---
title: "What Is Subdomain? Domain Glossary | Grit Brokerage"
description: "A subdomain is a prefix added to a domain name that creates a separate address under it, such as blog.example.com or shop.example.com. The domain owner..."
url: https://gritbrokerage.preview.multisites.ai/glossary/subdomain
publisher: Grit Brokerage
contact: https://gritbrokerage.preview.multisites.ai/contact
offer: https://gritbrokerage.preview.multisites.ai/inquiry
---

Registration and DNS

# Subdomain

A subdomain is a prefix added to a domain name that creates a separate address under it, such as blog.example.com or shop.example.com. The domain owner creates it with a DNS record at no extra registration cost.

## Why it matters

Subdomains let one owner run several sites or services from a single name. A company can host its app at app.example.com and its help center at help.example.com. For buyers, a subdomain on a platform is not the same as owning a domain, because the platform owner controls it. Sellers should note that subdomains add no resale value to the root name. Common mistake: a business builds its brand on a free subdomain, such as a site builder address, then finds it cannot move its search ranking or email to a real domain.

Source: [cloudflare.com](https://www.cloudflare.com/learning/dns/dns-records/)

[Read nextHow Much Is My Domain Worth? Domain Valuation Explained](https://gritbrokerage.preview.multisites.ai/guides/domain-name-valuation)

## Buying or selling a domain?

Call, text or email. Responsiveness is our trademark, and a broker answers, not a form robot.

[Talk to a broker](https://gritbrokerage.preview.multisites.ai/contact) [Call (442) 500-GRIT](tel:+1-442-500-4748)