RND Basic API

The RND (Reassigned Number Database) Basic API provides a streamlined interface for checking if phone numbers have been reassigned using the FCC Reassigned Number Database.

Endpoint

https://dataapi.dncscrub.com/v1.5/Data/RNDBasic

Authentication

Include your API key in the loginId HTTP header:

--header 'loginId: YOUR_API_KEY'

Parameters

Parameter	Required	Description
`phoneNumber`	Yes	10-digit phone number (no leading 1 or +)
`date`	Yes	Consent date to check against
`useSandbox`	No	Set to `true` to use sandbox mode for testing (returns random results)
`projId`	No	Project identifier for tracking purposes

Date Formats

The date parameter accepts multiple formats:

Format	Example
`MM/DD/YYYY`	`09/29/2021`
`YYYY-MM-DD`	`2021-09-29`
`MM/DD/YY`	`09/29/21`
`YYYYMMDD`	`20210929`

Single Number Request (GET)

curl --location --request GET \
  'https://dataapi.dncscrub.com/v1.5/Data/RNDBasic?phoneNumber=7075276405&date=20211109' \
  --header 'loginId: YOUR_API_KEY'

const response = await fetch(
  "https://dataapi.dncscrub.com/v1.5/Data/RNDBasic?phoneNumber=7075276405&date=20211109",
  {
    headers: { loginId: "YOUR_API_KEY" },
  }
);
const result = await response.json();

using (var client = new HttpClient())
{
    client.DefaultRequestHeaders.Add("loginId", "YOUR_API_KEY");
    var response = await client.GetStringAsync(
        "https://dataapi.dncscrub.com/v1.5/Data/RNDBasic?phoneNumber=7075276405&date=20211109"
    );
}

Response

{
  "PhoneNumber": "7075276405",
  "IsReassigned": false,
  "HasSafeHarbor": true,
  "IsSandBox": false
}

Multiple Number Request (POST)

For checking multiple numbers, use HTTP POST with a JSON body:

curl --location --request POST \
  'https://dataapi.dncscrub.com/v1.5/Data/RNDBasic' \
  --header 'loginId: YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data-raw '{
    "Data": [
      { "phoneNumber": "7075276405", "date": "20211109" },
      { "phoneNumber": "5039367187", "date": "20211109" }
    ],
    "UseSandbox": false,
    "ProjId": "Demo"
  }'

Response

[
  {
    "PhoneNumber": "7075276405",
    "IsReassigned": false,
    "HasSafeHarbor": true,
    "IsSandBox": false
  },
  {
    "PhoneNumber": "5039367187",
    "IsReassigned": false,
    "HasSafeHarbor": true,
    "IsSandBox": false
  }
]

Response Fields

Field	Type	Description
`PhoneNumber`	String	The phone number checked
`IsReassigned`	Boolean/null	`true` = reassigned, `false` = not reassigned, `null` = unknown
`HasSafeHarbor`	Boolean	`true` if FCC safe harbor exemption may be available
`IsSandBox`	Boolean	`true` if response was generated in sandbox mode, `false` for production data

Rate Limits

Limit	Value
Numbers per request	1,000

Use Cases

Basic reassignment detection
Cost-effective compliance checking
Safe harbor verification

Getting Started

Contact our support team to:

Get your API credentials
Access Postman collection samples

Reassigned Authority Plus API

Enhanced reassigned number API with carrier data and extended historical coverage

Test Numbers

Test phone numbers for development

⌘I

Getting Started

Full Scrub

Litigator-Only Scrub

Reassigned Scrub

Call Deliverability (TrustCall)

Data Enhancement

GeoScrub

Other APIs

Code Examples

RND Basic API

RND Basic API

Endpoint

Authentication

Parameters

Date Formats

Single Number Request (GET)

Response

Multiple Number Request (POST)

Response

Response Fields

Rate Limits

Use Cases

Getting Started

Reassigned Authority Plus API

Test Numbers

​RND Basic API

​Endpoint

​Authentication

​Parameters

​Date Formats

​Single Number Request (GET)

​Response

​Multiple Number Request (POST)

​Response

​Response Fields

​Rate Limits

​Use Cases

​Getting Started

​Related Documentation

Reassigned Authority Plus API

Test Numbers

RND Basic API

Endpoint

Authentication

Parameters

Date Formats

Single Number Request (GET)

Response

Multiple Number Request (POST)

Response

Response Fields

Rate Limits

Use Cases

Getting Started

Related Documentation