FOR VOICE NETWORK TEAMS

See the calling numbers entering your network.

When a customer or peer hands you voice traffic, the number presented as caller ID is one signal your network may need to evaluate. Explore a DNO check designed around your traffic and policy.

Discuss a carrier pilot

Carrier-scale access and pricing are scoped with your team

Two voice network professionals reviewing traffic at a workstation

A useful signal at the network edge

Review the calling number on traffic entering your network before your team decides how to handle it. A DNO source can flag numbers that should not originate calls; your policy still decides what to do with each result.

Listed
This source says the number should not originate calls.
Not listed
No listing in this source at the time checked.
Unavailable
The source did not return an answer. Use your defined fallback or try again later.

Illustrative provider evaluation

Calling numberDNO sourceYour policy

Customer traffic handoff

Presented ANI
Calling number from customer
DNO source
Listed in checked source
Network action
Determined by your policy
Example only · source result checked at 10:30 AM ET

Screen customer traffic

Evaluate the number presented on calls a customer sends into your network.

Investigate a blocked call

Review a dated source result when a customer disputes a block.

Plan for volume

Scope throughput, freshness, fallback behavior and cost before any inline use.

Start with a measured carrier pilot

Tell us where your traffic enters, the volume you expect, and how you handle uncertain results. We’ll define a sample, performance target and commercial terms together.

Discuss carrier accessCarrier-scale pricing is custom. The $0.03 rate applies to on-demand lookups.

A single DNO source is not a complete DNO program. Your network owns its blocking policy and compliance decisions.