Check your list before you call.
Paste US phone numbers and emails. Get your first 25 checks free. Paste US phone numbers and emails. We'll show which are valid and which are on a do-not-call list. Get your first 25 checks free.
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Free
CSV upload with any pack
99.9%
<2s
170+
Built for people who live on the phone.
Fewer dead dials.
Reps spend their day on numbers that ring, not on disconnected lines and bad leads.
Cleaner lists, fewer refunds.
Check every lead before it reaches a client, and stand behind what you deliver.
No surprise lawsuits.
Know which numbers are tied to serial lawsuit filers before anyone makes the call.
Know what every number and email tells you.
Phone
- TCPA risk
- Flags numbers tied to serial lawsuit filers, before you dial.
- Line type
- Mobile, landline, VoIP or disconnected.
- Carrier
- Who runs the line, and whether it moved to a new carrier.
- Activity score
- How alive the line is, from 0 to 100. Under 30 is likely dead.
- Spam score
- How likely carriers have flagged it, from 0 to 100.
- Caller ID
- The name registered to the number.
- DNC status
- Whether it is on the Do Not Call registry.
- Location
- State and local time zone.
- Deliverability
- Whether a message will actually reach the inbox.
- Domain check
- Confirms the domain is set up to receive email.
- Live inbox check
- Asks the mail server if the address exists.
- Throwaway detection
- Flags disposable addresses like temp mail.
TCPA compliance
One wrong number costs $1,500.
We flag numbers tied to serial lawsuit filers before you dial. One bad call can mean a $500 to $1,500 judgment per violation.
Check your list- 01
Upload your list
Paste numbers or emails, or drop a CSV. Any format works.
- 02
We verify in real time
Phone numbers are checked against live carrier data. Emails are checked for a real, working mailbox.
- 03
Get actionable results
Mobile, landline, VoIP or disconnected, plus deliverability scores, spam risk and lawsuit-risk flags for every entry.
Pay once. Checks never expire.
Starter
$69
- 1,000 checks, never expire
- CSV upload and download
- All data fields
- API access
- Priority support
Growth
Most popular$229 once
4,000 checks · $0.057 each
- 4,000 checks, never expire
- CSV upload and download
- All data fields
- API access
- Priority support
Scale
$649
- 12,500 checks, never expire
- CSV upload and download
- All data fields
- API access
- Priority support
The first 30 seconds tell you everything.
lineverify / verifying 5 of 5
+1 (415) 555-0189
Mobile · Verizon
Safe to call
hello@founder.io
Deliverable
Valid mailbox
+1 (646) 555-0142
Landline · Frontier
Do not call
noreply@temp.cc
Risky
Throwaway
+1 (718) 555-0199
Mobile · T-Mobile
Lawsuit risk
847
bad numbers removed before a campaign launch.
3
serial lawsuit filers flagged in a list of 800.
12 min
to verify 500 records. Not 12 days.