costar.com
Access Denied
Last scanned Jul 25, 2026, 2:25 PM · 1 view
Overall score
Fair
Summary
This website is hosted on AKAMAI-AS - Akamai Technologies, Inc., US. SEO is fair (60/100) and accessibility is good (85/100). Security scores fair (65/100) and performance excellent (100/100). Top issue: Missing meta description.
- United States
- Hosted on AKAMAI-AS - Akamai Technologies, Inc., US
Top issues to fix
12 issues found · 4 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.
Missing meta description
SEOAdd a ~150-character meta description to control your search-result snippet and lift click-through rate.
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.
Missing X-Frame-Options header
SecurityAdd X-Frame-Options (or a CSP frame-ancestors rule) to prevent clickjacking via hidden iframes.
+6 more issues — details in the sections below.
SEO
6 issue(s) found
Performance
13 ms
Security
HTTPS & header checks
Accessibility
2 issue(s) found
Meta tags
- Title
- Access Denied
- Description
- Canonical
- Language
- Charset
- Viewport
- Robots meta
- Manifest
Technologies
Detected frameworks, languages, and tools.
No technologies detected.
Hosting & CDN
- Hosting provider
- AKAMAI-AS - Akamai Technologies, Inc., US
- CDN provider
- —
- IP address
- 104.120.82.11
- ASN
- AS16625 (AKAMAI-AS - Akamai Technologies, Inc., US)
DNS records
| Type | Value |
|---|---|
| A |
|
| AAAA | — |
| MX |
|
| TXT | — |
| NS |
|
| CAA |
|
| CNAME | — |
| IPv6 support | No |
TLS / SSL certificate
- Version
- TLS 1.3
- Issuer
- DigiCert Inc
- Subject
- gateway.costar.com
- Valid from
- Apr 22, 2026
- Valid to
- Nov 6, 2026
- Days until expiry
- 104
- SAN domains
- gateway.costar.com, ads.csgpmarketplace.com, ahprd1cdn.csgpimgs.com, ahprd2cdn.csgpimgs.com, ahprd3cdn.csgpimgs.com, ahprd4cdn.csgpimgs.com, ahprdcdn1.costar.com, ahprdcdn1.csgpimgs.com, ahprdcdn2.costar.com, ahprdcdn2.csgpimgs.com, ahprdcdn3.costar.com, ahprdcdn3.csgpimgs.com, ahprdcdn4.costar.com, ahprdcdn4.csgpimgs.com, auth.bizquest.com, auth.costargroup.com, authx.costargroup.com, belbex.com, costar.co.uk, costar.com, costargroup.com, costarmobile.costar.com, crm.costar.com, ecom.csgpmarketplace.com, entrepots.grecam.com, extranet.grecam.com, fieldresearch-bff.costargroup.com, fulfillment.csgpmarketplace.com, gateway-prd.costar.com, grecam.com, images1.cityfeet.com, images1.showcase.com, images2.showcase.com, images3.showcase.com, images4.showcase.com, investor.costargroup.com, investors.costargroup.com, ir.costargroup.com, listingmanager.costar.com, m.showcase.com, marketingcenter.costar.com, mobile.costar.com, mobilebff.costar.com, oih.grecam.com, order.csgpmarketplace.com, partner-auth.costargroup.com, payments.csgpmarketplace.com, pds.cityfeet.com, pds.costar.com, pds.showcase.com, pds1.costar.com, pds2.costar.com, pds3.costar.com, preferences.costargroup.com, pricing.csgpmarketplace.com, product.costar.com, product1.costar.com, product2.costar.com, product3.costar.com, productmgmt.csgpmarketplace.com, property.costar.com, property2.costar.com, property3.costar.com, registration.costargroup.com, s.csgpimgs.com, secure.belbex.com, secure.costargroup.com, showcase-app.costar.com, showcase-prd.costar.com, signtechmobilebff.costargroup.com, subscription.csgpmarketplace.com, t0.products.costar.com, t0.property.costar.com, t0.property2.costar.com, t0.property3.costar.com, t1.products.costar.com, t1.property.costar.com, t1.property2.costar.com, t1.property3.costar.com, t2.products.costar.com, t2.property.costar.com, t2.property2.costar.com, t2.property3.costar.com, tax.csgpmarketplace.com, vapi.costar.com, vapi.costargroup.com, we.costar.com, widget.csgpmarketplace.com, www.belbex.com, www.costar.co.uk, www.costar.com, www.costargroup.com, www.grecam.com
Security headers
- Strict-Transport-SecurityMissing
- Content-Security-PolicyMissing
- X-Frame-OptionsMissing
- X-Content-Type-OptionsMissing
- Referrer-PolicyMissing
- Permissions-PolicyMissing
Compression: none · 0 cookie(s) observed
Content & assets
Headings
H1 1 · H2 0 · H3 0
Links
0 internal · 0 external · 0 broken
Images
0 total · 0 missing alt
Scripts / Styles
0 scripts · 0 stylesheets
JS / CSS size
0 B · 0 B
Page size
360 B
Robots.txt & Sitemap
- robots.txt
- Not found
- Disallow rules
- 0
- sitemap.xml
- Not found
- URLs in sitemap
- 0
SEO issues
- Missing meta description
- Missing canonical link
- No structured data (JSON-LD) found
- Missing OpenGraph tags
- robots.txt not found
- sitemap.xml not found
Accessibility issues
- Missing <html lang> attribute
- Missing viewport meta tag
Scan details
- Requested URL
- https://costar.com
- Final URL
- https://costar.com
- HTTP status
- 403
- HTTP version
- HTTP/2
- Response time
- 13 ms
- HTML size
- 360 B
- Redirect chain
- https://costar.com
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Frequently asked questions
- What technology does costar.com use?
- We did not detect any specific technologies for costar.com in the latest scan.
- Is costar.com secure (HTTPS)?
- Yes. costar.com uses TLS 1.3 with a certificate issued by DigiCert Inc, valid until Nov 6, 2026.
- Who hosts costar.com?
- costar.com is hosted on AKAMAI-AS - Akamai Technologies, Inc., US.
- What is costar.com's SEO score?
- costar.com scored 60/100 for SEO in the latest analysis (fair).
- What is costar.com's overall website score?
- costar.com has an overall SiteGraph score of 76/100, combining SEO, performance, security, and accessibility.
OpenGraph & Twitter Card
OpenGraph
Twitter Card