Phone Number Validator: Free Single Checks and Bulk List Validation

Cleanlist achieves 98% email accuracy through real-time verification and cross-referencing across 15+ data providers. Every record is validated before delivery.

Every new account starts with 30 free credits. Each credit processes one record (enrichment, verification, or lookup). No credit card required to start.

Cleanlist uses waterfall enrichment across 15+ providers including major B2B data sources. The system automatically selects the best provider for each record to maximize match rates.

Yes. Cleanlist integrates with HubSpot, Salesforce, and other CRMs. Enriched data syncs back automatically. You can also upload CSV files or use the REST API.

Most jobs complete in under 2 minutes for up to 10,000 records. Larger files are processed in batches with progress updates.

A valid number checker is a tool that decides whether a string of digits could be a working phone number under the rules of its country, and Cleanlist gives you one free on this page. It normalizes the input to E.164, identifies the country from the dialing prefix, and confirms the national portion has a legal length. In the United States and Canada the rule comes from the North American Numbering Plan, which the Canadian Numbering Administrator states is ten digits in the format NXX-NXX-XXXX, where N is any digit 2 through 9 and X is any digit 0 through 9. That single rule rejects a large share of junk, because an area code or central office code starting with 0 or 1 cannot be assigned. What it proves is that the number could exist, not that it reaches your prospect.

A phone number verifier checks status where a validator checks structure. Cleanlist's free checker on this page is the validator half: correct country code, legal length, normalized E.164 form, which ITU-T Recommendation E.164 caps at fifteen digits. A verifier goes to a network and asks whether the line is assigned and active today, usually through an HLR lookup against the mobile operator's Home Location Register or an equivalent carrier record. Those answer different questions at very different prices, so validation runs first. Where Cleanlist puts its paid effort on a stale list is enrichment: taking the contact behind a dead number and sourcing their current direct dial or mobile across 15+ data providers at 10 credits per phone number.

Validate a US phone number against the North American Numbering Plan rather than against a generic ten digit rule. The Canadian Numbering Administrator, which publishes the plan alongside NANPA, states that NANP numbers are ten digits in the format NXX-NXX-XXXX, where N is any digit 2 through 9 and X is any digit 0 through 9. So an area code or central office code beginning with 0 or 1 fails immediately. One more thing catches people out: NANPA states the plan covers the United States and its territories, Canada, and some Caribbean countries, so a +1 number is not automatically American. Cleanlist's free checker applies the country and length test in your browser and flags North American toll-free ranges, which are 800, 888, 877, 866, 855, 844 and 833.

Most fake phone numbers fail one of three structural tests, and Cleanlist's free checker runs all three. First, assignability: under the North American Numbering Plan an area code or central office code starting with 0 or 1 cannot exist. Second, reserved ranges: NANPA states that the fictitious, non-working numbers 555-0100 through 555-0199 remain reserved for entertainment and advertising, which is why the numbers in films never connect and why they show up constantly in form submissions. Third, length: ITU-T Recommendation E.164 caps an international number at fifteen digits, so anything longer is not a phone number at all. What structure cannot catch is a real, well formed number given by someone who simply did not want to be reached.

Knowing whether a number is wireless is a compliance input before it is a productivity one, so treat it as its own check. The FCC's TCPA rule at 47 CFR 64.1200(a)(1)(iii) restricts autodialed and artificial or prerecorded calls to any telephone number assigned to a paging service, cellular telephone service, specialized mobile radio service, or other radio common carrier service. In the United Kingdom, Germany, France and Australia the numbering plan reserves separate ranges for mobile, so the prefix answers the question. The North American Numbering Plan does not, which is why Cleanlist's free checker labels North American line type as a heuristic rather than a fact. Manually dialed business to business calls sit outside that specific prohibition. Confirm your own program with counsel.

You usually cannot tell from the digits, because VoIP providers hand out ordinary geographic numbers from the same ranges landlines use. The exception in North America is the 5XX range. NANPA states that 5XX-NXX codes are to be used for applications which are non-geographic in nature and are not assigned to rate centers, covering fixed and mobile devices including unattended machines, and Cleanlist's free checker flags those separately. Everything else needs a carrier record to resolve. For a sales team the practical consequence is simple: a non-geographic or virtual number is a weaker long term contact point than a personal direct dial, so it is a candidate for re-sourcing rather than for a fourth dial attempt.

No structural check can tell you whether a phone number is still in service, and any tool claiming to do it from the digits alone is guessing. Validation proves a number is legal under its country's numbering plan. Whether it rings today depends on facts held by the carrier and the subscriber. The scale of that churn is why it matters: the FCC put it at upwards of 35 million US numbers disconnected and made available for reassignment each year in the 2018 order that created the Reassigned Numbers Database, and its rules allow reassignment after a 45 day aging period. That Database, at reassigned.us, takes monthly submissions of permanently disconnected numbers from service providers and is licensed separately from any enrichment product.

Phone number cleansing is the work of turning a raw list of numbers into one a dialer can trust: one consistent format, no impossible numbers, and a current number for each contact who still matters. Cleanlist does it in the order that costs least. Normalization to E.164 and numbering-plan checks come first and cost nothing, so malformed and impossible rows leave before a credit is spent. Enrichment comes second at 10 credits per phone number, and that is where a contact whose number is dead gets a current direct dial or mobile sourced across 15+ data providers. Deduplication and column standardization sit alongside both. Phone number cleaning, phone list hygiene, and phone data scrubbing all describe the same job.

The phrase covers two unrelated products and buyers land on the wrong one constantly. In B2B sales operations, a phone number verification service cleans a list you already own so a dialer is not fed numbers that no longer reach anyone. In consumer software and fintech, phone verification means sending a one time passcode by SMS to prove a user controls a handset at signup. Cleanlist is the first kind. Cleanlist does not send SMS, does not issue one time passcodes, does not supply numbers for receiving verification codes, and does not generate phone numbers. If you need to receive an SMS code, a messaging provider such as Twilio or Vonage is the category. If you need a sales team to stop dialing dead numbers, keep reading.

Yes, within a defined set. Cleanlist's free checker recognizes 25 dialing codes and tests the national portion against the expected length for each: the United States and Canada, the United Kingdom, Ireland, France, Germany, Spain, Italy, Portugal, the Netherlands, Belgium, Switzerland, Austria, Sweden, Norway, Denmark, Australia, New Zealand, Japan, China, India, Singapore, Brazil, Mexico, South Africa and the United Arab Emirates. Results come back in E.164, the ITU-T international format capped at fifteen digits. A number whose prefix falls outside that set is returned as unrecognized rather than passed as valid, which is deliberate, since guessing a country is worse than saying so. Provider coverage for sourcing a current number also varies by market and is strongest in North America and Western Europe.

Give Cleanlist the person, not the number, and let the waterfall find it. Start from a full name plus a company domain, a work email address, or a LinkedIn URL, then run enrichment and Cleanlist queries 15+ data providers in sequence until one returns a phone number. A phone number costs 10 credits and a full contact record with the verified email included costs 11. The company-stated product spec is 85% direct dials. Cleanlist does not own a contact database, so what comes back is the best answer available across the provider cascade on the day you ask, which is also why re-running a stale record is the dependable way to refresh it. Free accounts include 30 credits a month with no credit card.

Cleanlist treats a mobile and a direct dial as the same request: enrich the contact, return the best phone number the provider cascade holds for that person. There is no mobile-only lookup and no filter that guarantees a mobile, because which number type comes back depends on which provider matched the person. That distinction matters for compliance more than for convenience, since the FCC's rule at 47 CFR 64.1200(a)(1)(iii) attaches restrictions to autodialed and prerecorded calls placed to numbers assigned to cellular service. If a dialing program depends on knowing wireless status per row, run that as its own check rather than assuming an enrichment result settles it. Phone enrichment costs 10 credits, and search costs nothing.

No. Cleanlist is a B2B enrichment platform built to resolve business contact data for a named person at a named company, for sales and marketing teams. It is not a people finder, not a reverse phone lookup, and not a way to identify who owns an unknown number. Searches that start from a phone number and try to reach a private individual, a family member, or an unknown caller sit outside what Cleanlist does and outside what its data providers are licensed for. Consumer people-search services exist for that and operate under a different set of rules. If your list is business contacts and the result has to land in a CRM afterwards, Cleanlist is the right category.

Sourcing business contact data and calling it are two separate legal questions, and only the second one is heavily regulated. Cleanlist obtains business contact data through licensed third-party data providers rather than by scraping, and it supports data subject access and erasure requests. On the calling side, the FTC's Telemarketing Sales Rule exempts, at 16 CFR 310.6(b)(7), telephone calls between a telemarketer and any business to induce the purchase of goods or services or a charitable contribution by the business, with the disclosure requirements at 310.3(a)(2) and 310.3(a)(4) still applying and a carve-out that removes the exemption for sellers of nondurable office or cleaning supplies. Cleanlist supplies B2B research data and does not provide legal advice.

Structural validation on 1,000 numbers costs nothing at Cleanlist, at any volume, because it is arithmetic against a published numbering plan. The cost sits in the rows you actually want a current number for. Phone enrichment is 10 credits per number, so re-sourcing all 1,000 comes to 10,000 credits, and a full contact record with the verified email included is 11 credits per row. As of 7 August 2026, plans are Starter at $79 a month, Pro at $229 and Scale at $599, each 25% cheaper billed annually, and the free tier includes 30 credits a month with no credit card. A sale is running until 31 August 2026: code 33FOREVER takes 33% off for life for new customers. Search costs 0 credits.

No. Nothing Cleanlist does rings a phone. The checker on this page runs entirely in your browser and never touches a network. Enrichment queries data providers about the contact record, not the handset, so the person whose number you are checking receives no call, no SMS, and no notification of any kind. That is worth stating plainly, because some phone validation categories do reach the network, and buyers reasonably want to know whether a hygiene step will announce itself to a prospect before a rep has said a word. It will not. Placing the call is still the only definitive proof a number is live, and it is also the expensive one, which is the whole reason a cheap structural filter runs first.

Developer phone validation APIs such as Twilio Lookup, IPQualityScore and Messente are built to sit inside an application and format or score a number at the moment a user types it. They are priced per lookup and they assume an engineer. Cleanlist is built for the other job: a sales or revenue operations team holding a spreadsheet of contacts and a dialer that needs feeding. The unit of work is a list rather than a request, and the output is a CSV or a CRM sync rather than a JSON response. The two overlap on structural checking, which is why the checker on this page is free and needs no account. They diverge on the paid step, because Cleanlist's is finding the contact's current number rather than scoring the old one.