Home · BGP Expert Test · What is BGP? · BGP Vendors · Links · Archives · Books · My New BGP Book

Total number of IPv4 addresses:

2^32:             4294.97 M
Class D+E:         536.87 M -
Nets 0 and 127:     33.55 M -
RFC 1918:           17.89 M -
                  ---------
Usable:           3706.65 M

Available in IANA global pool:              0.00 M  (0 /8 blocks)

/8s with legacy status:                  1543.50 M  (92 /8 blocks)

  Of which, in use:                      1536.16 M  (91.56 /8 blocks)

  Unused:                                   7.34 M  (0.44 /8 blocks)

/8s delegated to RIRs:                   2164.26 M  (129 /8 blocks)

  Of which, in use:                      2145.33 M  (127.87 /8 blocks)

  Unused:                                  18.93 M  (1.13 /8 blocks)

Total used:                              3681.49 M  (219.43 /8 blocks)

Total unused:                              25.16 M  (1.50 /8 blocks)

M = million. Some RIPE NCC address space has EU as its country, meaning that the address space is used in more than one country. Small amounts of address space are given out by RIRs to entities in countries that aren't normally served by that RIR.

Note that the figures above just show new allocations and assingments during the specified period that's currently still assigned/allocated. Returned address space doesn't show up at all.

Comments or questions? Email me.

Last RIR data import: 08 Jan 2024 14:00:45 local time.