> For the complete documentation index, see [llms.txt](https://docs.dcalls.org/dcalls/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.dcalls.org/dcalls/virtual-number-did/what-are-dids.md).
# What are DIDs?
A DID (Direct Inward Dialing) number or a Virtual Number (you can also see a 'DDI' term) is a local phone number in a country. And that's what we can help you with as well!
There are two options:
1. Renting a number for receiving phone calls only;
2. Renting a number for voice calls and SMS.
Open the 'Virtual numbers' section in your dCalls account or [follow that link](https://app.dcalls.org/did). There you can see several tabs:
1. Description, well, describes what DIDs are :)
2. 'My numbers' section gives you the list of phone numbers you own;
3. Use the 'Add a number' section to pick and purchase a number;
4. The 'SMS Logs' and the 'Call Logs' saves the history of received messages and phone calls.
---
# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.
## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter:
```
GET https://docs.dcalls.org/dcalls/virtual-number-did/what-are-dids.md?ask=
```
The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.