plcs.net website report
Your Personal PLC Tutor - Learn PLC Programming Here. FREE
Last scanned · 1 view
Overall score
Fair
About plcs.net
plcs.net is a website. It describes itself as “The BEST place to Learn PLC Programming”. The site is hosted on PRIVATESYSTEMS - PrivateSystems Networks, US.
Score profile
Top issues to fix
13 issues found · 5 high priority
Missing Strict-Transport-Security header
SecurityAdd HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
SecurityAdd a CSP to control which sources can run scripts — the strongest single defense against XSS.
No H1 heading found
SEOAdd exactly one H1 describing the page's main topic — it anchors the document outline for search engines and screen readers.
Over half of images are missing alt text
AccessibilityAdd alt attributes to images — screen readers depend on them, and they help image SEO.
Missing viewport meta tag
AccessibilityAdd <meta name="viewport" content="width=device-width, initial-scale=1"> — without it the site is broken on mobile.
Missing X-Content-Type-Options header
SecurityAdd X-Content-Type-Options: nosniff to stop MIME-sniffing attacks.
+7 more issues — details in the sections below.
How it compares
plcs.net scores higher overall than 12% of the 163,243 sites we have scanned.
vs. All scanned sites
163,243 sitesThe dot is this site; the tick is the typical (median) score for the group. The number on the right is the percentile: the share of the group this site scores above.
Technology stack
No technologies were detected in the latest scan.
Hosting & DNS
plcs.net is hosted on PRIVATESYSTEMS - PrivateSystems Networks, US (servers registered in US).
- IP address
- 158.106.137.214
- ASN
- AS63410 · PRIVATESYSTEMS - PrivateSystems Networks, US
- IPv6
- Not supported
- HTTP
- HTTP/2
Show DNS record values
- A
- 158.106.137.214
- MX
- plcs.net
- NS
- cp4.privatesystems.net, cp1.privatesystems.net, cp3.privatesystems.net, cp2.privatesystems.net
TXT record contents are not republished; only their count is shown.
Security
plcs.net uses TLS 1.3 with a certificate valid for 47 more days and sets 0 of 6 recommended security headers.
Security headers0 of 6 set
- HSTSForces HTTPS
- CSPBlocks injected scripts
- X-Frame-OptionsStops clickjacking
- X-Content-TypeStops MIME sniffing
- Referrer-PolicyLimits URL leakage
- Permissions-PolicyRestricts browser features
TLS certificate
- Names covered
- 6
- Cookies set
- 0
Email security
plcs.net scores F for email security, with SPF and no DMARC policy.
- SPFWeak
Marks unlisted senders as suspicious (~all) but does not reject them.
- DMARCNot set
No DMARC policy: forged mail is not told to be rejected.
- MTA-STSNot set
Not published; mail to this domain can be downgraded to plaintext.
- BIMINot set
Not published (optional).
Performance & carbon
plcs.net scores 100/100 for performance, with an estimated load time of 0.3 s. A visit emits an estimated 0.29 g of CO2 (grade B).
Page weight
- HTML 15.5 KB
- JavaScript 770 KB
- CSS 5.0 KB
- Est. load
- 260 ms
- Response
- 260 ms
- Scripts / CSS
- 7 / 1
Carbon per visitB
0.29 g CO2 per uncached view
Estimate from the Sustainable Web Design model. HTML, JavaScript and CSS only; images, video and fonts are not measured. Treat it as a lower bound for comparing pages, not an audit.
SEO & accessibility
plcs.net scores 65/100 for SEO and 45/100 for accessibility, with 5 SEO issues to fix.
Heading structure
No H1 found.
Image alt text
18 images · 13 without alt text · 0 lazy-loaded
Links
- Internal 12
- External 2
- Broken 1
SEO issues5
- Missing canonical link
- No H1 heading found
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- sitemap.xml not found
Accessibility issues4
- Over half of images are missing alt text
- No H1 heading found
- Missing <html lang> attribute
- Missing viewport meta tag
Technical details
Page metadata, social tags, crawl files and scan information.
Meta tags
- Title
- Your Personal PLC Tutor - Learn PLC Programming Here. FREE
- Description
- The BEST place to Learn PLC Programming... Always FREE of course.
- Canonical
- Language
- Robots meta
Crawl files
- robots.txt
- Found
- Disallow rules
- 2
- sitemap.xml
- Not found
- URLs in sitemap
- 0
Structured data
No JSON-LD types declared.
- Microdata items
- 0
- RDFa items
- 0
Scan
- Final URL
- https://plcs.net
- HTTP status
- 200
- Redirects
- https://plcs.net
- Scanned
- Aug 24, 2026, 1:22 PM
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Frequently asked questions about plcs.net
- What is plcs.net?
- plcs.net is a website. It describes itself as “The BEST place to Learn PLC Programming”. The site is hosted on PRIVATESYSTEMS - PrivateSystems Networks, US.
- Who hosts plcs.net?
- plcs.net is hosted on PRIVATESYSTEMS - PrivateSystems Networks, US (servers registered in US).
- Is plcs.net secure?
- plcs.net uses TLS 1.3 with a certificate valid for 47 more days and sets 0 of 6 recommended security headers.
- Is plcs.net protected against email spoofing?
- plcs.net scores F for email security, with SPF and no DMARC policy.
- How does plcs.net compare with similar sites?
- plcs.net scores higher overall than 12% of the 163,243 sites we have scanned.
- What is plcs.net's overall score?
- plcs.net has an overall SiteGraph score of 70/100, combining SEO (65), performance (100), security (65) and accessibility (45).
Open Graph & Twitter