activecalculus.org
Registered
Page analyze update date:
2026/02/20 08:42:04
Last whois update date:
2026/03/27 09:55:14
Domain Status
Registered
Paid till
17.08.2026
Available from
16.09.2026
×
![Fullscreen website screenshot]()
activecalculus.org Website screenshot
SEO Score
54.79%
80
Score achieved
146
Maximum score
Main Information
Title: Active Calculus | Free resources for students; free and open-source materials for instructors.
Description: empty
Keywords: empty
Page Encoding:
utf-8
Page Filesize: 64 KB
Server Information
IP: 106.0.62.83
Location: United States,US,Phoenix,85001,33.4532,-112.0748,America/Phoenix
Http Server: litespeed
Encoding: utf-8
Powered by: php/8.1.34
Meta Tags List
- charset: UTF-8
- name: robots content: max-image-preview:large
- name: generator content: WordPress 6.9.1
- name: viewport content: width=device-width, minimum-scale=1.0, maximum-scale=1.0
Internal Links
External Links
Whois Information
domain_name: activecalculus.org
update_date: 2025-07-23T05:45:38.724Z
update_time: 1753249538
creation_date: 2017-08-17T02:28:42.429Z
creation_time: 1502936922
expiration_date: 2026-08-17T02:28:42.429Z
Whois Raw Data
Domain Name: ACTIVECALCULUS.ORG
Registrar: NameCheap, Inc.
Domain Status: client transfer prohibited
Registry Expiry Date: 2026-08-17T02:28:42.429Z
Creation Date: 2017-08-17T02:28:42.429Z
Updated Date: 2025-07-23T05:45:38.724Z
Name Server: NS1.A2HOSTING.COM
Name Server: NS2.A2HOSTING.COM
REGISTRAR Contact: NameCheap, Inc.
>>> Last update of RDAP database: 2026-03-27T09:55:14Z
Robots.txt
User-agent: *
Crawl-Delay: 20
SEO Audit
Technical SEO
✓
Response Code
200
Status 200 OK - page loads correctly.
✓
Character Encoding
Page: utf-8, Header: utf-8
Character encoding consistent between HTML and headers.
✓
Page Size
65779 bytes
Page size acceptable for fast loading.
✓
Resources
35 total
Moderate number of resources. Consider combining files.
✓
Hreflang Tags
0 hreflang tags
Add hreflang tags if you have multilingual content.
✓
Robots.txt
Exists
Robots.txt file found.
!
Sitemap
Not found
Add sitemap.xml and reference it in robots.txt.
✓
HTTPS
Yes
Secure HTTPS connection enabled.
!
Compression
br
Enable gzip or zstd compression to reduce file sizes.
!
Caching
Not set
Add cache-control headers to improve loading speed for returning visitors.
✓
Page Speed
7.35 ms
Excellent loading speed.
On-Page SEO
!
Title
Active Calculus | Free resources for students; free and open-source materials for instructors.
Title too long. Reduce to 30-60 characters to avoid truncation.
!
Meta Description
empty Lenght:5
Meta description too short. Expand to 100-160 characters.
✓
H1 Heading
1 found - "Active Calculus"
Good - single H1 heading found.
!
Word Count
441
Content somewhat short. Expand to 500+ words for optimal SEO.
!
Canonical Tag
Add canonical tag to prevent duplicate content issues.
✓
Duplicate Meta
[]
No duplicate meta tags found.
✓
Keywords
empty
Meta keywords set (note: not used by major search engines).
Content and UX
✓
Language
en-us
Language attribute properly set.
!
Images
13 total, 10 missing ALT
Add ALT text to images for accessibility and SEO.
✓
Viewport
width=device-width, minimum-scale=1.0,
maximum-scale=1.0
Viewport meta tag properly set for mobile devices.
!
Open Graph
Missing: og:title, og:description, og:image, og:url
Add missing OpenGraph tags for social media sharing: og:title, og:description, og:image, og:url
!
Structured Data
0 JSON-LD scripts
Add structured data (JSON-LD) for rich snippets and better SEO.
Positions in Google
Search Phrases - Google
| Position | Phrase | Page | Snippet |
|---|---|---|---|
| 3 | /multi/s-9-5-lines-p... |