IP Address Management (IPAM)
IPAM is the discipline of knowing which addresses you hold, where each one is assigned, and how much headroom is left. Once you manage more than a couple of blocks, spreadsheets stop being a source of truth and start being a liability.
This section covers planning, tooling, and the registry-facing side of address management that most IPAM guides skip.
Scope, responsibilities, and when a tool becomes necessary.
Hierarchical allocation, headroom, and aggregation.
Naming, ownership, review cadence, and audit trails.
Feature matrix across open-source and commercial IPAM.
What you get and what you take on by self-hosting.
Install, model your space, and load existing prefixes.
Install, import subnets, and set up scanning.
Keep registry objects consistent with reality.
Track address space you do not own.
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