# CampaignHQ, contact us: Phone validation API

> Call validation from your services behind authentication. CampaignHQ exposes APIs suited for signup flows, imports, and messaging pipelines without exposing credentials in the browser.

CampaignHQ's Talk to sales plan lets you call the phone validation API. We check each provider's docs for 9 fields. CampaignHQ's docs list 4: Validity, Type, Carrier, Place.
We haven't run CampaignHQ through [our phone validation API benchmark](https://datacircle.dev/best-phone-validation-api.txt) yet.
CampaignHQ gives this plan's price on request. We rank 1,266 plans for phone validation APIs by price. Half the plans cost $3.55 or less per 1,000 phones.
[GuGuData's CNY 124 (about $19) monthly plan](https://datacircle.dev/validate-phone-apis/gugudata/cny-124-monthly/llms.txt) is the cheapest paid plan per 1,000 phones. GuGuData's CNY 124 (about $19) monthly plan charges nothing per call. You get as many phones as GuGuData's rate limit allows. [Neutrino API's On-Demand plan](https://datacircle.dev/validate-phone-apis/neutrino-api/pay-as-you-go-on-demand/llms.txt) costs the least for 10,000 phones a month: $0.80.
[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), [Data247](https://datacircle.dev/validate-phone-apis/data247/12-pack-membership-get-v3-0-verify247-phone/llms.txt) and [Abstract API](https://datacircle.dev/validate-phone-apis/abstract-api/19-monthly-starter-5000-requests-month/llms.txt) are the best phone validation API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/validate-phone-apis/campaignhq/contact-us
- [Phone validation API: the best of 50+ providers compared](https://datacircle.dev/best-phone-validation-api.txt)
- Get it: https://www.campaignhq.co/products/phone-validation?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Request: Docs on request from sales
- API key: with the plan, on https://www.campaignhq.co/products/phone-validation?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Its API docs: https://www.campaignhq.co/products/phone-validation?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- Sold by: CampaignHQ (https://www.campaignhq.co?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing)
- Checked: 2026-11-08

## In the answer

- Completeness: 44%
- Validity: ✓
- Type: ✓
- Carrier: ✓
- Place: ✓

## Price

- Billing: contact

## Aggregators

- Aggregators: none

## In their words

- Their pitch: Call validation from your services behind authentication. CampaignHQ exposes APIs suited for signup flows, imports, and messaging pipelines without exposing credentials in the browser.

## Data

- What it checks: numbering plan
- Keep data: no API terms
- Use data: no API terms

## Speed

- Answer: in the call

## The call

- You send: Docs on request from sales

## About the plan

- Plan: Talk to sales
- Who can get it: anyone 18 or older who can enter into contracts and registers an account

## The 5 fields the plan's answer can hold

valid number, phone type, carrier, country, cleansed phone number in E.164

## CampaignHQ's plans (1)

- [CampaignHQ, contact us](https://datacircle.dev/validate-phone-apis/campaignhq/contact-us/llms.txt): 44% complete

## CampaignHQ's calls (1)

- Docs on request from sales: [CampaignHQ, contact us](https://datacircle.dev/validate-phone-apis/campaignhq/contact-us/llms.txt)

## CampaignHQ's APIs (1)

- [CampaignHQ: phone validation API pricing, 1 plan](https://datacircle.dev/validate-phone-apis/campaignhq/contact-us/llms.txt)

## CampaignHQ: phone validation API alternatives

- [Trestle, contact us, Enterprise, GET /2.0/real_contact, Real Contact API, full](https://datacircle.dev/validate-phone-apis/trestle/contact-us-enterprise-get-2-0-real-contact-real-contact-api-full/llms.txt): 44% complete, stored
- [HLR Lookups, contact us, Postpaid account, POST /mnp-lookups](https://datacircle.dev/validate-phone-apis/hlr-lookups/contact-us-postpaid-account-post-mnp-lookups/llms.txt): 44% complete, live
- [CallerAPI, contact us, Enterprise transparency $40,000+, GET /api/network-lookup/{phone}](https://datacircle.dev/validate-phone-apis/callerapi/contact-us-enterprise-transparency-40000-get-api-network-lookup-phone/llms.txt): 44% complete, live
- [Addressfinder, contact us](https://datacircle.dev/validate-phone-apis/addressfinder/contact-us/llms.txt): 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 2026-11-08.

- https://campaignhq.docs.apiary.io/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://www.campaignhq.co/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://www.campaignhq.co/products/phone-validation?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing
- https://www.campaignhq.co/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=phone-validation-api-pricing