Stop paying to call dead numbers and email dead inboxes.

One API key checks phone numbers, email addresses and IP addresses. Live carrier data, not prefix tables. You pay only for lookups that return an answer, from half a cent each.

Start free with 1,000 lookups API docs

Try it now, no account needed:

US and Canada numbers return full detail. International numbers return validity and country. No signup. 20 free checks a minute.

Three checks, one credit

Phone

Valid, line type (mobile, landline, VoIP), current carrier from the portability database, rate center, caller name, LRN and OCN.

Email

Syntax, MX, disposable providers, role accounts, free providers, and mailbox-level SMTP checks where the receiving server allows them.

IP

Country, city, timezone, ISP and ASN, plus datacenter, proxy, VPN and Tor flags.

DNS

MX, SPF, DMARC and DKIM checks with plain-English issues, for deliverability teams.

Why teams switch

Success-only billing

An invalid number, a dead domain or a private IP costs zero credits. You pay for answers, not attempts.

One key, one balance

Phone, email, IP and DNS draw from the same credit pool. No separate vendors, no separate invoices.

Live carrier data

Ported numbers show their current carrier because we query the routing database, not a prefix table from last year.

Built for agents

An MCP server that Claude, Cursor and n8n can call directly. Paste one URL, add your key.

Pricing

Starter

$99/mo
  • 20,000 credits
  • $0.0050 per lookup
  • Agencies, freelancers, side projects

Growth

$299/mo
  • 85,000 credits
  • $0.0035 per lookup
  • Growing SaaS and lead-gen teams

Professional

$799/mo
  • 250,000 credits
  • $0.0032 per lookup
  • High-volume apps and dialers

Enterprise

$1999/mo
  • 1,000,000 credits
  • $0.0020 per lookup
  • Platforms and data resellers

Every plan starts with a 7-day trial and 1,000 free credits. No contract. Full pricing.

Free tools

Phone Number Lookup

Look up any US or Canadian phone number for free.

Reverse Phone Lookup

Find out what kind of number just called you.

Carrier Lookup

Check which carrier a phone number is on right now, including ported numbers.

VoIP Number Check

Check whether a phone number is a VoIP line, a mobile or a landline.

Number Portability Check

Check whether a phone number has been ported to a different carrier.

Email Verifier

Verify any email address for free.

Disposable Email Checker

Check whether an email address uses a disposable or temporary inbox provider.

MX Lookup

Look up the MX records for any domain.

SPF Checker

Check a domain's SPF record for free.

DMARC Checker

Check a domain's DMARC record for free.

DKIM Checker

Check a DKIM record for free.

IP Lookup

Look up any IPv4 or IPv6 address for free.

VPN and Proxy Check

Check whether an IP address is a VPN, proxy, Tor exit or datacenter for free.

Area Code Lookup

Look up any US or Canadian area code.

Compare

Honest side-by-sides with the tools you are probably using now.

LookupLab vs Twilio LookupLookupLab vs NumverifyLookupLab vs IPQualityScoreLookupLab vs ZeroBounceLookupLab vs NeverBounceLookupLab vs Hunter Email VerifierLookupLab vs Abstract APILookupLab vs ipapiLookupLab vs IPinfoLookupLab vs KickboxLookupLab vs MillionVerifier

Same check, in your code

One API key, one credit pool, 1,000 free lookups to start. Phone, email, IP and DNS checks from a single endpoint, and you only pay for lookups that return an answer.

Start free Read the docs