# ExcelAPI, free: Phone validation API

> 様々な電話番号が存在し得る番号かを厳密に判定します。

ExcelAPI's FREE plan for the phone validation API costs $0.00 per 1,000 phones. We check each provider's docs for 9 fields. ExcelAPI's docs list 1: Validity.
You get up to 300,000 calls a month.
We haven't run ExcelAPI through [our phone validation API benchmark](https://datacircle.dev/best-phone-validation-api.txt) yet.
This plan is free. We rank 1,339 plans for phone validation APIs by price. Half the plans cost $2.867 or less per 1,000 phones. [297 phone validation API plans on our price sheet are free.](https://datacircle.dev/best-phone-validation-api.txt) [Trestle](https://datacircle.dev/validate-phone-apis/trestle/free/llms.txt) has a free plan with 25 calls in total. Trestle is the best phone validation API in our benchmark.
[Linq's $260 monthly plan](https://datacircle.dev/validate-phone-apis/linq/260-monthly-pro-post-v3-capability-check-imessage/llms.txt) is the cheapest paid plan per 1,000 phones. Linq's phone validation API costs nothing beyond the plan price. [Keyronne's pay-as-you-go plan](https://datacircle.dev/validate-phone-apis/keyronne/pay-as-you-go/llms.txt) costs the least for 10,000 phones a month: $0.20.
[Trestle](https://datacircle.dev/validate-phone-apis/trestle/top-up-from-10-self-serve-pay-as-you-go-get-3-0-phone-intel-phone-validation-api/llms.txt), [Signal House](https://datacircle.dev/validate-phone-apis/signal-house/top-up-from-10/llms.txt) and [Data247](https://datacircle.dev/validate-phone-apis/data247/12-pack-membership-get-v3-0-verify247-phone/llms.txt) are the best phone validation API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/validate-phone-apis/excelapi/free
- [Phone validation API in 2026: the best of 60+ compared](https://datacircle.dev/best-phone-validation-api.txt)
- Get it: https://excelapi.org/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Request: `GET https://api.excelapi.org/phone/ispossible`
- API key: not needed
- Its API docs: https://excelapi.org/docs/phone/ispossible?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Sold by: ExcelAPI (https://excelapi.org?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing)
- Checked: 2026-11-14

## In the answer

- Completeness: 11%
- Validity: ✓

## Price

- $ per 1,000 phones: $0.00
- Per: call
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: 62 other ExcelAPI calls

## Not found

- $ per 1,000 calls that find nothing: $0.00

## In their words

- Their pitch: 様々な電話番号が存在し得る番号かを厳密に判定します。

## Data

- Countries: Worldwide
- Keep data: no limit
- Use data: ユーザーは、当サービスの利用にあたり、以下の行為をしてはなりません。 当サービス、ほかのユーザー、またはその他第三者のサーバーまたはネットワークの機能を破壊したり、妨害したりする行為, 当サービスが提供する機能以外からの利用, 当サービスのサービスの運営を妨害するおそれのある行為, 不正アクセスをし、またはこれを試みる行為, 不正な目的を持って当サービスを利用する行為, その他、当サービスが不適切と判断する行為 [...] 当サービスは法人利用・商用利用に制限はありません。

## Plan

- Pay: ¥0
- Enough for: 300,000 calls a month

## Rate limit

- Per day: 10,000
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: number. Optional: country
- Method: GET
- Path: /phone/ispossible

## About the plan

- Plan: FREE
- Who can get it: anyone

## The only field the plan's answer can hold

valid

## ExcelAPI's plans (4)

- [ExcelAPI, free](https://datacircle.dev/validate-phone-apis/excelapi/free/llms.txt): $0.00 per 1,000, 11% complete
- [ExcelAPI, ¥4,400 monthly](https://datacircle.dev/validate-phone-apis/excelapi/4400-monthly/llms.txt): $0.0093 per 1,000, 11% complete
- [ExcelAPI, ¥44,000 monthly](https://datacircle.dev/validate-phone-apis/excelapi/44000-monthly/llms.txt): $0.0093 per 1,000, 11% complete
- [ExcelAPI, ¥110,000 monthly](https://datacircle.dev/validate-phone-apis/excelapi/110000-monthly/llms.txt): no limit, 11% complete

## ExcelAPI's calls for this API (1)

- `GET /phone/ispossible`: [ExcelAPI, free](https://datacircle.dev/validate-phone-apis/excelapi/free/llms.txt)

## ExcelAPI's APIs (4)

- [ExcelAPI Business verification API pricing, 4 plans](https://datacircle.dev/business-verification-apis/excelapi/free/llms.txt)
- [ExcelAPI Company headcount API pricing, 4 plans](https://datacircle.dev/company-headcount-apis/excelapi/free/llms.txt)
- [ExcelAPI Phone validation API pricing, 4 plans](https://datacircle.dev/validate-phone-apis/excelapi/free/llms.txt)
- [ExcelAPI Company enrichment API pricing, 4 plans, GET /company/address](https://datacircle.dev/company-enrichment-apis/excelapi/free-get-company-address/llms.txt)
- [ExcelAPI Company enrichment API pricing, 4 plans, GET /company/capital_stock](https://datacircle.dev/company-enrichment-apis/excelapi/free-get-company-capital-stock/llms.txt)
- [ExcelAPI Company enrichment API pricing, 4 plans, GET /company/name](https://datacircle.dev/company-enrichment-apis/excelapi/free-get-company-name/llms.txt)
- [ExcelAPI Company enrichment API pricing, 4 plans, GET /company/name_kana](https://datacircle.dev/company-enrichment-apis/excelapi/free-get-company-name-kana/llms.txt)
- [ExcelAPI Company enrichment API pricing, 4 plans, GET /company/net_assets](https://datacircle.dev/company-enrichment-apis/excelapi/free-get-company-net-assets/llms.txt)
- [ExcelAPI Company enrichment API pricing, 4 plans, GET /company/net_income](https://datacircle.dev/company-enrichment-apis/excelapi/free-get-company-net-income/llms.txt)
- [ExcelAPI Company enrichment API pricing, 4 plans, GET /company/net_sales](https://datacircle.dev/company-enrichment-apis/excelapi/free-get-company-net-sales/llms.txt)
- [ExcelAPI Company enrichment API pricing, 4 plans, GET /company/ordinary_income](https://datacircle.dev/company-enrichment-apis/excelapi/free-get-company-ordinary-income/llms.txt)
- [ExcelAPI Company enrichment API pricing, 4 plans, GET /company/zipcode](https://datacircle.dev/company-enrichment-apis/excelapi/free-get-company-zipcode/llms.txt)
- [ExcelAPI Company enrichment API pricing, 4 plans, GET /company/total_assets](https://datacircle.dev/company-enrichment-apis/excelapi/free-get-company-total-assets/llms.txt)
- [ExcelAPI Company enrichment API pricing, 4 plans, GET /company/url](https://datacircle.dev/company-enrichment-apis/excelapi/free-get-company-url/llms.txt)
- [ExcelAPI Company enrichment API pricing, 4 plans, GET /company/invoice_leaveDate](https://datacircle.dev/company-enrichment-apis/excelapi/free-get-company-invoice-leavedate/llms.txt)
- [ExcelAPI Company enrichment API pricing, 4 plans, GET /company/invoice_address](https://datacircle.dev/company-enrichment-apis/excelapi/free-get-company-invoice-address/llms.txt)
- [ExcelAPI Company enrichment API pricing, 4 plans, GET /company/invoice_name](https://datacircle.dev/company-enrichment-apis/excelapi/free-get-company-invoice-name/llms.txt)
- [ExcelAPI Company enrichment API pricing, 4 plans, GET /company/invoice_registrationDate](https://datacircle.dev/company-enrichment-apis/excelapi/free-get-company-invoice-registrationdate/llms.txt)
- [ExcelAPI Company enrichment API pricing, 4 plans, GET /company/invoice_check](https://datacircle.dev/company-enrichment-apis/excelapi/free-get-company-invoice-check/llms.txt)
- [ExcelAPI Company enrichment API pricing, 4 plans, GET /company/invoice_tradename](https://datacircle.dev/company-enrichment-apis/excelapi/free-get-company-invoice-tradename/llms.txt)
- [ExcelAPI Company enrichment API pricing, 4 plans, GET /company/invoice_updateDate](https://datacircle.dev/company-enrichment-apis/excelapi/free-get-company-invoice-updatedate/llms.txt)

## ExcelAPI: phone validation API alternatives

[ExcelAPI alternatives: other phone validation API providers by price](https://datacircle.dev/excelapi-alternatives.txt)

We list ExcelAPI's cheapest paid plan first. Next we list other providers' plans closest to ExcelAPI in price per 1,000 phones. We also show the Keyronne plan. Its price is farther from the price of ExcelAPI's cheapest paid plan.

- [ExcelAPI, ¥4,400 monthly](https://datacircle.dev/validate-phone-apis/excelapi/4400-monthly/llms.txt): $0.0093 per 1,000, 11% complete
- [Botoi, $199 monthly](https://datacircle.dev/validate-phone-apis/botoi/199-monthly/llms.txt): $0.0066 per 1,000, 44% complete, stored
- [Neutrino API, $250 monthly](https://datacircle.dev/validate-phone-apis/neutrino-api/250-monthly/llms.txt): $0.0083 per 1,000, 67% complete, stored
- [ReefAPI, $450 quarterly, Enterprise quarterly, POST /phone-validate/v1/batch](https://datacircle.dev/validate-phone-apis/reefapi/450-quarterly-enterprise-quarterly-post-phone-validate-v1-batch/llms.txt): $0.01 per 1,000, 67% complete, stored
- [ParseAPI, $100 monthly, Pro, GET /phone/{number}](https://datacircle.dev/validate-phone-apis/parseapi/100-monthly-pro-get-phone-number/llms.txt): $0.01 per 1,000, 56% complete, stored
- [Keyronne, pay as you go](https://datacircle.dev/validate-phone-apis/keyronne/pay-as-you-go/llms.txt): $0.02 per 1,000, 44% complete

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-14.

- https://excelapi.org?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://excelapi.org/docs/phone/ispossible?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://excelapi.org/faq?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://excelapi.org/furikomi-plan?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://excelapi.org/plan-detail?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://excelapi.org/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://excelapi.org/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing