# Phone Numbers

DID numbers are the foundation of your DIDWW setup. Use this section to buy numbers, transfer existing numbers to DIDWW,
and manage numbers assigned to your account.

Start with **Buy Numbers** or **Number Porting** to add numbers to your account. After assignment, use **My Numbers** to
manage trunks, services, capacity, and billing.

## Set up and manage numbers

Buy, transfer, manage, and review billing for DID numbers.

**Buy numbers**

Search available DID numbers, review pricing and registration requirements, and complete checkout.

[Buy numbers](buy-numbers/index.html)

**Number porting**

Check portability, create porting requests, track porting numbers, and review port-out requests.

[Number porting](number-porting/index.html)

**My numbers**

Manage DID numbers already assigned to your account, including trunks, services, capacity, billing cycles, and batch
actions.

[My Numbers](my-numbers/index.html)

**Number billing**

Understand setup fees, monthly fees, billing periods, incoming rates, orders, payments, receipts, and invoices.

[Number billing](number-billing.html)

## Configure capacity and configuration profiles

Manage inbound call capacity and reusable voice, SMS, and capacity settings.

**Capacity**

Manage included, dedicated, shared, and metered inbound call capacity for DID numbers and Capacity groups.

[Capacity](capacity/index.html)

**Configuration profiles**

Reuse voice, SMS, and capacity settings across DID numbers, or apply them automatically with rules.

[Configuration profiles](configuration-profiles/index.html)

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