A Visual History of Internet (IPv4) Address Allocations
An animated slideshow presentation of the history of IPv4, using a Sankey diagram to visualize the flow of IPv4 address allocations since inception in 1977, through various address management organizations and policies.
Center the viewer below and use the navigation above the graph to advance through the presentation or autoplay.
Legend
- Legacy: Blocks of addresses allocated before the creation of the RIRs.
- Legacy Admin.: Legacy blocks that were reallocated to RIRs.
- IANA: Internet Assigned Numbers Authority.
- US DoD: United States Department of Defense.
- RIPE NCC: RIR for Europe, West Asia, and the former USSR.
- AFRINIC: RIR for Africa.
- ARIN: RIR for Canada, the United States, and many Caribbean and North Atlantic islands.
- APNIC: RIR for the Asia-Pacific region.
- LACNIC: RIR for Latin America and the Caribbean.
- Multicast: A protocol that addresses a transmission to a group of destination computers.
- Reserved: Reserved for special purposes.
×
![]()
Funding support
