Reassigned Numbers Database (RND) API
Stay Compliant and Avoid Costly TCPA Violations
The Reassigned Number Database (RND) API helps businesses verify if a phone number has been disconnected or reassigned before making a call.
This ensures that you are not unintentionally contacting someone who did not provide prior consent, protecting your business from potential TCPA violations and legal risks.
Are you sure your phone numbers still belong to the same person?
Avoid costly TCPA fines for calling reassigned numbers.
Protect your business and stay compliant.
What is the Reassigned Number Database API?
The Reassigned Number Database API is a powerful tool that allows businesses to check if a phone number has been disconnected or reassigned after the last date of consent. This API accesses the FCC-mandated national database, where telecom providers have tracked number disconnections since January 27, 2021.
With a simple query, you can instantly determine if a phone number has been reassigned, ensuring that your business remains compliant with telemarketing laws, including TCPA and Telemarketing Sales Rules (TSR).
Who Needs the RND API?
Businesses that rely on outbound calls benefit from this API, including
Debt Collection Agencies
Businesses that rely on outbound calls benefit from this API, including
Telemarketers & Call Centers
Verify that the number still
belongs to the original
debtor.
Financial Institutions
Ensure compliance when
reaching out to customers
about loans or payments.
Healthcare Providers
Confirm patient contact
information before making
appointment reminder calls.
How the RND API Works
Submit a Phone Number and Last Date of Consent
Query a phone number to check its reassignment status.
Instant Verification
The API checks against the national reassigned number database.
Make Informed Decisions
Receive one of the following responses:
- Yes (number was reassigned after the date)
- No (number was not reassigned)
- No_data (information not available)

Legal Risks Without Compliance
Why Does Compliance Matter?
TCPA violations can result in fines up to $1,500 per call.
If you’re calling a reassigned number, you risk unintentionally violating the law.
Safe Harbor protection ensures that businesses are covered if they follow proper steps to verify phone numbers.
Searchbug’s RND API vs. FCC’s RND
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Simple Letter of Authorization (LOA)
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Fast and easy access
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No signup fees
(Only pay for what you use)
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No monthly contracts
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Flexibility in pricing
(pay per use vs. subscription)
Feature | Searchbug | Reassigned.us | DNC.com |
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DNC + TCPA Litigator Check | ![]() |
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RND API Access | ![]() |
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Free API Test | ![]() |
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Pay-Per-Use Pricing | ![]() |
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Why Choose Searchbug RND API?
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Free API Testing
Why pay upfront without knowing if an API works for you? Searchbug lets businesses test the API for free before making any commitment. You can check performance, response times, and integration before deciding. The FCC's RND does not offer free testing, making Searchbug's option the smarter choice for businesses evaluating their compliance tools.
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No Lengthy Application Process
The FCC's RND access requires a long application process, multiple forms, and waiting for approval, which can take several days. With Searchbug, all you need to do is complete a simple Letter of Authorization (LOA)—no confusing paperwork or lengthy delays. Businesses can start checking phone numbers and maintain compliance without unnecessary hurdles.
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No Signup Fees or Mandatory Subscriptions
The FCC's RND requires businesses to sign up for a subscription, whether they use the service frequently or not, and with a "use it or lose it" policy. This creates unnecessary costs for businesses that only need occasional queries.
Searchbug keeps things straightforward—no signup fees or mandatory monthly, quarterly, or annual contracts. You pay only when you need it, making it a budget-friendly alternative.
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Pay-Per-Use Model
Searchbug's pricing model is designed for flexibility. You only pay for the queries you send, avoiding wasted spending on subscriptions you might not fully use.
The FCC charges recurring fees regardless of usage, making it more expensive for businesses with low query volume. Searchbug gives you full control over how much you spend.
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Cumulative Volume-Based Pricing
The more queries you run in a given month, the lower your cost per query. Businesses automatically save money as their query volume increases.
The FCC only offers volume-based discounts with upfront commitments, subscriptions, and query maximums that expire. Searchbug's pricing structure allows businesses to scale their compliance checks without breaking the bank.
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Simple, Fast, Reliable, and Cost-Effective
FCC approval takes up to 7 business days before you can use their RND. Searchbug gets you approved in just 1-2 business days—so you can start querying numbers right away.
This saves time, reduces compliance risks, and helps businesses operate more efficiently. Searchbug's API is also easier to integrate with helpful customer and technical support, making it the better choice for companies looking for quick, hassle-free implementation.
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Safe Harbor Protection
TCPA fines can be expensive, but Safe Harbor Protection can shield businesses from liability when they properly check reassigned numbers. Searchbug ensures that companies using the RND API correctly are legally covered, reducing the risk of facing compliance-related lawsuits.
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&REF Parameter for Usage Tracking
Searchbug's API includes an &REF parameter, allowing businesses to track their queries and monitor compliance records easily. This feature provides clear tracking of how queries are being used, which simplifies internal reporting and ensures accurate billing.
The FCC's RND lacks this functionality, making it harder for businesses to track queries.
Frequently Asked Questions (FAQ)
How often is the database updated?
The Reassigned Numbers Database (RND) is updated regularly to maintain accuracy. Updates are completed by 8 a.m. ET on the 17th of each month, based on new data from phone carriers, so querying right after this update ensures the most recent data is available.
What happens if I query a number incorrectly?
If you query a number incorrectly, Searchbug’s RND API will return an error message indicating the issue. It’s important to ensure that the correct phone number format is used to avoid incorrect queries. You can refer to the API documentation for proper query formatting.
How do I maintain records of my queries?
You can maintain records of your queries by logging the responses from the API, including the query date, number checked, and results. This helps with auditing and ensuring compliance. We recommend storing these logs in your system for future reference.
Is using the RND mandatory for businesses?
While using Searchbug’s RND API is not legally required, it is highly recommended for businesses engaged in telemarketing, as it helps prevent costly TCPA violations by ensuring you don’t contact reassigned numbers. It’s an essential tool for maintaining compliance.
What legal protections does RND offer?
Searchbug’s RND API offers Safe Harbor protection under the TCPA. If you check the database before contacting a number and the number hasn’t been reassigned, you are shielded from liability even if the number is later reassigned after your query. This protection helps reduce the risk of legal penalties.
How can I ensure my organization properly integrates the RND into calling protocols?
Proper integration involves automating the query process before each call or text. Ensure your system checks the RND in real-time or in batches before outreach. Follow the API guidelines, keep logs, and train your team to use the tool effectively.
How can I integrate RND into my existing systems?
You can integrate Searchbug’s RND API into your existing systems by using the provided API endpoints and documentation. This includes setting up your system to automatically query the database before sending calls or texts. Our integration process is designed to be seamless and developer-friendly.
What are the technical requirements for using the API?
Searchbug’s RND API is compatible with most modern systems that support HTTP requests and JSON responses. You’ll need an internet connection and the ability to integrate RESTful API calls into your application. Basic programming knowledge (e.g., in Python, JavaScript, or another common language) is required for integration.
Can I query multiple numbers at once?
Yes, Searchbug’s RND is a REST API that supports POST queries, allowing you to check multiple numbers in a single API request. This helps streamline your process and saves time, especially for large-scale operations that need to verify numerous numbers at once.
What is the cost of using the RND?
The cost of using Searchbug’s RND API is based on a pay-per-use pricing model. You only pay for the queries you make, and the cost per query decreases with higher usage. We also offer volume-based pricing discounts to ensure cost efficiency for businesses with frequent query needs. Please contact us for detailed pricing information.