Verizon is working to restore trust in voice calling

Spoofed Caller IDs and fraudulent robocalls have trained your customers to not answer the phone. We're taking steps to help businesses improve voice security.

How fraud and spoofing hurts business

Malicious callers hide behind real-looking Caller IDs. And when people can’t trust that callers are who they claim to be, they stop answering even legitimate calls.

That means you can’t reach your customers, and governments can’t reach the public they’re supposed to serve. It damages your brand and operations, costing you money in lost business and opportunity. And if you run a call center, spoofed Caller ID leaves you open to telephone denial-of-service (tDoS) and other attacks.

STIR/SHAKEN is a foundational weapon in the fight for voice security and against fraud and spoofing, and Verizon is leading the way. 


Percentage of Americans who don't answer calls from unrecognized numbers


Billions of unwanted calls placed in 2019


Proportion of calls from toll-free numbers labelled "nuisance" or "high-risk"


Billions of dollars lost to phone fraud in 2019


STIR/SHAKEN is a carrier-based caller ID authentication solution that requires business calls to be digitally signed by an originating carrier and authenticated by terminating carriers. It uses the same public-key cryptography process that secures e-commerce websites.

The STIR/SHAKEN initiative is a set of interconnected standards developed with the Internet Engineering Task Force (IETF), the Alliance for Telecommunications Industry Solutions (ATIS), the Robocalling Strike Force, the Professional Association for Customer Engagement (PACE), the SIP Forum, and industry partners including the AARP.

Verizon sits on the board of the STIR/SHAKEN governance authority, to establish policy, regulatory frameworks, emerging standards and testing, and designation of certifying authorities. We are strong supporters of the TRACED Act, the Do Not Call registry, and the Telephone Consumer Protection Act. Verizon is actively engaged with the Federal Communications Commission (FCC), Congress and state governments, providing feedback and recommendations on policy, guidelines and best practices.

Verizon is leading the fight against fraud.

Our inbound and outbound calling solutions protect enterprises and consumers by helping ensure that calls actually originate from whom they claim to come.

  • STIR/SHAKEN solutions from Verizon

  • Verizon features a suite of voice security solutions that will support STIR/SHAKEN protocols for both inbound and outbound call centers. Click on a product name to find out more about each of them.

  • IP Contact Center

  • IP Contact Center is Verizon’s portfolio of fully hosted and secure interaction services, including Voice over IP (VoIP) Inbound Voice and IP interactive voice response (IVR). Control your costs, streamline your operations and improve your customers’ experience.

    Learn more
  • Company Name ID

  • Company Name ID lets you control how your company's callback number appears on customers’ Caller ID displays. For instance, Company Name ID lets you show a corporate number when a field technician calls a customer.

    Learn more
  • VoIP Inbound Anti-Fraud & Authentication (VIAA)

  • Reduce the risk of inbound fraud with VIAA, a sophisticated software solution that uses real-time analytics, artificial intelligence, and machine learning to protect call centers against spoofed and illegal calls.

    Learn more
  • VoIP Inbound Local Origination

  • Harness the power of Verizon‘s VoIP network to give your business cost-effective, flexible communications. Our IP Trunking can get you ahead of the competition and connect your business.

    Learn more
  • Voice Defense Professional Services

  • Voice Defense Professional Services is a network-based solution that monitors inbound traffic to protect enterprise telephone and contact center voice infrastructure from telephone DoS (tDoS) and other attacks.

    Learn more
  • SecureLogix

  • SecureLogix is an integrated hardware and software solution for enterprise and public sector voice networks. It provides full voice network security and centralizes monitoring and reporting while helping protect against telephone DOS (tDoS) attacks and toll fraud.

STIR/SHAKEN resources

What is spoofing? +

What is spoofing?

Falsifying Caller ID data is called “spoofing,” and fraudulent callers often hide their identities and intentions behind spoofed Caller IDs.

What are common types of spoofing? +

What are common types of spoofing?

Spoofers have many tricks to get you to answer the phone. Here are some of them:

  • Making calls look more local
  • Using a customer’s own number
  • Pretending to represent a legitimate business
  • Impersonating a corporate call
Are robocalls a problem? +

Are all robocalls a problem?

Robocalls have become a favorite vector for fraud, but legitimate robocalls are valuable tools for businesses and governments:

  • Reverse 911
  • School closings
  • Collections
  • Business win-back

Let's get started.