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Domain report

kopperfield.com

kopperfield.com ranks in the top 0.18% of domains by connectivity (Common Crawl, cc-main-2026-jul-aug-sep), with 5 distinct hosts observed under it.

Explore kopperfield.com in the Web Graph

Connectivity

#244,234harmonic-centrality rank
Top percentile
0.18%
Hosts observed
5

From the Common Crawl cc-main-2026-jul-aug-sep hyperlink graph, 133,241,980 domains total. What this rank means

HTTPS reachability

200HTTP status

https://kopperfield.com/ answered with HTTP 200.

DNS records

A
  • 76.76.21.21
AAAA
No records found.
MX
  • 5 alt1.aspmx.l.google.com.
  • 1 aspmx.l.google.com.
  • 5 alt2.aspmx.l.google.com.
  • 10 alt3.aspmx.l.google.com.
  • 10 alt4.aspmx.l.google.com.
NS
  • ns51.domaincontrol.com.
  • ns52.domaincontrol.com.

Live preview

Screenshot of kopperfield.com

This site sends "X-Frame-Options: SAMEORIGIN", which blocks embedding it here.

Since kopperfield.com can't be embedded live, this is a captured screenshot instead — a snapshot from whenever it was last rendered, not necessarily this exact moment.

Domain registration (WHOIS / RDAP)

RDAP lookup failed (HTTP 429).

How to read WHOIS and RDAP data

SSL certificate

Certificate Transparency lookup failed (HTTP 429).

How to check when a certificate expires

HTTP & security headers

Response

Server
cloudflare
Content-Type
text/html; charset=utf-8
Cache-Control
private, no-cache, no-store, max-age=0, must-revalidate
Content-Encoding
Not sent

Security

Content-Security-Policy
frame-ancestors 'self' https://builder.io https://*.builder.io
Strict-Transport-Security
max-age=63072000
X-Frame-Options
SAMEORIGIN
X-Content-Type-Options
Not sent
Referrer-Policy
Not sent
Permissions-Policy
Not sent

What each security header does

Redirect chain

  1. 1.http://kopperfield.com/HTTP 308

    → https://kopperfield.com/

  2. 2.https://kopperfield.com/HTTP 308

    → https://www.kopperfield.com/

  3. 3.https://www.kopperfield.com/HTTP 200

Meta tags

Title
Smarter software for electricians | Kopperfield
Description
Discover the tools that make permit paperwork easy for electricians and electrical contractors, including load calculations, line diagrams, and panel schedules.
Canonical
https://www.kopperfield.com
Robots
Not set
Generator
Not set
Open Graph title
Smarter software for electricians | Kopperfield
Open Graph description
Discover the tools that make permit paperwork easy for electricians and electrical contractors, including load calculations, line diagrams, and panel schedules.
Open Graph image
https://www.kopperfield.com/images/nav/open_graph.png
Open Graph type
Not set
Twitter card
summary_large_image
Twitter title
Smarter software for electricians | Kopperfield
Twitter image
https://www.kopperfield.com/images/nav/open_graph.png

robots.txt

Disallow rules (User-agent: *)
10
Disallow rules (other agents)
30

Sitemap declared:

  • https://www.kopperfield.com/sitemap.xml

Technology detected

Best-effort, based on a small set of well-known signals — this may be incomplete.

  • Cloudflarecdn

    Server: cloudflare

  • Next.jsframework

    X-Powered-By: Next.js

  • Google Tag Manageranalytics

    Found "googletagmanager.com/gtm.js" in the page's HTML

Related domains

Similar connectivity

Domains ranked just above and below it in the same snapshot.