Coding⏱️ 3 min read📅 2026-06-11

How to Fix: How to solve Fastly error: unknown domain

Error occurs when trying to make HTTP request using IP address instead of domain name. Solution involves using the correct domain name or service.

Quick Answer: Use the correct domain name or service for the requested website, as Fastly error indicates that the provided IP address is not associated with a service.

📋 Table of Contents

  1. 🔍 Why This Happens
  2. 🚀 How to Resolve This Issue
  3. ✨ Wrapping Up

The 'Fastly error: unknown domain' issue occurs when you attempt to make an HTTP request to a domain that has not been added to a service in Fastly, a content delivery network (CDN) that helps improve website performance. This error affects users who rely on Fastly for their online applications and services.

This error can be frustrating because it prevents users from accessing the intended content. However, there is a solution to resolve this issue by identifying the correct domain and service configuration in Fastly.

🔍 Why This Happens

  • The primary reason for this error is that the specified domain (151.101.193.69) has not been added to a service in Fastly. This can occur when a new domain is introduced without proper setup or configuration.
  • An alternative reason may be due to incorrect DNS settings or an incomplete domain configuration, which prevents Fastly from recognizing the domain.

🚀 How to Resolve This Issue

Adding the Domain to a Service

  1. Step 1: Step 1: Log in to your Fastly account and navigate to the 'Services' tab. Click on the 'Create Service' button.
  2. Step 2: Step 2: Enter the domain name (151.101.193.69) and select the appropriate service configuration (e.g., cache-mxp19846-MXP).
  3. Step 3: Step 3: Configure any additional settings as needed, such as caching rules or SSL/TLS certificates.

Using a Known Working Domain

  1. Step 1: Step 1: Identify a known working domain (e.g., stackoverflow.com) that is already configured in Fastly.
  2. Step 2: Step 2: Use the known working domain to make an HTTP request using the `requests` module. Verify that the request returns the expected response.

✨ Wrapping Up

To resolve the 'Fastly error: unknown domain' issue, follow the steps outlined above. Adding the domain to a service in Fastly or using a known working domain can help you access the intended content. If you continue to encounter issues, contact your website administrator or Fastly support for assistance.

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