Append Phone Numbers to Your Contact List
Append Phone Numbers to Your Contact List with Cleanlist's waterfall enrichment. Upload a CSV or connect your CRM — 30 free credits to start.
One verified, deliverable list. Reconciled from 15+ raw sources, every run.
Check a phone number free
Validate format, country, and line type instantly, then find direct dials at scale with Cleanlist.
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The Problem
B2B sales teams increasingly rely on multi-channel outreach, email plus phone, but most lead lists arrive with email addresses only. Reps then repeat the same manual research once per row, searching LinkedIn, company websites and free lookup tools for a direct dial, and often finding a switchboard number that never reaches the decision-maker. The phone data gap is worse in certain segments: SMB companies, founders at early-stage startups, and contacts in industries with high job turnover are the hardest for any single provider to cover.
How Cleanlist Solves This
Cleanlist's phone number append service queries 15+ data providers in a waterfall sequence to find direct dial and mobile phone numbers for your existing contacts. The waterfall exists because no single provider covers every segment, geography and company size equally well: one is strongest on enterprise direct dials, another on SMB mobile numbers, another on recently changed numbers. The product spec is 85% direct dials. Cleanlist owns no contact database. Every appended number includes line type (mobile, landline or VoIP) so reps can route the list before dialing.
The Constraint on Multi-Channel Outreach Is Usually the Phone Column, Not the Plan
Most teams that run email-only outbound are not choosing email over phone. They are working from a list where the phone column is empty, and the plan quietly conforms to the data. That is the specific failure a phone append fixes, and it is worth naming precisely because it is invisible in a sequence report: a channel that was never attempted produces no negative signal, so it never surfaces as a problem to solve. The economics of fixing it are legible in advance rather than in hindsight. Cleanlist charges 10 credits per phone number, search costs nothing, and format checks are free, so the spend scales with the numbers actually returned instead of with the size of the list uploaded. A free account includes 30 credits per month with no card, which is enough to append three numbers and see the shape of the output before committing to a plan.
How It Works
Upload Your Contact List
Upload a CSV or connect your CRM. For phone append, the minimum required fields are name and company (or email domain). More context fields (title, location) improve match rates by helping providers disambiguate common names.
Select Phone Number Types
Choose which types of phone numbers to append: direct office dial, mobile/cell, or both. You can also opt into additional phone data: carrier type (mobile, landline, VoIP) and line status (active, disconnected).
Waterfall Enrichment for Maximum Coverage
Cleanlist queries providers in sequence, starting with the most accurate source for each segment. If Provider A returns no phone number, Provider B tries with different data. The cascade continues until a verified number is found or all sources are exhausted.
Verify and Score Each Number
Every appended number is validated for format, carrier type, and line status. Numbers flagged as disconnected or VoIP-only (often not a direct line) are marked so reps can prioritize their call list.
Review Match Results
See a summary of phone append results: total matched, match rate by segment, and carrier type breakdown. Search costs 0 credits and format checks are free, so you only spend the 10 credits per phone on the numbers actually returned.
Export or Sync Appended Data
Download the enriched file with phone numbers added alongside your original data, or sync directly back to HubSpot or Salesforce. The phone field maps to your CRM's standard phone fields or custom fields as configured.
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 |
|---|---|---|
| Providers queried per contact | One, whichever tool you bought | 15+ in a waterfall, stopping at the first verified result |
| Number types returned | Often switchboard or generic office | Direct dial and mobile prioritized, 85% direct dials |
| Do Not Call Registry screening | Obtained from the FTC directly | Not provided, the FTC licenses Registry access itself |
| Carrier type identification | Not typically available | Mobile, landline, VoIP classification included |
| Appending 1,000 contacts | The same lookup repeated 1,000 times, by hand | One CSV upload processed as a single job |
| Price visibility | Rep time, unbudgeted | 10 credits per phone number, quoted before the run |
See the difference in 2 minutes
Upload a CSV or connect your CRM. 30 free credits per month, no credit card required.
Do it once free. Do it at scale with Cleanlist.
The free tool above handles one-off checks. When you need to run whole lists with verification and enrichment across 15+ providers and a status on every row, Cleanlist scales with you. Start with 30 free credits, no card required.
Free
Try Cleanlist with no credit card. Great for testing the platform.
Free forever
Starter
For founders and small teams getting started with outbound.
billed annually · +$15/extra seat
Everything in Free, plus:
Pro
For sales teams scaling outbound campaigns and pipeline.
billed annually · +$15/extra seat
Everything in Starter, plus:
Scale
For growth teams running heavy enrichment at scale.
billed annually · +$15/extra seat
Everything in Pro, plus:
Compare every plan
| Feature | Free | Starter | Pro | Scale |
|---|---|---|---|---|
Data Enrichment | ||||
| Enrichment | ||||
| AI Search | ||||
| Chrome Extension | ||||
| CSV Upload | ||||
| Credit Rollover | ||||
Prospecting | ||||
| Find People | ||||
| Sales Navigator | ||||
| Manual Entry | ||||
| Export CSV | ||||
| Leads per List | 100 | 2,500 | 2,500 | Unlimited |
| Seats included | 1 | 2 | 5 | 10 |
| Additional seats | — | $20/seat | $20/seat | $20/seat |
Automation & AI | ||||
| AI Agents (Basic) | ||||
| AI Agents (Advanced) | ||||
| Playbooks | ||||
Integrations | ||||
| CRM Import | ||||
| CRM Integrations | ||||
| API Access | ||||
| Custom Integrations | ||||
| SSO / SAML | ||||
Support & Analytics | ||||
| Priority Support | ||||
| Analytics Dashboard | ||||
| Dedicated Success Manager | ||||
| Custom SLAs | ||||
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 append 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 should a phone append cost, and what is the coverage spec?
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Cleanlist charges 10 credits per phone number appended. A verified email costs 1 credit and a full contact record combining verified email, phone and company data costs 11, while searching costs 0 credits. The published coverage spec is 85% direct dials for B2B contacts. Coverage is always weaker on very small companies and in markets where fewer of the 15+ upstream providers operate, which is exactly why the waterfall queries several rather than trusting one. A free Cleanlist account includes 30 credits per month with no card, and paid plans are $79 per month for Starter with 1,500 credits, $229 for Pro with 5,000 and $599 for Scale with 15,000, with 25% off on annual billing.
Does Cleanlist check the Do Not Call (DNC) registry?
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No. Cleanlist does not screen appended numbers against the National Do Not Call Registry and returns no DNC status field. The FTC licenses Registry access directly to authorized sellers and telemarketers through telemarketing.donotcall.gov, so it is not something an enrichment vendor resells inside a data column. The FTC's guidance Complying with the Telemarketing Sales Rule states that the prohibition on calling numbers on the Registry does not apply to business to business calls. Teams whose calling program falls outside that exemption should obtain Registry access from the FTC and run the screen themselves. Cleanlist does not provide legal advice.
Can I append phone numbers to contacts that already have an email address?
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Yes, and this is the most common use case. Most B2B lead lists have email addresses but are missing phone numbers. Cleanlist uses the email address, name, and company data you already have to find the matching phone number. Having an email address significantly improves the phone match rate because it provides a strong signal for identity resolution.