# 121prodata, £0.30 pack, 1-4 tel. numbers, POST /api/: Do-not-call check API

> 121prodata's TPS and CTPS API allows you to create an integration that automates checks for single numbers or multiple (batch) numbers against both the TPS and CTPS registers.

121prodata's 1-4 tel. numbers plan for the do-not-call check API costs $400.317 per 1,000 phones. We check each provider's docs for 8 fields. 121prodata's docs list 1: Any register.
£300.20 per 1,000 phones is $400.317 at the European Central Bank's rate of $1.3335 for £1.
We haven't run a do-not-call check API benchmark yet.
We rank 90 plans for do-not-call check APIs by price. Half the plans cost $7.468 or less per 1,000 phones. This plan has the highest price per 1,000 phones of the 90 plans.
[DNC Finder's $48 monthly plan](https://datacircle.dev/do-not-call-check-apis/dnc-finder/48-monthly/llms.txt) costs the least per 1,000 phones, for the United States only, with no charge per call. You get as many phones as DNC Finder's rate limit allows. [TPSCheck's £289 yearly plan](https://datacircle.dev/do-not-call-check-apis/tpscheck/289-yearly/llms.txt) costs the least for 10,000 phones a month: about $32.12.
[DNCSweeper's $149 monthly plan](https://datacircle.dev/do-not-call-check-apis/dncsweeper/149-monthly/llms.txt) covers any number of phones in the United States only, and costs more up front than DNC Finder's $48 monthly plan.

- This page: https://datacircle.dev/do-not-call-check-apis/121prodata/0-30-pack-1-4-tel-numbers-post-api
- Get it: https://www.121prodata.co.uk/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=do-not-call-check-api-pricing
- Request: `POST https://www.121prodata.co.uk/api/`
- API key: with the plan, on https://www.121prodata.co.uk/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=do-not-call-check-api-pricing
- Its API docs: https://www.121prodata.co.uk/tps-services/tps-ctps-api-documentation-multiple?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=do-not-call-check-api-pricing
- Sold by: 121prodata (https://www.121prodata.co.uk?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=do-not-call-check-api-pricing)
- Checked: 2026-11-13

## In the answer

- Completeness: 13%
- Any register: ✓

## Price

- $ per 1,000 phones: $400.317
- Per: result
- Billing: pay first

## Charges

- Also pays for: from the same budget: Single number check

## Overage

- Units cap: hard

## In their words

- Their pitch: 121prodata's TPS and CTPS API allows you to create an integration that automates checks for single numbers or multiple (batch) numbers against both the TPS and CTPS registers.

## Data

- Freshness: 1 day
- Countries: United Kingdom
- Keep data: no limit
- Use data: 4.1: a non-exclusive, non-transferable, revocable licence, for the term of the Agreement, to access and use the Services (including the API) for the Client's own internal business purposes, in accordance with the Documentation. 4.4: The Client must not, and must ensure Authorised Users do not, sub-license, resell, rent, lease or otherwise make the Services available to any third party, or use the Services to build or support a product or service competitive with 121prodata, without 121prodata's prior written consent. 5.1: The Client must not, and must ensure Authorised Users do not: reverse engineer, decompile or attempt to extract the source code of any part of the Services, except to the extent permitted by law, probe, scan or test the vulnerability of the Services, or circumvent, or submit requests in excess of, any rate limit, usage limit, security control or access restriction, use automated means to access the Services other than through the documented API in accordance with the Documentation, share API Keys or Account credentials outside the Client's own organisation, submit any User Data that 121prodata has no lawful basis to receive or process, or that infringes the rights of any third party, use the Services for any unlawful purpose, or in a way that would cause the Client or 121prodata to breach the Data Protection Legislation, including using the outcome of a check as the sole basis for a claim of compliance with PECR where other requirements (for example, consent-based rules or the soft opt-in) also apply, or use the Services in any manner that could damage, disable, overburden or impair 121prodata's systems.

## Plan

- Pay: £0.30
- You get: 1 credit
- Enough for: 1 result
- Expires: 10 years

## Rate limit

- Batch: 250,000

## Speed

- Answer: in the call

## The call

- You send: data. Optional: input_format, test_mode, reference
- Method: POST
- Path: /api/

## About the plan

- Plan: 1-4 tel. numbers
- Who can get it: business use only: "The Services are provided for business use only", any account holder, prices ex VAT with VAT @ 20% added, nil outside the UK

## The 6 fields the plan's answer can hold

phone number, listed on TPS or CTPS, transaction reference, number of matches, credits used, valid until

## 121prodata's plans (25)

- [121prodata, £0.30 pack, 1-4 tel. numbers, POST /api/](https://datacircle.dev/do-not-call-check-apis/121prodata/0-30-pack-1-4-tel-numbers-post-api/llms.txt): $400.317 per 1,000, 13% complete, 1 day
- [121prodata, £0.50 pack, 5-9 tel. numbers, POST /api/](https://datacircle.dev/do-not-call-check-apis/121prodata/0-50-pack-5-9-tel-numbers-post-api/llms.txt): $133.617 per 1,000, 13% complete, 1 day
- [121prodata, £0.80 pack, 10-14 tel. numbers, POST /api/](https://datacircle.dev/do-not-call-check-apis/121prodata/0-80-pack-10-14-tel-numbers-post-api/llms.txt): $106.947 per 1,000, 13% complete, 1 day
- [121prodata, £0.90 pack, 15-24 tel. numbers, POST /api/](https://datacircle.dev/do-not-call-check-apis/121prodata/0-90-pack-15-24-tel-numbers-post-api/llms.txt): $80.277 per 1,000, 13% complete, 1 day
- [121prodata, £1.01 pack, 25-49 tel. numbers, POST /api/](https://datacircle.dev/do-not-call-check-apis/121prodata/1-01-pack-25-49-tel-numbers-post-api/llms.txt): $53.607 per 1,000, 13% complete, 1 day
- [121prodata, £1.01 pack, 50-99 tel. numbers, POST /api/](https://datacircle.dev/do-not-call-check-apis/121prodata/1-01-pack-50-99-tel-numbers-post-api/llms.txt): $26.937 per 1,000, 13% complete, 1 day
- [121prodata, £1.82 pack, 100-249 tel. numbers, POST /api/](https://datacircle.dev/do-not-call-check-apis/121prodata/1-82-pack-100-249-tel-numbers-post-api/llms.txt): $24.27 per 1,000, 13% complete, 1 day
- [121prodata, £4.30 pack, 250-499 tel. numbers, POST /api/](https://datacircle.dev/do-not-call-check-apis/121prodata/4-30-pack-250-499-tel-numbers-post-api/llms.txt): $22.936 per 1,000, 13% complete, 1 day
- [121prodata, £6.10 pack, 500-999 tel. numbers, POST /api/](https://datacircle.dev/do-not-call-check-apis/121prodata/6-10-pack-500-999-tel-numbers-post-api/llms.txt): $16.269 per 1,000, 13% complete, 1 day
- [121prodata, £10.20 pack, 1,000-2,499 tel. numbers, POST /api/](https://datacircle.dev/do-not-call-check-apis/121prodata/10-20-pack-1000-2499-tel-numbers-post-api/llms.txt): $13.602 per 1,000, 13% complete, 1 day
- [121prodata, £20.50 pack, 2,500-4,999 tel. numbers, POST /api/](https://datacircle.dev/do-not-call-check-apis/121prodata/20-50-pack-2500-4999-tel-numbers-post-api/llms.txt): $10.935 per 1,000, 13% complete, 1 day
- [121prodata, £36 pack, 5,000-9,999 tel. numbers, POST /api/](https://datacircle.dev/do-not-call-check-apis/121prodata/36-pack-5000-9999-tel-numbers-post-api/llms.txt): $9.601 per 1,000, 13% complete, 1 day
- [121prodata, £52 pack, 10,000-24,999 tel. numbers, POST /api/](https://datacircle.dev/do-not-call-check-apis/121prodata/52-pack-10000-24999-tel-numbers-post-api/llms.txt): $6.934 per 1,000, 13% complete, 1 day
- [121prodata, £105 pack, 25,000-49,999 tel. numbers, POST /api/](https://datacircle.dev/do-not-call-check-apis/121prodata/105-pack-25000-49999-tel-numbers-post-api/llms.txt): $5.601 per 1,000, 13% complete, 1 day
- [121prodata, £160 pack, 50,000-99,999 tel. numbers, POST /api/](https://datacircle.dev/do-not-call-check-apis/121prodata/160-pack-50000-99999-tel-numbers-post-api/llms.txt): $4.267 per 1,000, 13% complete, 1 day
- [121prodata, £245 pack, 100,000-199,999 tel. numbers, POST /api/](https://datacircle.dev/do-not-call-check-apis/121prodata/245-pack-100000-199999-tel-numbers-post-api/llms.txt): $3.267 per 1,000, 13% complete, 1 day
- [121prodata, £400 pack, 200,000-249,999 tel. numbers, POST /api/](https://datacircle.dev/do-not-call-check-apis/121prodata/400-pack-200000-249999-tel-numbers-post-api/llms.txt): $2.667 per 1,000, 13% complete, 1 day
- [121prodata, £450 pack, 250,000-499,999 tel. numbers, POST /api/](https://datacircle.dev/do-not-call-check-apis/121prodata/450-pack-250000-499999-tel-numbers-post-api/llms.txt): $2.40 per 1,000, 13% complete, 1 day
- [121prodata, £700 pack, 500,000-999,999 tel. numbers, POST /api/](https://datacircle.dev/do-not-call-check-apis/121prodata/700-pack-500000-999999-tel-numbers-post-api/llms.txt): $1.867 per 1,000, 13% complete, 1 day
- [121prodata, £800 pack, 1,000,000-1,999,999 tel. numbers, POST /api/](https://datacircle.dev/do-not-call-check-apis/121prodata/800-pack-1000000-1999999-tel-numbers-post-api/llms.txt): $1.067 per 1,000, 13% complete, 1 day
- [121prodata, £1,400 pack, 2,000,000-2,999,999 tel. numbers, POST /api/](https://datacircle.dev/do-not-call-check-apis/121prodata/1400-pack-2000000-2999999-tel-numbers-post-api/llms.txt): $0.933 per 1,000, 13% complete, 1 day
- [121prodata, £1,800 pack, 3,000,000-3,999,999 tel. numbers, POST /api/](https://datacircle.dev/do-not-call-check-apis/121prodata/1800-pack-3000000-3999999-tel-numbers-post-api/llms.txt): $0.80 per 1,000, 13% complete, 1 day
- [121prodata, £2,200 pack, 4,000,000-4,999,999 tel. numbers, POST /api/](https://datacircle.dev/do-not-call-check-apis/121prodata/2200-pack-4000000-4999999-tel-numbers-post-api/llms.txt): $0.733 per 1,000, 13% complete, 1 day
- [121prodata, contact us, Large User Subscription, POST /api/](https://datacircle.dev/do-not-call-check-apis/121prodata/contact-us-large-user-subscription-post-api/llms.txt): 13% complete, 1 day
- [121prodata, contact us, Over 4,999,999 credits: custom quote, POST /api/](https://datacircle.dev/do-not-call-check-apis/121prodata/contact-us-over-4999999-credits-custom-quote-post-api/llms.txt): 13% complete, 1 day

## 121prodata's calls (2)

- `POST /api/`: [121prodata, £0.30 pack, 1-4 tel. numbers, POST /api/](https://datacircle.dev/do-not-call-check-apis/121prodata/0-30-pack-1-4-tel-numbers-post-api/llms.txt)
- `GET /api/`: [121prodata, £0.30 pack, 1-4 tel. numbers, GET /api/](https://datacircle.dev/do-not-call-check-apis/121prodata/0-30-pack-1-4-tel-numbers-get-api/llms.txt)

## 121prodata's APIs (1)

- [121prodata Do-not-call check API pricing, 25 plans, POST /api/](https://datacircle.dev/do-not-call-check-apis/121prodata/0-30-pack-1-4-tel-numbers-post-api/llms.txt)

## 121prodata: do-not-call check API alternatives

[121prodata alternatives: other do-not-call check API providers by price](https://datacircle.dev/121prodata-alternatives.txt)

We list other providers' plans closest to this plan in price per 1,000 phones. Each plan in the list gives live data or data at most a day old.

- [DNC Finder, $48 monthly](https://datacircle.dev/do-not-call-check-apis/dnc-finder/48-monthly/llms.txt): $0.018 per 1,000, 38% complete, 1 day
- [tpsmydata, £12 pack, 2,000 credits, GET /](https://datacircle.dev/do-not-call-check-apis/tpsmydata/12-pack-2000-credits-get/llms.txt): $8.001 per 1,000, 63% complete, 1 day
- [TPS API, £40 pack](https://datacircle.dev/do-not-call-check-apis/tps-api/40-pack/llms.txt): $8.206 per 1,000, 38% complete, 1 day
- [TPSClear, £95 monthly](https://datacircle.dev/do-not-call-check-apis/tpsclear/95-monthly/llms.txt): $50.673 per 1,000, 38% complete, 1 day

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-13.

- https://www.121prodata.co.uk/js/pricing.js?v=20260930&utm_source=datacircle.dev&utm_medium=referral&utm_campaign=do-not-call-check-api-pricing
- https://www.121prodata.co.uk/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=do-not-call-check-api-pricing
- https://www.121prodata.co.uk/resources/frequently-asked-questions?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=do-not-call-check-api-pricing
- https://www.121prodata.co.uk/terms-and-conditions?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=do-not-call-check-api-pricing
- https://www.121prodata.co.uk/tps-services/tps-ctps-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=do-not-call-check-api-pricing
- https://www.121prodata.co.uk/tps-services/tps-ctps-api-documentation-multiple?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=do-not-call-check-api-pricing
- https://www.121prodata.co.uk/tps-services/tps-ctps-api-documentation-single?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=do-not-call-check-api-pricing