ReView: IP Address Auditing Without the Spreadsheets
Discover inefficiencies. Reclaim address space. Optimize for what’s next.
ReView is a free IP address audit tool developed for IPv4.Global by our ProVision team. It gives service providers, enterprises, and network teams an accurate, actionable snapshot of IP utilization, without the overhead of a full IPAM deployment or complex onboarding.
Whether you’re planning renumbering, preparing for an address sale, or untangling legacy network sprawl, ReView brings structure and insight to your IPv4 assets.
Why ReView Exists
ReView was created to fix a growing problem: most organizations don’t have a clear picture of how their IP address space is actually being used. Between inherited address blocks from mergers, patchwork subnetting, multiple IPAM systems, and inconsistent recordkeeping, it’s easy to lose visibility. That lack of clarity leads to bloated infrastructure, inefficient routing, compliance risks, and, perhaps most critically, lost revenue opportunities from underutilized IPv4 assets. ReView bridges this gap by offering a fast, secure, and no-cost way to audit your address space and uncover what’s really happening across your network.
Over time, even well-managed networks accumulate inefficiencies:
- M&A activity adds undocumented or overlapping space
- Team changes leave records incomplete
- Demand fluctuates, leaving address blocks underutilized
- Legacy tooling creates fragmented tracking and patchwork provisioning
ReView helps surface these issues so you can clean up, consolidate, and plan smarter, without committing to a full platform transition.
What ReView Does
ReView performs a deep scan of your environment, combining routing data, config files, SNMP, and more to generate a comprehensive, visual IP utilization report. It flags inefficient address use, potential renumbering candidates, and blocks that can be consolidated or monetized. You get a customized snapshot of your IP inventory, including:
- Visualized utilization maps (including Hilbert Curves)
- Detection of underused or idle blocks
- Suggestions for subnet aggregation
- Visibility into cloud IP allocations
- Optionally scoped discovery with your own device lists or file uploads
All of this happens locally, ReView is not a cloud-based tool, so your sensitive data stays in your control.
The result: a clear, visual map of your address space with highlights on overprovisioned, unused, or inefficient blocks, including recommendations for renumbering and consolidation.
An IP Audit Tool Built for Real Environments
ReView isn’t just a scanner, it’s designed for modern, mixed-network environments. Whether you’re running routers, switches, firewalls, DHCP, DNS servers, or managing cloud IP space across AWS, Azure, or VMware, ReView integrates seamlessly with your reality. It works with:
- Legacy equipment and modern stacks
- Hybrid environments with public/private address space
- Config files and manual records where APIs don’t exist
- Security controls that let you scope access and protect sensitive data
You can run ReView entirely offline or allow limited read-only access for deeper analysis, depending on your comfort level and compliance needs.
Whether you’re dealing with internal audits or prepping for IPv4 asset divestment, ReView fits into your workflow, not the other way around.
What You’ll Get Out of It
The benefits of an IP address audit with ReView go far beyond clean reports. Organizations use ReView to:
- Improve network hygiene: Identify misconfigurations, reclaim lost space, and eliminate conflict risks.
- Enhance security posture: Detect unauthorized devices, unassigned space, or gaps in access controls.
- Streamline troubleshooting: Get an accurate baseline of your address space to diagnose issues faster.
- Ensure compliance: Validate address use against internal policies or external requirements.
- Unlock hidden value: Spot unused or underleveraged IPv4 blocks that could be sold or reassigned.
In short, ReView gives you clarity, and the data needed to act with confidence.
IP Address Monetization Opportunities Built In
IPv4 addresses aren’t just technical assets—they’re financial ones. ReView helps you identify hidden address blocks within your network that may no longer be needed or can be aggregated and sold. With continued global demand for IPv4 and limited availability, organizations are turning unused space into six-figure windfalls. ReView doesn’t just show you what’s inefficient—it helps you find what’s valuable.
And since IPv4.Global is the market leader in IPv4 brokerage, we make the next step seamless. Our team can assist you in validating, listing, and securely selling unneeded space with confidence.
Download and Get Started
ReView is free to use. Just submit your name, company, and email, and you’ll receive a download link for your OS of choice (Windows, macOS, or Linux). Run the app locally and follow the in-app prompts to begin your scan.