Phone Number Lookup

Dynamic Number Intelligence

Send smarter and save: validate numbers, reduce rejections, predict costs.

Talk to an expert

See every number clearly. So you can send with confidence.

Increase ROI knowing you’re only sending to numbers that can receive messages. Access valuable customer number information with Dynamic Number Intelligence to make the most of each connection.

POST https://numbers.bandwidth.com/api/v1/accounts/9999999/tnlookup HTTP/1.1
Content-Type: application/json
Authorization: Basic dXNlcm5hbWU6cGFzc3dvcmQ=

Example: One TN Request Payload

{
  "tns": [
    "19196104423"
  ]
}

Example: Multiple TNs Request Payload

{
  "tns": [
    "19196104423",
    "+19196104424"
  ]
}

Above is an example what a request to the phone number lookup API can look like.

A network built for developers

Bandwidth’s number lookup APIs give you the power to scale your tools, products, and applications while providing a better customer experience, all backed by our owned network with global reach.

Why DNI?

Discover the benefits of dynamic number intelligence.

Quick & cost effective validations

Scan and verify new sign-ups in real time, filtering out numbers that can’t receive messages so your campaigns reach active phones — lowering bounce rates and conserving budget.

Keep campaigns compliant

Identify numbers likely to be reassigned and remove them from distribution lists to help maintain compliance with carrier and CTIA policies.

Transparent rejections

Correlate rejection patterns to specific carriers, enabling you to troubleshoot routing or target remediation where it will have the most impact.

Predict costs easier

Use the carrier name included in each delivery webhook to tally message volume by carrier over time, so you can more accurately forecast messaging spend.

Clean lists, clear results

Monitor list health to flag recently deactivated numbers and remove them before they waste resources or trigger delivery issues, keeping your lists current and compliant.

No more trade-offs when verifying? Check.

Leverage unlimited usage with a predictable monthly cost.

Communicate smarter with number insights

Connect with customers the way they like while optimizing your customer communication costs. Let’s talk it through.

Talk to an expert or request a trial

Our support is always on and always included

White-glove support delivered 24/7/365
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24/7 proactive Network Operations Center (NOC)

Message smarter at Bandwidth

Check out these additional resources to get the scoop on all things messaging.

Dynamic Number Intelligence