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1Lookup

Checks phone numbers against carrier and do-not-call data and verifies emails, IPs and domains through a single API.
VoiceUsage-based pricingFree tier
1lookup.io ↗XLinkedInYouTubeFacebook
AlternativesSet it up for my teamIs 1Lookup yours? Claim the card →
At a glanceswept Oct 14, 2026

≈ 18.9kvisits/mo

Use not read yet · estimate, read Oct 14, 2026

For
Teams that need to validate phone, email and IP data for outreach, prospecting or fraud checks
Price
From $99/mopricing page, read Oct 15, 2026Trial & discounts: 7-day free trial
Activity
Actively maintainedsite updated 2 days ago
Company
1Lookup Inc. · since 2025privacy policy · per their About page
Runs as
API
Used for
  • verify phone numbers for line status and risk
  • check whether email addresses are deliverable
  • detect VPN and proxy traffic on logins
read off 1lookup.io on Oct 15, 2026
Worth knowingcomputed from what we read · each with its source
Pricingpricing page, read Oct 15, 2026

From $99/mo

Trial & discounts 7-day free trial

pricing page

The companyeach fact with its source · read Oct 15, 2026
Your datawhat they publish, each line with its page · read Oct 15, 2026

“The content is not retained by us or used to train models.”

privacy policy ↗

These are 1Lookup's own statements, read from its pages. We did not audit them. A line that is missing was not found on the pages we read; it does not mean the practice is absent.

How a program reaches itfound, not claimed · read Oct 15, 2026
  • MCP serverio.1lookup/1lookupverified in the MCP registry
  • Stateanswers, requires sign-inchecked 2026-10-15
  • Address to connectapp.1lookup.io/api/mcp
  • OpenAPI spec42 pathsthe spec ↗
  • API docsapp.1lookup.io/apithe vendor's page ↗
  • MCP docs1lookup.io/products/mcpthe vendor's page ↗

MCP server details →

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.

Alternatives in Voiceby use, among tools still maintained

Figure and bar: visits/mo, estimate · year: online since

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Questions this page answers
  • What is 1Lookup?

    Checks phone numbers against carrier and do-not-call data and verifies emails, IPs and domains through a single API. It is listed in the Atlas under Voice and made by 1Lookup Inc.

  • Who is 1Lookup for?

    Teams that need to validate phone, email and IP data for outreach, prospecting or fraud checks

  • How much does 1Lookup cost?

    Paid plans start at $99/mo, per 1Lookup's pricing page on 2026-10-15.

  • Is 1Lookup free?

    No. Its pricing page showed no free plan on 2026-10-15.

  • Is 1Lookup still maintained?

    Actively maintained: site updated 2 days ago.

  • Who owns 1Lookup?

    1Lookup is run by 1Lookup Inc., per its privacy policy (2026-10-15).

  • Does 1Lookup train AI on your data?

    No, per its privacy policy (2026-10-15): “The content is not retained by us or used to train models.”

  • Is 1Lookup safe?

    We do not audit vendors. What 1Lookup publishes, read 2026-10-15: GDPR, PCI DSS, CCPA stated on its security page; on training with your data, “The content is not retained by us or used to train models.”.

  • Does 1Lookup have a free trial?

    Yes, a 7-day free trial, per its pricing page (2026-10-15).

  • How do I cancel 1Lookup?

    In its own words (terms of service, 2026-10-15): “You may cancel at any time from your account settings or by contacting us.”

  • Does 1Lookup give refunds?

    In its own words (terms of service, 2026-10-15): “Amounts charged under this Section are non-refundable and are not eligible for any refund, credit, or proration under these Terms or any refund policy.”

  • What are alternatives to 1Lookup?

    In Voice, by use: IllyVoIP V2, MobileValidate, Cheap international calls from your browser, Snipget, HappyScribe, ElevenLabs.

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How we read a tool

No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.

  • Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
  • Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
  • Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
  • The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.

How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.