Advanced Public IP Calculator

Calculator Form

IP Address

Enter any IPv4 or IPv6 address you want to analyze.

CIDR Prefix

Leave blank to use smart defaults.

Active Endpoints

Used for utilization and transfer planning.

Daily Requests per Endpoint

Average requests one endpoint sends each day.

Average Payload Size (KB)

Use compressed transfer size where possible.

Billing Days per Month

Used to estimate monthly traffic volume.

Environment Label

Optional tag included in the report export.

Resolve hostname with PTR lookup

Detected Visitor IP

Detection may differ behind proxies, VPNs, or load balancers.

Example Data Table

Label	IP	CIDR	Version	Network	Public Status	Daily Traffic GB
DNS Resolver	8.8.8.8	/24	IPv4	8.8.8.0	Public routable	3.52
Anycast Edge	1.1.1.1	/20	IPv4	1.1.0.0	Public routable	14.06
Global DNS	2001:4860:4860::8888	/64	IPv6	2001:4860:4860::	Public routable	7.03
Content Edge	2606:4700:4700::1111	/56	IPv6	2606:4700:4700::	Public routable	11.72

Formula Used

IPv4 network address = IP address AND subnet mask.

IPv4 broadcast address = network address OR inverse subnet mask.

IPv4 total addresses = 2^{(32 − prefix)}.

IPv4 usable hosts = total addresses − 2, except /31 and /32 special cases.

IPv6 address capacity = 2^{(128 − prefix)}.

Daily traffic GB = active endpoints × daily requests × payload KB ÷ 1024 ÷ 1024.

Monthly traffic GB = daily traffic GB × billing days.

Utilization compares active endpoints against usable host capacity or prefix capacity.

How to Use This Calculator

Enter the IPv4 or IPv6 address you want to inspect.
Add a CIDR prefix, or leave it blank for the default suggestion.
Fill in active endpoints, request volume, payload size, and billing days.
Optionally enter a label and enable PTR hostname lookup.
Click Calculate Public IP to show results below the header and above the form.
Review the network range, routing details, traffic estimates, and Plotly graph.
Use the CSV button for spreadsheet export or the PDF button for a printable report.

FAQs

1. What does this calculator analyze?

It validates an address, identifies the version, checks public routing status, calculates CIDR range details, estimates address capacity, and models transfer volume from your traffic inputs.

2. Can it work with IPv4 and IPv6?

Yes. It accepts both formats, then switches calculations automatically. IPv4 shows subnet and host details. IPv6 shows expanded form, prefix capacity, and range endpoints.

3. Why can a valid IP show as non-routable?

A valid address can still belong to private, loopback, link-local, multicast, documentation, or other reserved ranges. Those ranges are not considered public internet routable space.

4. What is the purpose of the CIDR prefix?

The prefix defines how many bits belong to the network. A smaller prefix creates a larger range. A larger prefix creates a smaller, more specific range.

5. Why do /31 and /32 IPv4 results behave differently?

They are special cases. A /32 identifies one address exactly. A /31 is often used for point-to-point links, so both addresses may be considered usable.

6. How is the traffic graph calculated?

The graph multiplies active endpoints, daily requests, and average payload size. It then converts that result into gigabytes for daily, weekly, and monthly planning.

7. Is the detected visitor IP always exact?

Not always. Reverse proxies, VPNs, CDNs, corporate gateways, and load balancers can change which address the server receives or exposes in request headers.

8. What should I export, CSV or PDF?

Use CSV when you want spreadsheet analysis or internal reporting. Use PDF when you need a clean, shareable snapshot for audits, reviews, or documentation.