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coresite.com

https://coresite.com· First analyzed 14 May 2026· Updated 14 May 2026
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coresite.com
Desktop screenshot of coresite.com
Mobile screenshot of coresite.com
Mobile

Sponsored

Hosting Provider

HubSpot CMS
hubspot.com

IP Address

199.60.103.20

Site Location

🇺🇸 United Statesvia phone

Server Location

🇺🇸 Cambridge, United States

ASN

AS209242

Organization

HubSpot, Inc.

Server

Cloudflare

CDN

Cloudflare

WAF

Cloudflare

Nameservers

ns-437.awsdns-54.com.ns-874.awsdns-45.net.ns-1194.awsdns-21.org.ns-1952.awsdns-52.co.uk.

Performance

98

Core Web Vitals

Weight

First Contentful Paint
909 ms10%
Speed Index
1.2 s10%
Largest Contentful Paint
—25%
Total Blocking Time
0.0 ms30%
Cumulative Layout Shift
0.00025%
5.2 MB
158 requests

Image Optimization

Lazy LoadWebPResponsive
0–49
50–89
90–100

Architecture Stack

Monolithic
⚙️ SSR
HubSpot CMS

Technology Stack

12 Technologies Detected

Analytics

3
Google Analytics
Google Analytics 4
Hotjar

UI Components

2
SwiperLightbox

Advertising

2
LinkedIn AdsMicrosoft Advertising

Other

1
AOS (Animate On Scroll)

CSS Frameworks

1
Tailwind CSS

Tag Managers

1
Google Tag Manager

Marketing

1
HubSpot

CDN

1
Cloudflare

SEO Analysis

A83/100
26
4
0
Meta Tags14/15
Content10/12
Headings8/8
Technical23/25
E-E-A-T2/7
Images7/7
Links5/5
URL5/5
Social5/5
Freshness0/4
Mobile1/4
Indexability3/3
C
coresite.comcoresite.com

CoreSite | Secure, High-Performance Data Centers

CoreSite provides the foundation for your hybrid IT infrastructure with high-performance colocation, interconnected data center campuses and cloud onramps.

Title Length48 chars

Recommended: 50-60 chars (~291px / 580px)

Description Length157 chars

Recommended: 120-160 chars

Issues (0)

    4 issues found

    Upgrade to view details

    Crawlability

    Sitemap

    Type: standard

    757 URLs

    robots.txt

    6 rules

    Local SEO

    Local Search Readiness

    41/100
    Fair
    12 9

    Sponsored

    AI & LLM Readiness

    D43/100
    Bot Access
    20/25
    Machine Read.
    7/25
    Schema Data
    3/25
    Citation
    13/25

    AI Bot Access

    14/14 accessible
    AI Search
    OAI-SearchBot
    PerplexityBot
    Claude-SearchBot
    Gemini-Deep-Research
    DuckAssistBot
    Training
    GPTBot
    ClaudeBot
    Google-Extended
    Meta-ExternalAgent
    Bytespiderinfo
    Amazonbot
    Applebot-Extended
    CCBotinfo
    Fetch
    ChatGPT-User

    Machine Readability

    llms.txt
    llms-full.txt
    Semantic HTML
    Heading Hierarchy
    Text ratio:3%
    Words:1,055
    Token eff.:Optimal

    Structured Data

    2 JSON-LD
    Organization×1.1VideoObject

    Citation Readiness

    Opening Summary38w
    Descriptive Headingsavg 4.3w
    Canonical URL
    Open Graph3/3
    Twitter Card3/3
    Language Tag
    Publish Date
    Author Info
    Lists
    Tables
    TL;DR / Summary
    About Page Link
    Recommendations (11)
    AI readiness recommendation preview...
    Upgrade to view recommendations

    Sponsored

    Accessibility

    WCAG 2.1 Compliance

    Evaluates how accessible your website is for users with disabilities, based on WCAG 2.1 guidelines. Checks images, forms, keyboard navigation, ARIA roles, and color contrast.
    A
    87/100
    13
    Passed
    2
    Critical
    0
    Warnings
    Images & Alt Text
    20/20
    Checks if images have descriptive alt text for screen readers and visually impaired users.
    Semantic Structure
    17/20
    Evaluates proper use of HTML5 semantic elements (header, nav, main, footer) and heading hierarchy.
    Forms & Inputs
    15/15
    Verifies form fields have labels, error messages are clear, and inputs are properly associated.
    Color & Contrast
    15/15
    Tests text-to-background color contrast ratios against WCAG AA/AAA minimum requirements.
    Keyboard & Focus
    11/15
    Ensures all interactive elements are reachable and operable via keyboard (tab, enter, escape).
    ARIA & Roles
    9/15
    Checks correct use of WAI-ARIA attributes (roles, states, properties) for assistive technologies.

    Carbon Footprint

    SWDM v4 · Eco-Score

    Carbon emissions estimated using the Sustainable Web Design Model v4 (SWDM v4). Factors in data center, network, and device energy across new and returning visitors. Grade thresholds based on HTTP Archive percentiles.
    31/100
    F
    664 mg
    CO₂e / view
    5.2 MB
    Page Weight
    15%
    Cleaner Than
    New Visitor
    759 mg
    vs
    Returning (cached)
    379 mg
    Annual (10K/mo)
    79.7 kg
    Emission Segments
    Data Center
    148 mg
    Network
    159 mg
    Device
    356 mg
    Resource Breakdown
    JavaScript
    543.0 KB
    Images
    149.6 KB
    CSS
    598.8 KB
    HTML
    27.2 KB
    Other
    4.0 MB
    Green Hosting Not Verified
    HubSpot CMS
    6 recommendations
    • •Carbon footprint recommendation preview...
    Upgrade to view recommendations
    C

    Security Score

    66%Fair
    Interactive

    HTTPS

    WAF

    80d

    Certificate Details

    Type

    Domain Validated (DV)

    Certificate Authority

    Google Trust Services

    Key Algorithm

    ECDSA (secp256r1) (256 bit)

    Signature

    ECDSA with SHA-256

    TLS Version

    TLSv1.3

    HTTP Protocol

    HTTP/2+H3

    Valid From

    05.05.2026

    Valid Until

    03.08.2026

    OCSP Stapling

    Enabled

    Subject Alternative Names (1)

    www.coresite.com

    SHA-256 Fingerprint

    35:D3:03:D5:0D:D9:60:E0:45:F0:E6:25:58:F4:63:B2:90:58:EA:FB...

    Top Recommendations

    Security recommendation preview

    Upgrade to view recommendations
    Upgrade to view header details

    HTTP Headers

    Developer Console

    alt-svc
    h3=":443"; ma=86400
    cache-control
    🟡 5s(s-maxage=36000, max-age=5)
    cf-ray🇮🇹 Milan
    9fbb21c95c46edb0-MXP
    content-encoding
    ⚡ Brotli(br)
    content-security-policy
    upgrade-insecure-requests
    content-type
    text/html; charset=UTF-8
    Good Warning Issue

    Email Infrastructure

    Microsoft 365

    Score

    100

    SPF
    DKIM
    DMARC

    DMARC Policy

    Reject (Strictest)

    MX Records (3)

    us-smtp-inbound-2.mimecast.com
    us-smtp-inbound-1.mimecast.com
    coresite-com.mail.protection.outlook.com

    Domain Information

    coresite.com

    Domain Age
    24y 2m

    Created

    21.02.2002

    Expires

    21.02.2027

    Last Updated

    17.01.2026

    Registrar

    Amazon Registrar, Inc.

    DNSSEC
    Not Enabled

    Privacy & Compliance

    Cookiebot

    Cookie Consent Banner
    Cookiebot
    Privacy Policy
    Terms of Service

    GDPR Indicators

    Cookie consent banner detected
    CMP: Cookiebot
    Privacy policy page linked
    Data Protection Officer mentioned

    Mobile Compatibility

    Viewport & Responsive Test

    Tests how well your website works on mobile devices. Checks viewport configuration, responsive layout, touch targets, font readability, and simulates rendering across different screen sizes.
    A
    81/100
    Mobile Friendly29 breakpoints
    Viewport Meta
    The viewport meta tag tells mobile browsers how to scale the page. Without it, mobile devices render at desktop width.
    Responsive Design
    Uses CSS media queries or flexible layouts to adapt content to different screen sizes automatically.
    Touch Icons
    Apple touch icons and favicons displayed when users add the site to their home screen on mobile devices.
    Readable Font Size
    Base font size should be at least 16px on mobile to ensure text is readable without zooming.
    Relative Units
    Using em, rem, %, or vw instead of fixed px values allows content to scale properly across screen sizes.
    No H-Scroll Risk
    No elements wider than the viewport that would cause horizontal scrolling on mobile devices.
    Tap Targets OK
    Interactive elements (buttons, links) are at least 48x48px with enough spacing to prevent accidental taps.
    No Fixed Widths
    No elements with fixed pixel widths that could overflow on smaller screens and break the layout.
    Viewport
    width=device-width, initial-scale=1
    1 recommendation
    • •Mobile compatibility recommendation preview...
    Upgrade to view recommendations

    Typography & Readability

    Montserrat + Rubik

    WCAG Partial
    73/100
    Readability
    /30
    19/30

    16px · LH 1.75

    Hierarchy
    /20
    20/20

    3.12x ratio · ✓ H1→H6

    WCAG
    /25
    16/25

    1:1 min contrast

    Performance
    /25
    18/25

    2 fonts · 5 req

    Heading Font

    Montserrat

    Sans50px

    Body Font

    Rubik

    Sans16px

    Contrast Ratio

    1:1

    5 issues

    Reading Comfort

    ~35 CPL

    Narrow lines
    50px
    h1
    32px
    h2
    30px
    h3
    28px
    h4
    16px
    p

    ✅ Excellent readability: 16px body text is ideal for all devices.

    ❌ Very complex text: Flesch score 22/100. Consider shorter sentences and simpler words.

    ⚠️ Partial contrast: 5 elements below WCAG AA threshold (min 1.0:1).

    ✅ Perfect heading hierarchy: Sequential h1→h2→h3 with single H1 — ideal for SEO & accessibility.

    ✅ Strong hierarchy: Headlines are 3.1x larger than body text.

    ✅ Lean font stack: 2 font families keeps load times fast.

    Buy on MyFontsFlesch 22

    Color Palette

    10 unique colors
    14.82:1 AAA Light
    #ffffff
    Background· 23.4%
    #25282b
    Text· 6.2%
    #c1dff3
    Accent· 13.7%
    #0072d0
    Primary· 7.1%
    #755048
    Secondary· 6.3%
    #d8edf9
    Accent· 5.8%
    #778592
    Secondary· 5.6%
    #9fbfd5
    Secondary· 2.8%

    Business & Marketing Stack

    7 Tools Detected

    Enterprise

    CRM Systems

    1
    HubSpotMid-Market

    Customer Relationship Management platforms

    Behavior Analytics

    3
    Google Tag ManagerFree
    Google AnalyticsFree
    HotjarMid-Market

    User behavior and product analytics

    Advertising

    2
    LinkedIn AdsEnterprise
    Microsoft AdsEnterprise

    Ad platforms and retargeting pixels

    Privacy & Cookies

    1
    CookiebotMid-Market

    Cookie consent and privacy compliance tools

    4

    Categories

    7

    Total Tools

    2

    Enterprise

    3

    Mid-Market

    Assessment: Sophisticated marketing and sales technology infrastructure

    Sponsored

    Scripts & Styles

    30 Resources

    20
    Scripts
    10
    Styles
    13
    Async
    0
    Defer

    Top Script Sources

    googletagmanager.com(3)snap.licdn.com(2)google-analytics.com(2)static.hotjar.com(1)bat.bing.com(1)

    Website Identity

    coresite-intersection-of-interconnection-video-(1080p)

    coresite-intersection-of-interconnection-video-(1080p)

    VideoObject

    a CoreSite – The Intersection of Interconnection video

    +18667772673
    www.coresite.com
    24 years old

    1001 17th Street, Denver

    80202, Denver, CO

    Location detected: 🇺🇸 United Statesvia phone
    Amazon Registrar, Inc.📧 Microsoft 365en

    Social Profiles

    LinkedInYouTube

    Sponsored

    Last analyzed: 14 May 2026 at 16:03

    Historical Analysis & Change Tracking