PilotLookup Blog
Expert insights on phone validation, carrier lookup, fraud prevention, and API integration best practices.
How to Validate US Phone Numbers in Your App: A Developer's Guide
US phone validation is more than a regex check. This guide walks through every layer — from E.164 normalization and NPA rules to carrier lookup APIs — with working code examples in Node.js, Python, and PHP.
Phone Number Validation 101: How Real-Time Phone Verification Protects Your Business
Learn how real-time phone verification protects your business from fraud, failed SMS delivery, and bad data. A beginner's guide with real-world examples.
Customer Stories
Trusted by Developers Around the World
Thousands of teams rely on PilotLookup every day to validate numbers, reduce fraud, and improve deliverability.
“PilotLookup cut our fraud rate by 40% in the first month. The carrier data is incredibly accurate and the API response times are unbeatable.”
Alex Turner
Lead Developer — VerifyStack Inc.
“We evaluated three carrier lookup providers before choosing PilotLookup. It was the easiest integration and the most reliable data we have seen.”
Maria Gonzalez
CTO — MessageFlow
“The documentation is fantastic and the API is dead-simple to use. We had it running in production within an afternoon.”
James Park
Backend Engineer — Quorum Labs
“Our SMS delivery rate jumped from 82% to 97% after we started validating numbers with PilotLookup before sending. Huge ROI.”
Sophia Reyes
Product Manager — Sendly
“Excellent value for the credit packs. We use it for account verification and the accuracy on VoIP detection has been a game-changer for blocking fake signups.”
David Kim
Founder — NomadAuth
“Support is responsive and the uptime has been rock-solid. Exactly the kind of reliability you need when phone validation is critical to your product.”
Rachel Moore
Engineering Manager — TrustLayer
Rated 4.9/5 based on 200+ reviews. Explore our Trustpilot reviews.
Frequently Asked Questions