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Deepline’s phone waterfall detects the contact’s region and routes to the right providers automatically. No need to choose between regional templates — just describe who you need phone numbers for and Deepline handles routing. Coverage varies by region and input quality. The waterfall tries multiple providers in sequence, validates each result for mobile type (filtering out landlines), and returns the first valid mobile number with country code. You only pay for providers that ran. B2B data decays at roughly 22.5% per year (HubSpot via Cognism), so multi-provider coverage helps you reach contacts even when one provider’s data is stale.

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How do I find mobile phone numbers with Claude Code?

In Claude Code, type:
With Codex:

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What does the phone number waterfall do step by step?

The phone waterfall detects the contact’s region, routes to the right providers, validates each number for mobile type, and returns the first valid mobile number with country code. Cheapest provider runs first; the waterfall stops on the first valid hit.
1

Detect contact region

Deepline infers region from company domain, address, or country fields in your data.
2

Route to region-optimized providers

The right providers fire based on region — no need to pick a regional template.
3

Validate phone number

Returned numbers are validated for format and mobile type (filtering out landlines).
4

Return mobile number

The first valid mobile number is returned with country code.

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Which providers does the phone waterfall use?

The phone waterfall uses 3 providers: enrich_phone_finder, Dropleads mobile-finder, and LeadMagic mobile-finder. Deepline analyzes domain TLD, address fields, and country codes to pick the right provider configuration.
Phone number find rates vary significantly by region. US/Canada and Western Europe usually have stronger coverage. APAC and LATAM coverage is lower.
Related tasks: Find Work Email | Find Decision Makers | Find LinkedIn Profile

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Frequently Asked Questions

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How much does it cost to find a mobile phone number with Deepline?

Phone lookups cost more than email lookups because phone data is more expensive across all providers. You only pay for providers that ran — most lookups resolve on the first or second provider. Expect 1-5 credits per phone lookup depending on the provider chain for the detected region, compared to 0.3-0.4 credits for a typical email waterfall.

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Can I find phone numbers in bulk from a CSV?

Yes. type /deepline-gtm find mobile numbers for leads.csv and Deepline reads your column headers, detects regions for each contact, and enriches every row with the appropriate provider chain. Always pilot with 3-5 rows first to verify coverage for your target regions.

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What data do I need to find a mobile phone number?

For the best results, provide first name, last name, company name, and domain. Deepline uses these to both identify the contact and detect their region. If you have a LinkedIn URL, that can also help resolve the contact’s identity before the phone lookup.

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How accurate is mobile phone number lookup?

Deepline filters out landlines and validates phone number format before returning results. Hit rates vary by region: in our testing, US/Canada and Western Europe reach stronger coverage, while APAC and LATAM are lower. Single-provider enrichment commonly leaves coverage gaps. Waterfall enrichment improves match rates by querying multiple providers in sequence. Specific lift varies by ICP and region..

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Why use Deepline for finding mobile phone numbers?

Deepline detects region automatically from your data — no need to segment lists by geography or pick regional templates. Ask for phone numbers from your IDE or terminal and Deepline routes to the right providers. Since it runs in your coding environment, phone enrichment chains directly into larger automation pipelines.