B2B sales lead list calculator
For B2B sales and SDR teams that cold call or text prospects: estimate how much of a prospect list has a reachable phone number, and what the dead and landline numbers cost in wasted dials and texts. Every rate is editable; nothing is stored.
Why B2B prospect lists go bad
- People change jobs, and the direct line tied to their old desk can be disconnected or handed to someone else.
- Companies move, close or switch phone systems, which can retire the numbers on an older list.
- Purchased and scraped contact data can sit for months before a rep works it.
- Lists mix company main lines and desk phones in with cell phones, and most landlines cannot receive texts.
How to get your real numbers
- Pull a random sample of 500 to 1,000 numbers from your prospect list.
- Validate it against live carrier data (TrueSearch for Business does this in about 30 seconds per 1,000).
- Enter the dead, landline and VoIP percentages you get back above.
- Repeat per data source to see which providers send the most unreachable numbers.
See the lead generation list calculator, check calling windows with the free calling hours checker, check single numbers with the free carrier lookup, or read about cold calling list cleaning.
Start 3-day free trialQuestions
Are the default rates typical for B2B prospect lists?
No. They are editable placeholders, not industry statistics. Bad-number rates depend on the data source and how old the list is. Validate a sample of your own list and enter what you find.
Can I clean a prospect list exported from my CRM or data provider?
Yes. Upload the CSV to TrueSearch for Business and download it back with each number marked valid or dead, with its line type (mobile, landline, VoIP or toll-free) and carrier, so your reps can drop dead numbers before they dial.
Can it tell me whether a contact still works at the company?
No. TrueSearch checks the phone number, not the person. A number can be live and still belong to someone who has left the company, so a valid result means the line works, not that your contact will answer it.
Does this check Do Not Call, consent or litigator lists?
No. The calculator only estimates reachability, and TrueSearch for Business checks validity, line type and carrier. It does not verify consent and does not scrub against Do Not Call registries or litigator lists. Use your consent records and the official National Do Not Call Registry (donotcall.gov) for that.
This guide is general information, not legal advice. TrueSearch for Business checks validity, line type and carrier from licensed telecom data. It does not check the National Do Not Call Registry, state DNC lists or the FCC Reassigned Numbers Database. Not a consumer reporting agency; not for FCRA purposes.