Subdomain Scan (2024)

FAQs

What are the disadvantages of subdomains? ›

Since Google sees your subdomain and main site separately, you have to attract backlinks to both websites. Host your blog on a subdomain, and you'll create more work for yourself without getting any additional benefits. The drawback of using subdomains for SEO? You have a lot more work — and for no reason.

This type of subdomain enumeration is resource-intensive and may have legal and ethical implications since sending large requests to a target domain is required. Because of its intrusive nature, active subdomain enumeration may trigger security alerts.

If you're using SEO as your primary way of generating traffic for your site, you might want to avoid subdomains. You want to create cohesiveness across your brand and that includes all aspects of your website. There's no reason you shouldn't put keyword-rich content on sales and product pages as well.

Google will not penalize international websites that exist on separate subdomains if they have duplicate content.

Google states that subdomains and subdirectories are both fine, but subdomains are crawled and tracked separately. Your subdomain will likely be on its own for SEO factors like link equity, and it probably won't pass link equity onto your main domain, either.

Ultimately, the best choice comes down to your SEO goals. Subdomains give you an opportunity to target niche audiences, but they require extra management. Sometimes a well-optimized main domain can be enough to boost your SERP rankings over time.

However, Google treats subdomains as separate sites.

While “blog.example.com” and “example.com” may share a root domain, Googlebot will view them as distinct domains and crawl and index them accordingly.

Subdomain hijacking, also known as dangling DNS, occurs when a threat actor gains control of a subdomain of a legitimate domain.

Do I own a subdomain if I own a domain? ›

Yes. You may need to check what your hosting provider will actually provide, and if there are costs involved, but for most, there are few limits, and most provide email service and subdomains as part of the bundle. Yes, it's your domain name. You can do what you want as far as creating sub domains and email addresses.

SSL certificates can be of many types including single domain SSL, multi domain SSL, wildcard SSL, etc. SSL certificates can secure main domains, subdomains, and multi-level domains.

Subdomain Spoofing

This deceitful tactic dupes oblivious victims into entering their login credentials or engaging with the malicious subdomain, thereby granting unauthorized access to their sensitive data or accounts.

Each domain name can have up to 500 subdomains. You can also add multiple levels of subdomains, such as info.blog.yoursite.com. A subdomain can be up to 255 characters long, but if you have multiple levels in your subdomain, each level can only be 63 characters long.

While HTTPS encrypts the entire HTTP request and response, the DNS resolution and connection setup can reveal other information, such as the full domain or subdomain and the originating IP address, as shown above. Additionally, attackers can still analyze encrypted HTTPS traffic for “side channel” information.

A subdomain is a domain that is part of a larger domain. Each label may contain from 0 to 63 octets. The full domain name may not exceed a total length of 253 ASCII characters in its textual representation.

Your subdomain reputation(s) can impact base domain reputation, but the impact between subdomains will be small. Subdomains are not a way to avoid a bad domain reputation. Instead, they will help differentiate your traffic while maintaining a clear relationship with your main domain.

Subdomains are not inherently slower than main domains. The speed of your websites (including subdomains) depends entirely on your hosting provider and what kind of service they have.