Validate International Phone Numbers in two minutes
International phone data is a formatting minefield — country codes, trunk prefixes and local conventions vary everywhere, and a number that looks wrong is often just formatted for a different country. Validating across borders normalises every number and tells you which ones are actually reachable.
What's hiding in your list
The same digits can be valid in one country and meaningless in another, so format-only checks produce false positives and negatives.
Missing or doubled country codes are common in exported lists, breaking dialers and SMS gateways that expect E.164.
Line-type and carrier conventions differ by country, so a one-size check misjudges which numbers are textable.
Email and phone — cleaned in one pass
Verify in one pass
Every email checked for deliverability and every phone validated — in a single upload.
Catch what others miss
Typos, catch-all domains, disposable addresses, dead numbers and silent duplicates.
Flat, simple pricing
Validate numbers across 30+ countries in one pass. No per-credit math, no surprise overage bills.
Clean leads in three steps
No setup, no integrations, no learning curve. Upload a file, download a better one.
Upload your CSV
Drag in any contact list. We auto-detect email, phone, name and company columns.
We verify everything
Every email checked for deliverability, every phone validated, duplicates flagged — with a live quality score.
Download clean leads
Export a verified, deduplicated list your team can actually call and email.
Email and phone, cleaned in a single upload — see exactly how many bad contacts are hiding in your list before you pay a cent.
100 free verifications · no credit card · results in under 2 minutes
Frequently asked
How many countries does BounceBlock support?
Phone validation covers 30+ countries, normalising each number to E.164 and returning line type and carrier where available.
Does it fix missing country codes?
It flags malformed and ambiguous numbers and normalises formatting so your dialer and SMS tools receive consistent E.164 values.
Can I validate a mixed-country list at once?
Yes — upload the whole list and each number is validated against the right country's conventions in a single pass.
Stop wasting hours on dead leads.
Upload your list and see how clean it really is — free, in under two minutes.