Frequently Asked Questions

Listed below are the frequently asked questions and answers. If you have a question that you would like us to answer and post to this site, please let us know using the feedback form .

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What is the Telephone Consumer Protection Act of 1991?

What is the Intermodal Ported Telephone Number Service?

Who should subscribe to the Intermodal Ported Telephone Number Service?

What will happen if my company does not comply with the TCPA?

How does my company register?


Interactive voice response for the Automated TN Lookup System

How do I get a Personal Identification Number (PIN) for the Automated TN Lookup System (IVR)?

What is the call in number for the IVR system?

How long does it take for an IVR PIN to be assigned?

Is the IVR a free service?

How many telephone numbers per call can be checked using the IVR?

About The NPAC

Who checks to make sure that Neustar is remaining neutral in its role as the NPAC administrator?

What do I do if I believe Neustar has violated its neutrality agreement?

If I file a complaint about Neustar’s neutrality, about how long will it be before I receive a response?

What happens if Neustar is found to be in violation of the Neutrality agreement?

Does the NPAC support numbers located only in the United States?


What is the LNPA WG?

Who can participate in the LNPA WG?

What does the LNPA WG do?

When and where does the LNPA WG meet?

How can I get on the LNPA WG's mailing list?


Where can I research and verify Neustar’s right to bill for LNP services?

I don’t participate in NPAC services. Why am I being billed?

What is a 499A form?

I may have filled out my most recent 499A form incorrectly. What should I do?

How are LNP charges calculated?

Number Portability

What is local number portability (LNP)?

Why was LNP introduced?

What does LNP accomplish?

What communication service types are supported with LNP?

How do I register as an NPAC SMS user?