---
title: Infrastructure
description: Infrastructure details for the 1.1.1.1 resolver network.
image: https://developers.cloudflare.com/cf-twitter-card.png
---

> Documentation Index  
> Fetch the complete documentation index at: https://developers.cloudflare.com/1.1.1.1/llms.txt  
> Use this file to discover all available pages before exploring further.

[Skip to content](#%5Ftop) 

# Infrastructure

* [ Network operators ](https://developers.cloudflare.com/1.1.1.1/infrastructure/network-operators/)
* [ Support for IPv6-only networks ](https://developers.cloudflare.com/1.1.1.1/infrastructure/ipv6-networks/)
* [ Extended DNS error codes ](https://developers.cloudflare.com/1.1.1.1/infrastructure/extended-dns-error-codes/)
* [ SLA and technical support ](https://developers.cloudflare.com/1.1.1.1/infrastructure/sla-and-support/)

```json
{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"/directory/","name":"Directory"}},{"@type":"ListItem","position":2,"item":{"@id":"/1.1.1.1/","name":"1.1.1.1 (DNS Resolver)"}},{"@type":"ListItem","position":3,"item":{"@id":"/1.1.1.1/infrastructure/","name":"Infrastructure"}}]}
```