Telecommunications

IP Toolkit: every IP calculation, in one fast toolkit

25 precision networking tools — subnetting, CIDR, DNS, WHOIS — that run entirely in the browser.

Industry: Telecommunications
Platform: Web

Network engineers do the same calculations every day — subnet splits, CIDR maths, address conversions — and the web tools they reach for are wrapped in ads, logins and trackers, which is a strange thing to accept from a tool you use mid-incident. IP Toolkit is our answer: 25 purpose-built calculators and lookups in one place, free forever. The calculation tools are 100% client-side — the maths runs in the browser, works offline, and no IP data ever leaves the device — which matters to exactly the audience this serves.

The challenge

The audience is engineers who live in the CLI: they distrust tools that phone home, they notice a 200ms lag, and they leave the moment a modal asks them to sign up. Winning them means being faster than a local script and provably private. Technically, subnetting maths has unforgiving edge cases — IPv6 at 128 bits, VLSM allocation ordering, supernet boundaries — where an off-by-one is not a cosmetic bug but a wrong network design.

Our strategy

Client-side by default was the founding decision, not an optimisation: if the computation never leaves the browser, privacy is a property of the architecture rather than a promise in a policy. Only the lookups that genuinely need the network — DNS, WHOIS, geolocation — make a request, and only when the user asks. Every tool follows the same contract: instant results as you type, copy-ready output, and keyboard-first operation, because the person using it is halfway through a maintenance window.

The solution

The toolkit covers IPv4 and IPv6 subnetting, CIDR, VLSM planning, supernet and route summarisation, base conversions, IPv4↔IPv6 mapping, MAC normalisation, IP extraction from raw text, bandwidth calculators and random address generation — plus live DNS, reverse DNS, dig, WHOIS, ASN, geolocation, DNSBL blacklist and port checks. Each tool is its own focused page with copy-ready output blocks, so the result drops straight into a ticket or a terminal. There are no accounts, no ads and no trackers anywhere.

Results

What changed

25

tools in one place

One toolkit, whole workflow

Calculators, converters and lookups an engineer otherwise collects from ten sites.
100%

client-side calculation

Privacy by architecture

Subnet maths executes locally and works offline; nothing is sent to be computed.
0

sign-ups or trackers

Nothing between you and the answer

No accounts, no ads, no analytics scripts watching the input.
Free

forever

No upgrade wall

Every tool is available to everyone, with nothing held back.

Key features

What we built

IPv4 & IPv6 subnet calculators

Split, size and verify networks with instant, copy-ready results.
VLSM & supernet planning

Variable-length allocation and route summarisation without spreadsheet gymnastics.
DNS, WHOIS & ASN lookups

Registry and resolver queries on demand — dig, reverse DNS and blacklist checks included.
100% client-side maths

The calculators run in the browser and keep working offline.
Private by default

No sign-up, no ads, no trackers — and no IP data ever leaves the device.
Copy-ready output

Every result is formatted to paste straight into a ticket or terminal.

Interface

IP Toolkit on the desktop
IP Toolkit on a tablet
IP Toolkit on a phone

Frequently asked questions

Is IP Toolkit a client project or a VBRO product?

It is our own product — designed, built and operated by VBRO Technology as a free resource for the networking community.

Is it really private?

Yes, by construction. The calculators are 100% client-side: the maths runs in your browser and works offline, so IP data cannot leave your device. Only the lookup tools — DNS, WHOIS, geolocation — make a network request, and only when you run one.

Which tools are included?

25 in total: IPv4/IPv6 subnet and CIDR calculators, VLSM, supernetting, base conversion, IPv4↔IPv6 mapping, MAC normalisation, IP extraction, bandwidth calculators, plus DNS, reverse DNS, dig, WHOIS, ASN, geolocation, blacklist and port checks.

What does it cost?

Nothing — it is free forever, with no ads and no premium tier. It exists because we wanted these tools without the noise, and we suspect other engineers do too.