# Number Portability Lookup, free: Phone validation API

> Number Portability Lookup finds the network operator of any cellular phone number and identifies disconnected, invalid, or non-mobile numbers.

Number Portability Lookup's phone validation API on its Trial account plan. It costs $0.00 per 1,000 phones. It returns 7 of the 9 key fields we check: Number, Formats, Validity, Type, Carrier, Porting and roaming, Place.
We haven't run Number Portability Lookup through [our phone validation API benchmark](https://datacircle.dev/best-phone-validation-api.txt) yet.
This plan is free. We rank 888 plans for phone validation APIs by price. Half the plans cost $3.376 per 1,000 phones or less.
[Botoi's $199 monthly plan](https://datacircle.dev/validate-phone-apis/botoi/199-monthly/llms.txt) is the cheapest paid plan per 1,000 phones: as little as $0.0066. Botoi's $199 monthly plan covers up to 1,000,000 phones a day.
[Data247](https://datacircle.dev/validate-phone-apis/data247/12-pack-membership-get-v3-0-verify247-phone/llms.txt), [Foxentry](https://datacircle.dev/validate-phone-apis/foxentry/top-up-pay-as-you-go-post-phone-validate-validate-phone-number-extended/llms.txt) and [HLR Lookups](https://datacircle.dev/validate-phone-apis/hlr-lookups/top-up-1-1m-post-hlr-lookup/llms.txt) are the best phone validation API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/validate-phone-apis/number-portability-lookup/free
- [Phone validation API: 40+ providers compared](https://datacircle.dev/best-phone-validation-api.txt)
- Get it: https://numberportabilitylookup.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Request: `POST https://api.numberportabilitylookup.com/npl`
- API key: with the plan, on https://numberportabilitylookup.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Its API docs: https://numberportabilitylookup.com/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Sold by: Number Portability Lookup (https://numberportabilitylookup.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing)
- Checked: 2026-11-05

## In the answer

- Completeness: 78%
- Number: ✓
- Formats: ✓
- Validity: ✓
- Type: ✓
- Carrier: ✓
- Porting and roaming: ✓
- Place: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: nothing else

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Number Portability Lookup finds the network operator of any cellular phone number and identifies disconnected, invalid, or non-mobile numbers.

## Data

- Freshness: live
- Countries: Worldwide
- What it checks: carrier, line in service
- Keep data: no limit
- Use data: The User must comply with all applicable laws, regulations and network operator requirements. [...] The User must have express or implied permission of the owner of the cellular telephone before performing a network query. Number queries should not be performed in such a way as to invade the privacy or any person or in contravention of any privacy laws or regulations.

## Plan

- Pay: $0
- You get: 5 credits
- Enough for: 5 results

## Rate limit

- Concurrent: 5
- Batch: 100

## Speed

- Answer: in the call

## The call

- You send: msisdn, format "json". Optional: msc
- Method: POST
- Path: /npl

## About the plan

- Plan: Trial account
- Who can get it: anyone who registers an account (name, position, business name, business email, website and intended use) and passes its brief verification

## The 28 fields the plan's answer can hold

country code, country ISO code, country, error code, error text, IMSI, landline, LRN, local format, mobile, MCC, MNC, MSC, MSISDN, line type, OCN, carrier, original MCC, original MNC, original carrier, PLMN, ported, reachable, SPID, timezone, transaction cost, user balance, valid number

## Number Portability Lookup's plans (3)

- [Number Portability Lookup, free](https://datacircle.dev/validate-phone-apis/number-portability-lookup/free/llms.txt): $0.00 per 1,000, 78% complete, live
- [Number Portability Lookup, top-up](https://datacircle.dev/validate-phone-apis/number-portability-lookup/top-up/llms.txt): $2.50 per 1,000, 78% complete, live
- [Number Portability Lookup, contact us](https://datacircle.dev/validate-phone-apis/number-portability-lookup/contact-us/llms.txt): 78% complete, live

## Number Portability Lookup's calls (1)

- `POST /npl`: [Number Portability Lookup, free](https://datacircle.dev/validate-phone-apis/number-portability-lookup/free/llms.txt)

## Number Portability Lookup's APIs (1)

- [Number Portability Lookup: phone validation API pricing, 3 plans](https://datacircle.dev/validate-phone-apis/number-portability-lookup/free/llms.txt)

## Number Portability Lookup: phone validation API alternatives

- [2Chat, $49 monthly, Basic Plan, GET /open/whatsapp/check-number/{your-number}/{number-to-check}, Check Number](https://datacircle.dev/validate-phone-apis/2chat/49-monthly-basic-plan-get-open-whatsapp-check-number-your-number-number-to-check-check-number/llms.txt): $2.45 per 1,000, 33% complete, live
- [HLR Lookup, £370 pack, 100,000 lookups, POST /apiv2/mnp, MNP-only lookup](https://datacircle.dev/validate-phone-apis/hlr-lookup/370-pack-100000-lookups-post-apiv2-mnp/llms.txt): $2.467 per 1,000, 89% complete, live
- [Veriphone, $249 monthly, Enterprise, GET /v3/verify, /v3/verify, full](https://datacircle.dev/validate-phone-apis/veriphone/249-monthly-enterprise-get-v3-verify-v3-verify-full/llms.txt): $2.49 per 1,000, 78% complete, live
- [CallerAPI, $2,000 monthly, Enterprise transparency $2,000, GET /api/network-lookup/{phone}](https://datacircle.dev/validate-phone-apis/callerapi/2000-monthly-enterprise-transparency-2000-get-api-network-lookup-phone/llms.txt): $2.50 per 1,000, 44% complete, live

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-05.

- https://numberportabilitylookup.com/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://numberportabilitylookup.com/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://numberportabilitylookup.com/coverage?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://numberportabilitylookup.com/hlr_lookup?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://numberportabilitylookup.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://numberportabilitylookup.com/register?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://numberportabilitylookup.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing