Reassigned Numbers Database batch queries
Check your calling list against the Reassigned Numbers Database before dialing. We build the job that sends the right date with each number, through the database's official routes, and writes results back.
| Number | RND answer | Action |
|---|---|---|
| 312-555-0101 | No | Dial OK |
| 312-555-0102 | Yes | Removed |
| 312-555-0103 | No Data | Your policy |
Yes means permanently disconnected since the date sent.
How it runs.
A number can change hands after someone agrees to be called. The check only helps if the date is right and the answer reaches the people dialing.
Numbers due
From your dialer, with the correct last contact date.
Your dataQuery the RND
By SFTP or API, under your account or written authorization.
AutomatedWrite it back
Each answer saved to the record, with the query date.
AutomatedCompliance decides
Your team sets what happens on No Data.
A person
Reassigned Numbers Database / SFTP / REST API / Dialer / CRM
The rules and limits.
- Who may query
- Callers and their agents. An agent must be authorized in writing, with a Letter of Authorization for each client company.
- Routes
- Web screen up to 50 numbers. File upload and SFTP up to 1,000,000 per file. API up to 1,000 at a time.
- Banned
- Scraping, robots, shared logins, and resale. Results are for TCPA compliance only.
- Send and get
- Number, last contact date, and your Registered Company ID. Back comes Yes, No, or No Data.
- Safe harbor
- 47 CFR 64.1200(m) speaks to a response of no. The caller carries the burden of proof. A No Data result does not get you the safe harbor.
What a person does.
- Your compliance team sets check frequency and what happens on No Data.
- A person is responsible for the accuracy of the consent and contact dates you hold.
- Your counsel decides how the safe harbor applies.
Where we stand: we have not shipped this. You need your own RND subscription, and our written authorization as your agent before any build.
Common questions.
Do we need our own RND subscription?+
Yes, or an agent with one under your written authorization. All subscriptions are prepaid through the RND.
Does a No Data result protect us?+
Not by the rule's text. The safe harbor speaks to a response of no. Your counsel should set a policy for No Data numbers.
Does this make our calls TCPA compliant?+
No. It handles one check. Consent, opt-outs, and calling rules remain your program's job.
Sources
- Reassigned Numbers Database: Terms of Use
- Reassigned Numbers Database: Querying data
- 47 CFR 64.1200 (Cornell LII)
General information, not legal, tax, or compliance advice. Rules change; confirm against the current source and your own advisers.

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