Telnyx

Branded Calling is in beta. Learn more in Making calls with Branded Calling.

This walk-through takes you from a fresh account to a verified Display Identity Record (DIR) with phone numbers attached. You’ll need a verified or enterprise-level Telnyx account and an API key.

Before you begin

You’ll need:

A Telnyx account with verified or enterprise access and an API key.
One or more US Telnyx phone numbers in your inventory. (Branded Calling is currently US-to-US; non-US numbers won’t produce a branded result yet.)
Your business legal details (legal name, EIN, jurisdiction of incorporation, addresses, contacts).
A logo image, 256×256 BMP only, ≤1 MB, hosted at a publicly-reachable HTTPS URL (optional, you can submit without one). Most design tools export PNG by default; convert to BMP with any standard image editor (Preview, Photoshop, ImageMagick, GIMP) before hosting.
Supporting documents (e.g. business registration, letter of authorization). Upload each one through the Telnyx Documents API first; the API gives you back a document_id that you reference here.

Step 1: Accept the Branded Calling Terms of Service

Read the full terms at telnyx.com/terms/branded-calling.

curl -X POST https://api.telnyx.com/v2/terms_of_service/branded_calling/agree \
  -H "Authorization: Bearer YOUR_API_KEY"

Idempotent, calling again after you’ve already agreed is a no-op. You can check your current agreement status at any time:

curl "https://api.telnyx.com/v2/terms_of_service/status?product_type=branded_calling" \
  -H "Authorization: Bearer YOUR_API_KEY"

Step 2: Create an Enterprise

curl -X POST https://api.telnyx.com/v2/enterprises \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "legal_name": "Acme Healthcare Inc.",
    "doing_business_as": "Acme Healthcare",
    "organization_type": "commercial",
    "organization_legal_type": "corporation",
    "country_code": "US",
    "jurisdiction_of_incorporation": "Delaware",
    "website": "https://acmehealthcare.example.com",
    "fein": "12-3456789",
    "industry": "healthcare",
    "number_of_employees": "51-200",
    "organization_contact": {
      "first_name": "Jane",
      "last_name": "Smith",
      "email": "jane@acmehealthcare.example.com",
      "job_title": "VP Operations",
      "phone_number": "+12125551234"
    },
    "billing_contact": {
      "first_name": "Jane",
      "last_name": "Smith",
      "email": "billing@acmehealthcare.example.com",
      "phone_number": "+12125551234"
    },
    "organization_physical_address": {
      "country": "US",
      "administrative_area": "NY",
      "city": "New York",
      "postal_code": "10001",
      "street_address": "123 Main St"
    },
    "billing_address": {
      "country": "US",
      "administrative_area": "NY",
      "city": "New York",
      "postal_code": "10001",
      "street_address": "123 Main St"
    }
  }'

Save the id from the response, you’ll need it for the activation step. For the full field reference (every required field, enum values, contact + address shape), see Enterprises.

Step 3: Activate Branded Calling on the enterprise

Branded Calling is a paid product that must be explicitly activated per enterprise. Without this step, DIR creation in Step 5 returns 400 with code=10015 and a detail pointing back to this endpoint.

curl -X POST https://api.telnyx.com/v2/enterprises/{enterprise_id}/branded_calling \
  -H "Authorization: Bearer YOUR_API_KEY"

The HTTP response returns with the enterprise body.

Activation completes asynchronously. The enterprise body comes back immediately, but the registration finishes a few seconds later. If you create a DIR (Step 5) right away you may get 400 with detail: "Branded calling registration has not completed" for roughly 10 seconds. Wait and retry, or poll the enterprise until activation settles. Both endpoints are idempotent.

A 403 here means the Branded Calling Terms of Service hasn’t been accepted yet (back to Step 1).

Activating Branded Calling on an enterprise is billable. See Telnyx pricing.

Step 4: (Optional) Validate your call reasons up front

When a DIR’s call reasons are all pre-approved, the call-reason vetting check passes automatically, which can speed up review (the DIR is still vetted and is not auto-approved). Run them through the validator before creating the DIR, both reasons below are on the pre-approved catalogue, so this example returns all_pre_approved: true:

curl -X POST https://api.telnyx.com/v2/call_reasons/validate \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '["Appointment Reminder", "Follow-Up Calls"]'

The body is a bare JSON array of strings: do not wrap it in { "call_reasons": [...] }.

If you instead send a mix that includes any custom string (for example "Patient Follow-up", which is not on the pre-approved list), the response is requires_manual_vetting: true with the offending entries in non_approved_reasons. Custom reasons are still allowed; the call-reason check is then reviewed manually, which can take longer. Pull the live pre-approved catalogue with GET /v2/call_reasons (see the Call Reasons guide) and copy the reason strings verbatim into your DIR to help speed up the call-reason check.

Step 5: Create a DIR

A Display Identity Record (DIR) defines what recipients see on their phone: display name, logo, and call reason.

curl -X POST https://api.telnyx.com/v2/enterprises/{enterprise_id}/dir \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "display_name": "Acme Healthcare",
    "authorizer_name": "Jane Smith",
    "authorizer_email": "jane@acmehealthcare.example.com",
    "certify_brand_is_accurate": true,
    "certify_no_shaft_content": true,
    "certify_ip_ownership": true,
    "call_reasons": ["Appointment Reminder", "Follow-Up Calls"],
    "logo_url": "https://acmehealthcare.example.com/logo-256.bmp",
    "documents": [
      {
        "document_id": "2a7e8337-e803-4057-a4ae-26c40eb0bc6c",
        "document_type": "business_registration",
        "description": "Certificate of incorporation."
      }
    ]
  }'

Field rules, these are enforced and a violation returns 400 (with an error code such as 10015, 10025, or 10026 and a source.pointer to the offending field):

Field	Rule
`display_name`	Required, 1-35 characters, no emoji, not whitespace-only. Shown to recipients.
`authorizer_name`	Required, max 255 chars. Person authorizing the DIR registration.
`authorizer_email`	Required, valid email.
`certify_brand_is_accurate`	Required, must be `true`.
`certify_no_shaft_content`	Required, must be `true`. (SHAFT = Sex, Hate, Alcohol, Firearms, Tobacco.)
`certify_ip_ownership`	Required, must be `true`.
`call_reasons`	Required, 1-10 items, each 1-64 characters.
`logo_url`	Optional. HTTPS only, max 128 chars. Telnyx downloads it and validates it as a 256×256 BMP (≤1 MB) at create time; if validation fails the DIR is not written.
`documents`	Optional, up to 20 entries. Each `document_id` must come from a prior upload to the Telnyx Documents API. Duplicates within one DIR are rejected.
`reselling`	Optional boolean. `true` if you resell calling services on behalf of others. Defaults to `false`.

The DIR is created in draft status. Save the id, this is your dir_id.

Step 6: Submit for vetting

curl -X POST https://api.telnyx.com/v2/dir/{dir_id}/submit \
  -H "Authorization: Bearer YOUR_API_KEY"

The DIR moves to submitted, then in_review. Telnyx then reviews and approves the DIR out-of-band (this is not instantaneous; pre-approved call reasons can shorten it - see Step 4). Wait for the DIR to reach verified before attaching phone numbers in Step 7. Outcomes:

verified, approved. Phone numbers can now be attached.
rejected, fixable. Read rejection_reasons on the DIR and the vetting_comment / rejection_reason entries on GET /v2/dir/{dir_id}/comments for context, PATCH the offending fields, then POST /submit again.
unsuccessful, system error. Same handling as rejected.
permanently_rejected, terminal. The only exit is DELETE /v2/dir/{dir_id} (remove any attached phone numbers first, or the delete returns 400).

If all your call reasons are pre-approved (Step 4), the call-reason check passes automatically, which can shorten review - but the DIR still goes through vetting before it reaches verified.

Once a DIR is verified, a non-trivial PATCH that actually changes a field moves it back to draft and tears down the live registration. You must POST /submit and be re-approved before it serves traffic again. Avoid editing a verified DIR unless you intend to re-vet it.

While waiting, poll GET /v2/dir/{dir_id} for the current status. Use a sensible cadence (e.g. once every 30-60 seconds); don’t poll in a tight loop. If /submit fails with a 400 and the DIR has an open infringement claim, resolve the claim first, see Infringement Claims.

Step 7: Attach phone numbers

Once the DIR is verified, you can attach phone numbers. A signed Letter of Authorization (LOA) is required on every add request. First upload your signed LOA to the Telnyx Documents API and capture the returned id:

# Step 7a - upload the signed LOA (multipart); the response includes the document id
curl -X POST https://api.telnyx.com/v2/documents \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -F "file=@loa.pdf"
# Response includes "id": "2a7e8337-e803-4057-a4ae-26c40eb0bc6c"

Then add the numbers, referencing that id as document_id:

# Step 7b - add the numbers, with the LOA in the documents array
curl -X POST https://api.telnyx.com/v2/dir/{dir_id}/phone_numbers \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "phone_numbers": ["+12125551234", "+12125555678"],
    "documents": [
      {
        "document_id": "2a7e8337-e803-4057-a4ae-26c40eb0bc6c",
        "document_type": "letter_of_authorization",
        "description": "LOA covering this set of numbers."
      }
    ]
  }'

A documents array with at least one letter_of_authorization entry is required (1-20 documents). The request is rejected with 400 if it’s missing or has no LOA entry.
Up to 15 numbers per request.
Atomic: if any number is invalid, already attached, or not in your inventory, the entire batch is rejected with 400 and nothing is written. The error response identifies the offending number(s); remove them and re-submit the rest.
Numbers must be E.164 format and present in your Telnyx inventory.
The DIR must be in verified status. Adding numbers to a DIR in any other status returns 400 with detail "...DIR must be verified".

Adding phone numbers is billable. See Telnyx pricing.

Each POST creates one batch. Track batch progress through carrier-network vetting:

curl https://api.telnyx.com/v2/dir/{dir_id}/phone_number_batches \
  -H "Authorization: Bearer YOUR_API_KEY"

See Phone Numbers for the full batch lifecycle.

Step 8: Make branded calls

Once a phone number reaches verified status, it is eligible to display your branded identity on outbound calls.

The recipient’s experience depends on their carrier and device supporting branded calling. Coverage is strongest on major US carriers with compatible devices.

What’s next

Display Identity Records (DIRs), full DIR lifecycle, statuses, editing, deletion.
Phone Numbers, adding/removing numbers and inspecting batches.
Call Reasons, the pre-approved list and the validator.
Infringement Claims, what to do if a claim is filed against your DIR.

​Before you begin

​Step 1: Accept the Branded Calling Terms of Service

​Step 2: Create an Enterprise

​Step 3: Activate Branded Calling on the enterprise

​Step 4: (Optional) Validate your call reasons up front

​Step 5: Create a DIR

​Step 6: Submit for vetting

​Step 7: Attach phone numbers

​Step 8: Make branded calls

​What’s next

Before you begin

Step 1: Accept the Branded Calling Terms of Service

Step 2: Create an Enterprise

Step 3: Activate Branded Calling on the enterprise

Step 4: (Optional) Validate your call reasons up front

Step 5: Create a DIR

Step 6: Submit for vetting

Step 7: Attach phone numbers

Step 8: Make branded calls

What’s next