Verify phone number authenticity with ease and accuracy
Our Lookup API leverages Home Location Register data to provide real-time validation of phone numbers, helping you enhance your outreach quality and optimise communications.
Increase the ROI of your mobile campaigns
Use Kaleyra’s Lookup API to improve campaign efficiency by filtering out invalid numbers, thus maximising reach and minimising wasted spend.
1
Optimise costs
Use our Lookup feature to identify unserviceable numbers and save communication costs in each campaign.
2
Global reach
Check the validity of phone numbers in your home country and all the other places your business functions in.
3
Gather rich data
Avail reliable details about the validity, portability, network operator, and roaming status of the phone numbers in your database.
4
Plan campaigns
Devise geo-specific marketing and promotional activities using your customers’ network carrier details.
Use Kaleyra’s HLR API for enterprises
Use Kaleyra’s HLR API for enterprises
Benefit from our international presence
-
With 1600+ service provider relationships, we can validate phone numbers in 190+ countries.
Lookup unlimited contacts
-
Whatever the scale of your database, we process it with accuracy. There is no upper limit to the number of contacts you can upload.
Experience an intuitive interface
-
Perform lookup for millions of contacts from our easy-to-use platform, in just a few clicks.
Our latest resources
Analyst Recognitions
Tata Communications Recognised as an Established Leader in the Juniper Research 2025 CPaaS Leaderboard
Leading the Future of Enterprise Customer Engagement Strategy
White Papers
Build vs. Partner: A three-year TCO analysis of multi-agent AI deployment for commerce at scale
Deep dive into AI economics for retail CX.