All-in-one builder toolbox for Phone Numbers
Get instant access to phone numbers in 100+ countries. Twilio has global inventory, APIs, and software for you to engage your customers at scale anywhere in the world.
Phone Numbers Overview
Instantly provision, manage, port, host, or release local, mobile, toll-free, and national phone numbers in 100+ countries using Twilio’s Phone Numbers APIs.
Docs
Tutorials & guides
FAQ Guides
Twilio named a Leader in the 2025 Gartner® Magic Quadrant for CPaaS
Twilio is recognized for its Ability to Execute and Completeness of Vision.
FAQs
Use the Available Phone Number API or the Twilio Console to search for phone numbers by country, area code, number type, and capabilities to find the right number.
We’re committed to fighting back against unwanted robocalls. You can prevent spam or unwanted calls on your phone numbers by adding call screening and blocking logic. For example, you can use the <Reject> verb in TwiML, Studio, or Functions to block unwanted calls.
To manage your Twilio phone numbers effectively, you should keep the numbers active, monitor usage, follow compliance rules, and properly manage your inventory to avoid number reclamation or service disruption.
Use phone number validation services, format numbers in E.164, and optionally send verification codes via SMS or voice to ensure accuracy and prevent fraud.
You can read more of our best practices for phone number validation here.
Build now, buy later.
Start for free. Sign up for a free trial—no credit card required.
All-in-one builder toolbox for Phone Numbers
Get instant access to phone numbers in 100+ countries. Twilio has global inventory, APIs, and software for you to engage your customers at scale anywhere in the world.
Get started fast
What will you build next? Here are some resources to get started on your first phone number project.
Phone Numbers Overview
Instantly provision, manage, port, host, or release local, mobile, toll-free, and national phone numbers in 100+ countries using Twilio’s Phone Numbers APIs.
Get Building
Dig into our up-to-date docs, tutorials, and guides to get started with your Twilio project.
Docs
Tutorials & guides
Everyone can be a builder
Twilio is for every kind of builder. Get started with our guides or explore partners for pre-built solutions.
FAQ Guides
Twilio named a Leader in the 2025 Gartner® Magic Quadrant for CPaaS
Twilio is recognized for its Ability to Execute and Completeness of Vision.
Best practices & continued learning
We’ve already done the exploration, prototyping, testing, and troubleshooting so you don’t have to.
Community & collaboration
Connect, share, and grow with other developers who build with Twilio tools.
FAQs
Use the Available Phone Number API or the Twilio Console to search for phone numbers by country, area code, number type, and capabilities to find the right number.
We’re committed to fighting back against unwanted robocalls. You can prevent spam or unwanted calls on your phone numbers by adding call screening and blocking logic. For example, you can use the <Reject> verb in TwiML, Studio, or Functions to block unwanted calls.
To manage your Twilio phone numbers effectively, you should keep the numbers active, monitor usage, follow compliance rules, and properly manage your inventory to avoid number reclamation or service disruption.
Use phone number validation services, format numbers in E.164, and optionally send verification codes via SMS or voice to ensure accuracy and prevent fraud.
You can read more of our best practices for phone number validation here.
Build now, buy later.
Start for free. Sign up for a free trial—no credit card required.