---
title: "Free tools"
url: "https://numberburn.com/tools.md"
canonical_url: "https://numberburn.com/tools"
last_updated: "2026-10-19"
type: "index"
summary: "Free NumberBurn tools: check how a US phone number is formed, or look up its line type, carrier and a risk level built from public complaint reports."
related: ["https://numberburn.com/tools/number-lookup.md", "https://numberburn.com/tools/spam-number-lookup.md"]
---

# Free tools

Free NumberBurn tools: check how a US phone number is formed, or look up its line type, carrier and a risk level built from public complaint reports.

Small things we built and give away: check how a US number is formed, or see what public complaints say about a number.

## About these tools

Free tools on this site do one small job well and show exactly what they checked.

- [Free US phone number check](https://numberburn.com/tools/number-lookup.md): Check that a US phone number is well formed and see its area code, state and standard formats. In your browser, nothing sent.
- [Free spam number lookup](https://numberburn.com/tools/spam-number-lookup.md): See the line type, the carrier a number block was first assigned to, and a risk level from public complaint reports.

Each tool is free and needs no account.

## Related

- [Free US phone number check](https://numberburn.com/tools/number-lookup.md)
- [Free spam number lookup](https://numberburn.com/tools/spam-number-lookup.md)