Kaspr Blog - B2B | Prospecting | Sales | Recruitment

7 Ways to Get a List of Cell Phone Numbers [Tools]

Written by Daisy Shevlin | Jul 24, 2025 8:00:00 AM

Looking for the best ways to generate a list of cell phone numbers to cold call potential prospects? These seven B2B prospecting tools can help.👇 

1. Cognism

Kaspr is part of the Cognism Group, and it just got an upgrade with the launch of Sales Companion! Sales Companion is everything you love about Kaspr, but with more powerful features, deeper integrations, and global coverage.

Cognism is a sales intelligence platform with a web app and browser extension that provides company, contact, and intent data. It has one of the largest databases of up-to-date and accurate cell phone numbers for contacts in the US, EMEA and APAC, making it a popular choice for SDRs

Cognism’s Diamond Data® uses phone verification to ensure the database accuracy of B2B cell phone numbers. 

The database isn’t just accurate and GDPR- and CCPA-compliant. They check mobile numbers against global Do-Not-Call (DNC) registries, removing contact data that shouldn’t be there. 👊

Top features: 

  • Phone verification of contact data.
  • It is one of the largest databases of European and US contact information.
  • Connect with 87% of your list.
  • GDPR and CCPA compliance. 

2. Seamless.AI

Seamless.AI is a solid platform for B2B SDRs who want to build cell phone lists quickly. It has a search engine that’s updated in nearly real-time, providing verified phone numbers, emails, and other critical contact data. 

Like many tools on this list, Seamless.AI has a web app, a Chrome Extension, and many integrations with popular CRM and sales intelligence tools

(Source: G2)

Top features: 

  • Real-time continuous data verification.
  • Chrome Extension and web app.
  • Pitch intelligence and insights with AI features. 

3. ZoomInfo

ZoomInfo is often used as a cell phone lookup service, offering B2B contact and company data. It comes with both a web app and a Chrome Extension. 

ZoomInfo’s database of phone numbers has advanced search filters. Search for prospects based on industries, job titles, locations, company size, etc. They also have intent data available. 

(Source: ZoomInfo)

Top features

  • Advanced search filters.
  • Intent data with real-time alerts.
  • Website visitor tracking.
  • CRM integrations. 

 

4. Lead411

Lead411 is a B2B database with intuitive search functions. The platform uses a combined AI and human verification approach to ensure that the data they pull from multiple sources is up-to-date. 

Bombora intent data is also available, allowing you to identify prospects actively in the market. Lead411 is often used as a data enrichment platform, with brands updating contact data in their CRM from the platform’s database. 

(Source: G2)

Top features: 

  • Bombora intent data. 
  • Human and AI verification of phone numbers.
  • Data enrichment capabilities. 

5. RocketReach

RocketReach has over 4.5B records in its database. The platform uses AI to continuously scan multiple sources to verify and maintain contact data accuracy, including (of course!) phone numbers and email addresses. 

The database has advanced search features that allow you to narrow your searches with filters like a prospect’s education, role, department, skills, or years of experience. You can also search by a company’s number of employees, revenue, and industry. Some plans include intent data. 

(Source: G2)

Top features: 

  • Advanced search based on company and personal traits.
  • Fast lookup speeds.
  • Chrome Extensions and web database available.
  • Extensive integrations with other sales intelligence tools and CRMs.
  • Bulk lookup. 
  • AI verification. 

đź’ˇ Interested to see how Kaspr stacks up to RocketReach?

6. UpLead

UpLead is another solution for building a phone numbers list. Its database covers over 200 countries, and the data enrichment features will help you add deeper insights to your phone lists with information on the companies and contacts you’re about to call.

The Chrome Extension will allow you to find contact info on company websites and LinkedIn profiles. 

(Source: G2)

Top features:

  • Chrome Extension and web app for building phone number lists.
  • Data from 200 countries.
  • Enrich the list with company and contact information.

7. SalesIntel

SalesIntel is a leading B2B data provider focused on delivering human-verified contact information. Its database values accuracy, with millions of direct dials and verified business emails to support your prospecting efforts.

The SalesIntel RevDriver Chrome Extension makes capturing contact details directly from LinkedIn profiles and company websites easy while browsing.

(Source: SalesIntel)

Top features:

  • Chrome Extension (RevDriver) and web platform for building phone number lists.
  • Human-verified data, including direct dials and business emails.
  • Contact enrichment with firmographic and technographic insights.

What is a phone number list?

Phone number lists are used in B2B for SDRs to make cold calls. Just as they sound, they are a list of contact phone numbers, usually direct dials, which means the rep can get straight through to the person they’re trying to contact.

What’s the best way to find phone numbers online?

For B2B purposes, the best way to find phone numbers online is to use a tool like Kaspr or Cognism. They are SaaS solutions with a platform and database with GDPR and CCPA-aligned data. Tools like these will keep you compliant and ensure you’re not calling non-existent or outdated phone numbers.

Can you get phone number lists for free?

Yes, you can get phone lists for free. Phone finders like Cognism and Kaspr have free leads you can try, which means you can test the phone numbers before committing to a paid plan.

Try Cognism’s leads to find phone numbers

Kaspr is part of the Cognism Group, and it just got an upgrade with the launch of Sales Companion! It’s everything you love about Kaspr, but with more powerful features, deeper integrations, and global coverage. Take their data for a test drive with 25 free leads today. 👇