Find Phone Numbers for B2B Contacts
Find Phone Numbers for B2B Contacts with Cleanlist's waterfall enrichment. Upload a CSV or connect your CRM — 30 free credits to start.
Start Free — 30 CreditsThe Problem
Cold calling remains one of the highest-converting outbound channels for B2B sales, but it fails at the first step when reps do not have direct dial numbers. Company switchboards route to voicemail 90% of the time, and the few contacts who answer gatekept lines are already annoyed before the conversation starts. SDRs need direct dials and mobile numbers — and most CRMs have phone coverage below 40%.
How Cleanlist Solves This
Cleanlist finds verified direct dial and mobile phone numbers for B2B professionals. Provide a name and company (or email address) and Cleanlist searches 15+ phone data providers to find direct lines, mobile numbers, and verified switchboard extensions. Every returned number is checked for connectivity — disconnected, reassigned, and VoIP-only numbers are flagged before they reach your dialing queue.
Direct Dials Produce 5x More Conversations Per Hour Than Switchboard Calls
ConnectAndSell's 2025 Cold Calling Benchmark analyzed 2.8 million outbound dials and found that reps using direct dial numbers averaged 4.7 live conversations per hour, compared to 0.9 conversations per hour when dialing switchboard numbers. The 5x gap exists because direct dials bypass three time-consuming friction points: navigating phone trees (average 45 seconds per attempt), convincing gatekeepers (success rate under 20%), and leaving voicemails that are never returned (callback rate under 2%). For an SDR making 60 dials per day, the difference between a switchboard-only list and a direct-dial list is the difference between 5 conversations and 25 conversations. At a 15% meeting booking rate per conversation, that is 0.75 meetings per day versus 3.75 meetings per day — a factor that directly determines pipeline generation and quota attainment. Investing in phone data quality is not a nice-to-have for cold calling teams; it is the single highest-leverage improvement available.
Source: ConnectAndSell Cold Calling Benchmark 2025 (2.8M dials analyzed)
How It Works
Provide Contact Identifiers
Enter a name and company, an email address, or a LinkedIn URL. For bulk lookup, upload a CSV with any combination of these identifiers — Cleanlist handles mixed-format files and auto-detects columns.
Multi-Source Phone Search
Cleanlist queries 15+ phone data providers in a waterfall sequence. Sources include business directories, professional databases, carrier records, and publicly available filings. Each source specializes in different segments — corporate direct dials, mobile numbers, or verified extensions.
Number Type Classification
Every returned number is classified: Direct Dial (landline to their desk), Mobile (personal or company-issued cell), Switchboard + Extension, or VoIP. SDR teams can prioritize direct dials and mobile numbers for cold calling effectiveness.
Connectivity Verification
Each number is checked for active service: is the line connected, is it accepting calls, and does the carrier match the expected geography? Disconnected numbers, fax lines, and numbers reassigned to different subscribers are filtered out.
DNC & Compliance Check
Numbers are checked against the National Do Not Call Registry and state-level DNC lists. TCPA compliance flags are applied to mobile numbers to help your team stay compliant with cold calling regulations.
Export Dialing-Ready List
Download phone numbers alongside your original contact data, formatted for direct import into your dialer (Salesloft, Outreach, Orum, PhoneBurner, etc.). Numbers are formatted in E.164 standard with country code.
Key Benefits
98% Email Accuracy
Real-time email verification catches bounces, catch-alls, and disposable addresses before they cost you.
15+ Data Providers
Waterfall enrichment across multiple providers means higher match rates than any single-source tool.
No Code Required
Upload a CSV, connect your CRM, or use the API. Works however your team prefers.
30 Free Credits
Start enriching immediately. No credit card, no sales call, no commitment.
Manual Process vs Cleanlist
| Feature | Manual | Cleanlist |
|---|---|---|
| Phone number types returned | Switchboard number from company website | Direct dial, mobile, and verified extension |
| Coverage rate | 10-20% (only publicly listed numbers) | 85% direct dial / mobile coverage for B2B contacts |
| Time to find numbers for 500 contacts | 8-12 hours of manual research | Under 5 minutes (batch processing) |
| DNC compliance checking | Separate manual lookup per number | Automated NDNC + state registry check on every number |
| Disconnected number detection | Discovered only when the call fails | Pre-verified — disconnected numbers are filtered before export |
Frequently Asked Questions
How accurate is Cleanlist's data?
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Cleanlist achieves 98% email accuracy through real-time verification and cross-referencing across 15+ data providers. Every record is validated before delivery.
How many free credits do I get?
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Every new account starts with 30 free credits. Each credit processes one record (enrichment, verification, or lookup). No credit card required to start.
What data providers does Cleanlist use?
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Cleanlist uses waterfall enrichment across 15+ providers including major B2B data sources. The system automatically selects the best provider for each record to maximize match rates.
Can I connect my CRM?
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Yes. Cleanlist integrates with HubSpot, Salesforce, and other CRMs. Enriched data syncs back automatically. You can also upload CSV files or use the REST API.
How long does it take to find my data?
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Most jobs complete in under 2 minutes for up to 10,000 records. Larger files are processed in batches with progress updates.
What is the difference between a direct dial and a switchboard extension?
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A direct dial is a phone number that rings the person's desk or phone directly without going through a receptionist or phone tree. A switchboard extension requires dialing the main company number first, then entering an extension. Direct dials have 3-5x higher connection rates than switchboard numbers because they bypass gatekeepers entirely.
Are mobile numbers included, and is it legal to cold call them?
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Yes, Cleanlist returns mobile numbers when available. Regarding legality: in the US, the TCPA restricts automated dialing to mobile numbers but allows manual dialing for B2B purposes as long as the number is not on the National DNC Registry. Cleanlist checks DNC status automatically and flags restricted numbers. Always consult your legal team for compliance in your specific jurisdiction.
How often are phone numbers updated in Cleanlist's database?
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Cleanlist's phone data is sourced from providers that refresh their databases monthly to quarterly. For critical outreach lists, we recommend re-verifying phone numbers every 90 days, as B2B phone data decays at roughly 4% per month — twice as fast as email addresses.
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