Cdio.org Worldwide CDIO Initiative

Cdio.org Overview

Cdio.org ranking shows that the page is at position 1,383,224 over the world, while the bulk of its audience is from India, where it ranks 272,662.

In terms of rank-to-traffic ratio, cdio.org has 534 unique users per day, viewing 539 pages. The rank based value of cdio.org is 6,314 USD. Every user makes 1.07 pageviews on average.

Cdio.org boasts a link base consisting of 375 referring domains and 427 external backlinks, as revealed by the data obtained from web network scanning.

Cdio.org top-level domain belongs to .ORG domain zone. Check other webpages in .ORG zone.

According the last verification test in January 14, 2025, cdio.org has an invalid SSL certificate. Click button “Update” SSL Information at the Safety Information section.

Based on data from Google Safe Browsing, Google Safe Search, Symantec and Web of Trust cdio.org is a fairly safe domain.

According the Mobile-Friendly test by Google cdio.org is nice optimized for mobile devices and tablets, however the webpage speed could be improved.

Cdio.org Rank Summary

Global Rank

1,383,224

Average Load Time

0.00sec

Links In Count

160

Website Value

$5,846

Audience Geography. Where are cdio.org visitors located?

Country	Visitors
India IN	51.2%
Other	48.8%

Country	Pageviews
India IN	42.9%
Other	57.1%

Country	Rank
India IN	272662

Where do visitors go on cdio.org?

Subdomain	Pageviews
cdio.org	92.86%
other	7.14%

Subdomain	Pageviews per User
cdio.org	1

Subdomain	Reach
cdio.org	91.46%

How popular is cdio.org?

Period	Global Rank	Global Rank Delta
past 3 months	1383224	-48176
past month	2004973	-726555
past week	1714079	-1640861

Days	Pageviews Rank	Pageviews Rank Delta	Pageviews per Million	Pageviews per Million Delta	Pageviews per User	Pageviews per User Delta
90	1801422	75196	1	-4.865%	1	-17.42%
30	2678168	-766573	1	60%	1	-7.752%
7	2219001	-1479525	1	200%	1	5%

Days	Reach Rank	Reach Rank Delta	Reach per Million	Reach per Million Delta
90	1265833	-106269	3	20%
30	1754934	-749499	19	70%
7	1469991	-1664755	3	100%

Cdio.org Website Safety

Overview

Last Updated: 01/14/2025

Overall result - cdio.org is safe.

We gather website safety and reputation data and compare it with available third-party sources so we calculate own safety and trustworthiness rate based on information that we get.

Norton Connect Safe

Last Updated: 02/15/2024

cdio.org is safe.

Norton ConnectSafe evaluates cdio.org for any unsafe and insecure content. The results are critical for families with young children.

Google Safe Search

Last Updated: 08/27/2017

cdio.org is safe.

SafeSearch is used as a parental control tool to filter out any inappropriate for your children search results on your devices: phones, tablets or personal computers.

Google Safe Browsing

Last Updated: 01/09/2019

cdio.org is safe.
Malware: not found.
Phishing: not detected.
Unwanted software: not found.
Harmfull applications: not found.

Google Safe Browsing notifies when websites are compromised by malicious actors. These protections work across Google products and provide a safer online experience.

Site Advisor

Last Updated: 03/10/2021

cdio.org is safe.

McAfee assesses cdio.org for a meaningful set of security threats. Featured dangers from annoying pop-ups to hidden Trojans, that can steal your identity, will be revealed. McAfee does not analyze cdio.org for mature or inappropriate content, only security checks are evaluated.

Web of Trust

Last Updated: 01/13/2019

cdio.org child safety is good.

The WOT calculates reputation of the cdio.org. This reputation system receives ratings from users and information from third-party sources, assesses the cdio.org for safety features and confirms, whether cdio.org is suitable for children.

SSL Information

SSL Checker Tool

WARNING!	Certificate download error. Previous scan results are shown below.
Domain	Unknown
Issuer Organization	Unknown
Issuer	Unknown
Algorithm	Unknown
Valid form	Unknown
Expiration	Unknown
Signed	No information
Additional Domains

Cdio.org Rank History

Alexa Rank shows how popular cdio.org is in comparison with other sites. The most popular site has Alexa Rank equals 1. If cdio.org has Alexa Rank equals 100,000, then it is in TOP 100,000 popular sites in the world. The rank is calculated using a combination of average daily visitors to cdio.org and pageviews on cdio.org over the past 3 months.

Cdio.org Hosting Information

Server Location

Geolocation Tool

ASN Information

ASN Lookup Tool

ASN ID: 2841

ASN Title: Chalmers University of Technology

Last Update: 01/08/2025

% This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See http://www.ripe.net/db/support/db-terms-conditions.pdf

% Note: this output has been filtered.
% To receive output for a database update, use the "-B" flag.

% Information related to 'AS2830 - AS2879'

as-block: AS2830 - AS2879
descr: RIPE NCC ASN block
remarks: These AS Numbers are assigned to network operators in the RIPE NCC service region.
mnt-by: RIPE-NCC-HM-MNT
created: 2002-04-08T12:43:48Z
last-modified: 2014-02-24T13:15:16Z
source: RIPE

% Information related to 'AS2841'

% Abuse contact for 'AS2841' is 'abuse@chalmers.se'

aut-num: AS2841
as-name: CHALMERS
org: ORG-CUoT1-RIPE
import: from AS1653
action pref=100;
accept ANY
export: to AS1653
announce AS2841
default: to AS1653
action pref=100;
networks ANY
admin-c: CTH2-RIPE
tech-c: CTH2-RIPE
status: ASSIGNED
mnt-by: RIPE-NCC-END-MNT
mnt-by: CHALMERS-MNT
created: 1970-01-01T00:00:00Z
last-modified: 2017-11-15T09:14:02Z
source: RIPE
sponsoring-org: ORG-SA58-RIPE

organisation: ORG-CUoT1-RIPE
org-name: Chalmers University of Technology
org-type: OTHER
address: Chalmersplatsen 4
address: Gothenburg
address: SE-412 96
address: SE
mnt-ref: CHALMERS-MNT
mnt-ref: SUNET-MNT
mnt-by: CHALMERS-MNT
abuse-c: CTH2-RIPE
created: 2004-11-03T16:02:03Z
last-modified: 2017-07-13T12:48:38Z
source: RIPE # Filtered

role: CHALMERS NIC
address: Chalmers University of Technology
address: ITS/Infrastructure
address: SE-412 96 Goteborg
address: SWEDEN
phone: +46 31 772 11 00
fax-no: +46 31 772 86 60
abuse-mailbox: abuse@chalmers.se
admin-c: GB1539-RIPE
admin-c: GL41
tech-c: GL41
tech-c: GB1539-RIPE
tech-c: PA1009-RIPE
tech-c: KR427-RIPE
tech-c: JL10962-RIPE
tech-c: FE2368-RIPE
tech-c: JM18309-RIPE
tech-c: FR8069-RIPE
tech-c: PO2901-RIPE
nic-hdl: CTH2-RIPE
mnt-by: CHALMERS-MNT
created: 1970-01-01T00:00:00Z
last-modified: 2017-02-20T17:13:28Z
source: RIPE # Filtered

% This query was served by the RIPE Database Query Service version 1.91.2 (ANGUS)

Cdio.org Domain Registration and Settings

WHOIS

WHOIS Lookup Tool

Domain Name: cdio.org
Registry Domain ID: 4eaca8958efd4db79db13ccb0d3b27b2-LROR
Registrar WHOIS Server: http://whois.ascio.com
Registrar URL: http://www.ascio.com
Updated Date: 2023-06-06T11:36:21Z
Creation Date: 2001-07-06T19:21:40Z
Registry Expiry Date: 2024-07-06T19:21:40Z
Registrar: Ascio Technologies, Inc. Danmark - Filial af Ascio technologies, Inc. USA
Registrar IANA ID: 106
Registrar Abuse Contact Email: abuse@ascio.com
Registrar Abuse Contact Phone: +1.4165350123
Domain Status: ok https://icann.org/epp#ok
Registry Registrant ID: REDACTED FOR PRIVACY
Registrant Name: REDACTED FOR PRIVACY
Registrant Organization: Chalmers Tekniska Hogskola AB
Registrant Street: REDACTED FOR PRIVACY
Registrant City: REDACTED FOR PRIVACY
Registrant State/Province:
Registrant Postal Code: REDACTED FOR PRIVACY
Registrant Country: SE
Registrant Phone: REDACTED FOR PRIVACY
Registrant Phone Ext: REDACTED FOR PRIVACY
Registrant Fax: REDACTED FOR PRIVACY
Registrant Fax Ext: REDACTED FOR PRIVACY
Registrant Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Registry Admin ID: REDACTED FOR PRIVACY
Admin Name: REDACTED FOR PRIVACY
Admin Organization: REDACTED FOR PRIVACY
Admin Street: REDACTED FOR PRIVACY
Admin City: REDACTED FOR PRIVACY
Admin State/Province: REDACTED FOR PRIVACY
Admin Postal Code: REDACTED FOR PRIVACY
Admin Country: REDACTED FOR PRIVACY
Admin Phone: REDACTED FOR PRIVACY
Admin Phone Ext: REDACTED FOR PRIVACY
Admin Fax: REDACTED FOR PRIVACY
Admin Fax Ext: REDACTED FOR PRIVACY
Admin Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Registry Tech ID: REDACTED FOR PRIVACY
Tech Name: REDACTED FOR PRIVACY
Tech Organization: REDACTED FOR PRIVACY
Tech Street: REDACTED FOR PRIVACY
Tech City: REDACTED FOR PRIVACY
Tech State/Province: REDACTED FOR PRIVACY
Tech Postal Code: REDACTED FOR PRIVACY
Tech Country: REDACTED FOR PRIVACY
Tech Phone: REDACTED FOR PRIVACY
Tech Phone Ext: REDACTED FOR PRIVACY
Tech Fax: REDACTED FOR PRIVACY
Tech Fax Ext: REDACTED FOR PRIVACY
Tech Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Name Server: ns1.chalmers.se
Name Server: ns2.chalmers.se
Name Server: ns3.chalmers.se
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of WHOIS database: 2023-10-31T21:05:04Z

DNS Records

DNS Lookup Tool

Host	A Record	TTL

Host	MX Record	Priority	TTL

Host	NS Record	TTL

Host	TXT Record	TTL

Cdio.org HTML Check

HTML Validation Tool

Errors

Legacy doctype. Expected “<!DOCTYPE html>”.

When the attribute “xml:lang” in no namespace is specified, the element must also have the attribute “lang” present with the same value.

The “version” attribute on the “html” element is obsolete. You can safely omit it.

The “profile” attribute on the “head” element is obsolete. To declare which “meta” terms are used in the document, instead register the names as meta extensions. To trigger specific UA behaviors, use a “link” element instead.

A document must not include more than one “meta” element with a “http-equiv” attribute whose value is “content-type”.

Bad value for attribute “href” on element “link”: Illegal character in query: “|” is not allowed.

CSS: “background”: Lexical error at line 143, column 19. Encountered: ";" (59), after : "#".

CSS: “background”: Parse Error.

Bad value “tooltip” for attribute “rel” on element “a”: The string “tooltip” is not a registered keyword.

Attribute “border” not allowed on element “input” at this point.

Attribute “a” not allowed on element “input” at this point.

Element “input” is missing required attribute “alt”.

Duplicate ID “nav”.

The “center” element is obsolete. Use CSS instead.

Bad value “100%” for attribute “width” on element “iframe”: Expected a digit but saw “%” instead.

Bad value “320px” for attribute “height” on element “iframe”: Expected a digit but saw “p” instead.

The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.

An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.

Warnings

The “type” attribute for the “style” element is not needed and should be omitted.

The “type” attribute is unnecessary for JavaScript resources.

The first occurrence of ID “nav” was here.

This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.

Cdio.org Desktop Performance

Last tested: 04/18/2018

Desktop Speed

61%

Enable compression

Optimize images

Eliminate render-blocking JavaScript and CSS in above-the-fold content

Minify CSS

Leverage browser caching

Minify JavaScript

Reduce server response time

Minify HTML

Desktop Resource Breakdown

Total Resources	123
Number of Hosts	15
Static Resources	100
JavaScript Resources	31
CSS Resources	31

Cdio.org Mobile Insights

Last tested: 12/01/2017

Mobile Usability

99%

Size tap targets appropriately

Mobile Speed

52%

Eliminate render-blocking JavaScript and CSS in above-the-fold content

Enable compression

Optimize images

Minify CSS

Leverage browser caching

Minify JavaScript

Minify HTML

Mobile Resource Breakdown

Total Resources	126
Number of Hosts	17
Static Resources	102
JavaScript Resources	33
CSS Resources	31

Cdio.org Common Typos

www.cdio.com
www.cdio.net
www.cdio.org
www.cdio.info
www.cdio.biz
www.cdio.us
www.cdio.mobi
www.dio.org
www.cdio.org
www.xdio.org
www.cxdio.org
www.xcdio.org
www.ddio.org
www.cddio.org
www.dcdio.org
www.fdio.org
www.cfdio.org
www.fcdio.org
www.vdio.org
www.cvdio.org
www.vcdio.org
www.cio.org
www.cxio.org
www.cdxio.org
www.csio.org
www.cdsio.org
www.csdio.org
www.ceio.org
www.cdeio.org
www.cedio.org
www.crio.org
www.cdrio.org
www.crdio.org
www.cfio.org
www.cdfio.org
www.ccio.org
www.cdcio.org
www.ccdio.org
www.cdo.org
www.cduo.org
www.cdiuo.org
www.cduio.org
www.cdjo.org
www.cdijo.org
www.cdjio.org
www.cdko.org
www.cdiko.org
www.cdkio.org
www.cdoo.org
www.cdioo.org
www.cdoio.org
www.cdi.org
www.cdii.org
www.cdioi.org
www.cdiio.org
www.cdik.org
www.cdiok.org
www.cdil.org
www.cdiol.org
www.cdilo.org
www.cdip.org
www.cdiop.org
www.cdipo.org

Cdio.org Worldwide CDIO Initiative

Cdio.org Overview

Cdio.org Rank Summary

Cdio.org Website Safety

Cdio.org Rank History

Cdio.org Hosting Information

Cdio.org Domain Registration and Settings

Cdio.org HTML Check

Cdio.org Desktop Performance

Cdio.org Mobile Insights

Cdio.org Similar Audits

Cdio.org Common Typos