# Quota

**Built-in Authoritative DNS Quota**

<table><thead><tr><th width="228.281982421875">Quota Item</th><th width="116.366455078125">Threshold</th><th>Description</th><th data-hidden>Remarks</th></tr></thead><tbody><tr><td><strong>Number of Domains (Zones)</strong></td><td>10</td><td>Each account can create up to 10 zones. Quota increase can be requested via support ticket.</td><td>Alibaba Cloud: 500</td></tr><tr><td><strong>Associated VPCs per Zone</strong></td><td>10</td><td>Each zone can be associated with up to 10 VPCs. Quota increase can be requested via support ticket.</td><td>Alibaba Cloud: 100</td></tr><tr><td><strong>Number of DNS Records per Zone</strong></td><td>3,000</td><td>Each zone can have up to 3,000 DNS records by default. Quota increase can be requested via support ticket.</td><td>Alibaba Cloud: 100,000</td></tr><tr><td><strong>Weighting Policy</strong></td><td>Supports A and AAAA</td><td>When multiple IPs are configured for the same host record, DNS responses return IPs based on pre-set weights, achieving load balancing.</td><td>Alibaba Cloud supports A, AAAA, CNAME</td></tr><tr><td><strong>Max Records per Host Record</strong></td><td>100</td><td>Each host record can have up to 100 associated DNS records. Quota increase can be requested via support ticket.</td><td>—</td></tr><tr><td><strong>Max DNS Queries per VM (In-VPC)</strong></td><td>1,000 QPS</td><td>Each VM in a VPC can handle up to 1,000 DNS queries per second. Exceeding this may trigger throttling; SLA (99.99%) cannot be guaranteed.</td><td>Alibaba Cloud: 5,000 QPS</td></tr><tr><td><strong>Max DNS Queries for All VMs (In-VPC)</strong></td><td>Unlimited</td><td>Total DNS queries for all VMs in a VPC are unlimited.</td><td>Alibaba Cloud: Unlimited</td></tr><tr><td><strong>Max External Recursive Queries per VM</strong></td><td>Unlimited</td><td>Single VM external recursive queries are not limited.</td><td>Alibaba Cloud: 600 QPS</td></tr><tr><td><strong>Max External Recursive Queries for All VMs in VPC</strong></td><td>Unlimited</td><td>Total external recursive queries for all VMs in a VPC are not limited.</td><td>Alibaba Cloud: 5,000 QPS</td></tr></tbody></table>


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# Agent Instructions: 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.console.zenlayer.com/welcome/elastic-compute/zdns-service/quota.md?ask=<question>
```

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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.