IP Range Lookup Tool — CIDR Block Analysis
IP range lookup tool — CIDR boundaries, host count, and usable range
How to Use This Tool
- Enter a CIDR block (e.g. 10.0.0.0/24).
- Click Analyze to compute network, broadcast, and host range.
- Review first IP, last IP, and total address count.
- Copy values into runbooks or ticket comments.
About This Tool
An ip range lookup tool expands CIDR notation into network boundaries — first address, last usable host, broadcast, and total count — without manual subnet math.
Use this ip range lookup when documenting firewall objects, summarizing logs, or verifying cloud VPC allocations. For start/end IP spans, try IP Range Calculator; for mask math, use CIDR to IP Range Calculator.
Common use cases
- •Size firewall rules for a purchased IP block
- •Audit whether a range matches documentation
IP range lookup tool vs calculators
This tool analyzes a single CIDR block you already have. IP Range Calculator finds spans between two IPs; CIDR to IP Range Calculator focuses on prefix expansion with the same boundary math.
Planning firewall rules
Summarize a block before adding allow/deny rules so you do not accidentally open too many addresses.
Frequently Asked Questions
Yes. VSPIC offers this IP range lookup tool at no cost with no account required. Results load in real time.
We do not permanently store your queries on our servers. Some tools run entirely in your browser; others fetch public data for the request only.
Yes. Open the page in any modern phone or tablet browser. Results work on Wi‑Fi and mobile data.
An IP range lookup tool takes CIDR notation and returns network address, broadcast, first/last hosts, and address counts — a quick audit before writing ACLs or route summaries.
Both expand prefixes. This ip range lookup tool page emphasizes block analysis for security and ops workflows; the CIDR to IP Range Calculator adds detailed conversion-focused guide content.
Need your public IP first?
Instantly see IPv4, IPv6, ISP, city, and map before other network tests.
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