Can't buy a phone number

Question

I'm in the US, I have a work subscription on a Pay as you Go plan. From everything I can find here and in docs I should be able to buy a phone number (account, subscription, location, everything matches docs to qualify) but everything is disabled when I try (get is disabled, and 'buy phone' page never loads the country input and its disabled).

There is no messaging or reason given, copilot is zero help, I have the resource and things created and ready. It says I can buy up to 5 numbers, but wont let me. Do I have to do something to enable this that isn't documented?

Answer 1

Hello @Matthew Boyer

Thank you for reaching out Microsoft Q&A. Please could you let us know how long your account is associated with Pay as you go subscription?

Phone number acquisition is strictly controlled at the Azure subscription level. Even though Pay‑As‑You‑Go subscriptions are listed as eligible, Microsoft states that phone numbers can only be purchased on fully paid, commercially eligible subscriptions, and cannot be acquired using trial subscriptions, Azure free credits, sponsorship subscriptions, or promotional/prepaid credits, even if a credit card is attached.
Phone number availability is also determined by the subscription billing address, which must be in the United States for US numbers. When a subscription is not eligible for PSTN phone numbers, the Azure portal does not display an error and instead disables the Get button and country selector.
To proceed, Microsoft recommends using a different fully eligible paid subscription (Pay‑As‑You‑Go, EA, or CSP) or requesting a subscription eligibility review by contacting Azure Communication Services phone number onboarding at acstns@microsoft.com. Please comment below if you have any further queries.

Answer 2

For a US-based Pay-As-You-Go subscription, Azure Communication Services phone numbers are supported, but there are a few strict prerequisites and limitations that can cause the UI to appear disabled.

Key points from the documentation that apply:

1. Must be a paid subscription and eligible agreement type
   Phone numbers cannot be acquired with free credits or trial subscriptions. The eligible agreement types for US numbers are:
   • Toll-Free and Local (Geographic): Modern Customer Agreement (Field and Customer Led), Modern Partner Agreement (CSP), Enterprise Agreement, Pay-As-You-Go.
   This matches a standard Pay-As-You-Go subscription, so the agreement type itself is supported.
2. Billing location must be eligible for US numbers
   For US phone numbers (including 10DLC SMS), the subscription’s billing address must be in an eligible country/region. For 10DLC SMS, the table lists:
   • Canada
   • United States (excluding Puerto Rico)
   If the subscription billing address is not set to United States (or Canada for some scenarios), the country/region selector in the “Get phone number” wizard will not offer US numbers, and capabilities may be disabled.
3. Trial numbers and non-US billing addresses
   If the billing address is outside the United States, trial phone numbers are not available at all. Only paid numbers can be acquired, and only in the countries/regions allowed for that billing location.
4. Country/region availability is enforced by the portal wizard
   In the phone number purchase flow:
   • The wizard requires choosing a Country/region and number type (Local or Toll-free).
   • “Country/region availability is based on the billing location for your Azure subscription.”
     If the billing location does not match any of the allowed regions for the country you are trying to select, the country input can remain disabled or fail to populate.
5. General steps to purchase (to validate configuration)
   The expected working flow is:
   1. Go to the Communication Services resource in the Azure portal.
   2. Select Phone numbers in the left menu.
   3. Select Get to launch the shopping wizard.
   4. Choose Country/region (must be available for the subscription billing location).
   5. Choose Local or Toll-free and search.
   If step 4 never loads or is disabled, it indicates a subscription/billing-location eligibility issue rather than a per-resource setting.
6. When the desired number is unavailable or for special handling
   If the subscription is eligible but the portal still does not offer numbers (for example, due to inventory or special-order requirements), the documentation directs to the special-order process:
   • In the Phone Numbers section, select Request a Special Order.
   • Open a new case at the provided support link, select Azure Communication Service, choose the country/region, and select New TN Acquisition as the case type.

Given the symptoms (no country input, “Get” disabled) and the documented behavior, the most likely causes are:

• The Azure subscription billing address is not set to an eligible country/region for US numbers (United States or Canada for the 10DLC scenario), or
• The subscription type is not one of the supported agreement types listed for US numbers.

If the billing address and agreement type match the documented requirements and the portal still blocks the flow, the next step is to use the Request a Special Order / support case path described in the phone number quickstart and country/region eligibility documentation so that Azure Communication Services support can enable or provision numbers for the subscription.

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References:

• Phone number management for United States
• Quickstart: Get and manage phone numbers (platform-azp-new)
• Country/region availability of telephone numbers and subscription eligibility