Bulk phone number cleaner
Phone numbers arrive from forms and spreadsheets in every format a person can invent. This converts them to one canonical international form and separates the ones no numbering plan allows.
Free, no signup, no daily limit. We do not store what you check here.
Why one format, and why E.164
E.164 is the form every carrier and messaging API agrees on: a plus, the country code, the national number, no punctuation. Storing anything else means every consumer of that data invents its own parsing, and they disagree at the edges — leading zeros, spaces, brackets, and the national trunk prefix that must be dropped when the country code is added. Normalising once at the boundary is cheaper than parsing repeatedly forever.
A number without a country code is a guess
The same digits are valid in several countries and mean different things in each. A local-format number can only be normalised if you know which country it came from, and assuming one produces confident, wrong output — which is worse than a rejection, because nothing downstream knows to doubt it. Numbers here that lack a country code are reported as unparseable rather than guessed at.
Questions
What happens to numbers I cannot parse?
They are listed separately rather than dropped or guessed at. Usually they are missing a country code, which is information no tool can invent.
Does a number surviving this mean it works?
No. It means the numbering plan allows it. Whether a handset answers is a network question, and it is the one that costs money to ask.
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When you need more than a free tool
This page answers what can be determined offline and from public DNS. The API adds live carrier and mailbox verification, a calibrated confidence score, and the full evidence trail behind every verdict.
Credits never expire. Inconclusive verdicts are never billed. Cancel in one call. See pricing or read the docs.