Article · Wikipedia archive · Last revised Jul 24, 2026

Provider-aggregatable address space

Provider-aggregatable address space (PA) is a block of IP addresses assigned by a regional Internet registry to an Internet service provider which can be aggregated into a single route advertisement for improved Internet routing efficiency.

Last revised
Jul 24, 2026
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Provider-aggregatable address space (PA) is a block of IP addresses assigned by a regional Internet registry to an Internet service provider which can be aggregated into a single route advertisement for improved Internet routing efficiency.1

Unlike provider-independent address space, the end-user of address blocks within a provider-supplied space cannot reuse the addresses if they change up-stream connectivity providers.

References

References

  1. "What are Provider Aggregatable (PA) addresses and Provider Independent (PI) addresses?". RIPE Network Coordination Centre. RIPE NCC. Retrieved 7 December 2023.