---
title: "Bulk Phone Number Validator & CSV Normalizer"
---

Bulk Phone Number Validator & CSV Normalizer: SMSRiver

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- Bulk Phone Validator

Batch Data Normalization

# Bulk Phone Number Validator & CSV Cleanup

Clean, normalize, and validate lists of phone numbers into canonical E.164 format. Detect country prefixes, classify mobile vs landline vs VoIP lines, remove malformed entries, and export clean datasets.

Quick Actions:

Load Sample Test Batch (12 Numbers)

Clear Input

Phone Numbers (Paste list, one per line or comma-separated)

Up to 100 numbers per batch

Default Country (Fallback when country code is omitted)

Australia (+61)

Austria (+43)

Belgium (+32)

Brazil (+55)

Canada (+1)

France (+33)

Germany (+49)

India (+91)

Indonesia (+62)

Ireland (+353)

Italy (+39)

Japan (+81)

Mexico (+52)

Netherlands (+31)

Philippines (+63)

Poland (+48)

Singapore (+65)

South Africa (+27)

South Korea (+82)

Spain (+34)

Sweden (+46)

Switzerland (+41)

United Kingdom (+44)

United States (+1)

Or Upload File (.csv, .txt)

Validate & Normalize Batch

Processes up to 100 entries instantly

Important Technical Distinction: Numbering-Plan Format vs. Active Reachability

Validation confirms that a phone number adheres to international and domestic numbering rules (ITU-T E.164, NANPA, Ofcom, BNetzA). Format validity does not guarantee that a number is currently assigned to an active subscriber or reachable on live radio networks.

Automate in CI/CD & Workflows

### Need to validate thousands of numbers programmatically?

Integrate the SMSRiver Phone Lookup REST API into your signup flow, CRM, or data pipelines. Normalize numbers, verify carriers, and filter VoIP lines with single-digit millisecond latency.

[Explore Lookup API](/developer/phone-lookup-api/)
[Open Workbench](/workbench/)

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Public numbers·Live inboxes·Developer tools

Public Inboxes

- [United States (+1)](/receive-sms/us/)

- [United Kingdom (+44)](/receive-sms/gb/)

- [Canada (+1)](/receive-sms/ca/)

- [Philippines (+63)](/receive-sms/ph/)

- [Germany (+49)](/receive-sms/de/)

Developer & Tools

- [SMS Debugging Workbench](/workbench/)

- [Phone Number Inspector](/tools/phone-number-inspector/)

- [Bulk Phone Validator](/tools/bulk-phone-validator/)

- [Phone Lookup API](/developer/phone-lookup-api/)

- [E.164 Phone Formatter](/tools/phone-number-formatter/)

- [SMS Segment Calculator](/tools/sms-segment-calculator/)

- [Webhook Validator](/tools/webhook-payload-validator/)

Guides & Trust

- [Country Calling Codes](/country-codes/)

- [Troubleshooting Hub](/troubleshooting/)

- [Carrier Comparisons](/compare/)

- [Developer Reference](/developer/)

- [OpenAPI Specification](/openapi.json)

- [MCP Tools Manifest](/.well-known/mcp.json)

- [Privacy & Security Guides](/guides/)

- [Engineering Articles](/articles/)

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