Calculus.org CALCULUS.ORG

Calculus.org Overview

Calculus.org ranking shows that the page is at position 1,782,221 over the world.

Calculus.org hosting company servers are placed in the United States, but, unfortunately, it’s not possible to identify the countries where the bulk of calculus.org users come from and, therefore, we couldn’t define if the distance can influence the webpage load time. See the list of other webpages hosted on UCDAVIS-CORE - University of California at Davis, US servers.

In terms of rank-to-traffic ratio, calculus.org has 415 unique users per day, viewing 418 pages. The rank based value of calculus.org is 3,154 USD. Every user makes 1.08 pageviews on average.

Calculus.org boasts a link base consisting of 268 referring domains and 327 external backlinks, as revealed by the data obtained from web network scanning.

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

According the last verification test in July 15, 2024, calculus.org has an expired SSL certificate issued by Let's Encrypt (expired on September 25, 2024). Click button “Update” SSL Information at the Safety Information section. Check the list of websites using SSL by Let's Encrypt.

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

According the Mobile-Friendly test by Google calculus.org is nice optimized for mobile devices and tablets.

Calculus.org Rank Summary

Global Rank

1,782,221

Average Load Time

0.60sec

Links In Count

194

Website Value

$2,920

Audience Geography. Where are calculus.org visitors located?

Country	Visitors

Country	Pageviews

Country	Rank

Where do visitors go on calculus.org?

Subdomain	Pageviews

Subdomain	Pageviews per User

Subdomain	Reach

How popular is calculus.org?

Period	Global Rank	Global Rank Delta
past 3 months	1782221	-634807
past month	3905415	2868155
past week	3187709	991875
yesterday	1636259	0

Days	Pageviews Rank	Pageviews Rank Delta	Pageviews per Million	Pageviews per Million Delta	Pageviews per User	Pageviews per User Delta
90	2675594	-847232	1	50%	1	0%
30	5029714	3413864	0	-84.39%	1	0%
7	3555517	807087	0	-39.24%	1	0%
1	1750635	0	1	0%	1	0%

Days	Reach Rank	Reach Rank Delta	Reach per Million	Reach per Million Delta
90	1453111	-544893	2	50%
30	3345646	2514791	8	-84.39%
7	2789789	934587	1	-39.24%
1	1562842	0	2	0%

Calculus.org Website Safety

Overview

Last Updated: 11/11/2024

Overall result - calculus.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: 03/27/2024

calculus.org is safe.

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

Google Safe Search

Last Updated: 07/11/2017

calculus.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

calculus.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: 02/20/2021

calculus.org is safe.

McAfee assesses calculus.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 calculus.org for mature or inappropriate content, only security checks are evaluated.

Web of Trust

Last Updated: 01/12/2019

calculus.org child safety is very good.

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

SSL Information

SSL Checker Tool

Domain	ddays2024.ucdavis.edu
Issuer Organization	Let's Encrypt
Issuer	R11
Algorithm	RSA-SHA256
Valid form	06/27/2024
Expiration	09/25/2024
Signed	Certificate is not self signed
Additional Domains	ddays2024.math.ucdavis.edu ddays2024.ucdavis.edu

Calculus.org Rank History

Alexa Rank shows how popular calculus.org is in comparison with other sites. The most popular site has Alexa Rank equals 1. If calculus.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 calculus.org and pageviews on calculus.org over the past 3 months.

Calculus.org Hosting Information

Server Location

Geolocation Tool

ASN Information

ASN Lookup Tool

ASN ID: 6192

ASN Title: UCDAVIS-CORE - University of California at Davis, US

Last Update: 11/09/2024

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/whois_tou.html
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/whois_reporting/index.html
#
# Copyright 1997-2018, American Registry for Internet Numbers, Ltd.
#

ASNumber: 6192
ASName: UCDAVIS-CORE
ASHandle: AS6192
RegDate:
Updated: 2014-10-14
Ref: https://rdap.arin.net/registry/autnum/6192

OrgName: University of California at Davis
OrgId: UCAD
Address: NETWORK OPERATIONS CENTER
Address: 1 SHIELDS AVE
City: DAVIS
StateProv: CA
PostalCode: 95616-5270
Country: US
RegDate:
Updated: 2014-10-13
Ref: https://rdap.arin.net/registry/entity/UCAD

OrgNOCHandle: UCD-ARIN
OrgNOCName: U C Davis
OrgNOCPhone: +1-530-752-7656
OrgNOCEmail: network@ucdavis.edu
OrgNOCRef: https://rdap.arin.net/registry/entity/UCD-ARIN

OrgTechHandle: UCD-ARIN
OrgTechName: U C Davis
OrgTechPhone: +1-530-752-7656
OrgTechEmail: network@ucdavis.edu
OrgTechRef: https://rdap.arin.net/registry/entity/UCD-ARIN

OrgAbuseHandle: UCDA-ARIN
OrgAbuseName: U C Davis Abuse
OrgAbusePhone: +1-530-754-4357
OrgAbuseEmail: abuse@ucdavis.edu
OrgAbuseRef: https://rdap.arin.net/registry/entity/UCDA-ARIN

RTechHandle: UCD-ARIN
RTechName: U C Davis
RTechPhone: +1-530-752-7656
RTechEmail: network@ucdavis.edu
RTechRef: https://rdap.arin.net/registry/entity/UCD-ARIN

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/whois_tou.html
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/whois_reporting/index.html
#
# Copyright 1997-2018, American Registry for Internet Numbers, Ltd.
#

Calculus.org Domain Registration and Settings

WHOIS

WHOIS Lookup Tool

Domain Name: CALCULUS.ORG
Registry Domain ID: D548502-LROR
Registrar WHOIS Server: whois.networksolutions.com
Registrar URL: http://www.networksolutions.com
Updated Date: 2019-08-14T17:01:33Z
Creation Date: 1997-10-14T04:00:00Z
Registry Expiry Date: 2024-10-13T04:00:00Z
Registrar Registration Expiration Date:
Registrar: Network Solutions, LLC
Registrar IANA ID: 2
Registrar Abuse Contact Email: domain.operations@web.com
Registrar Abuse Contact Phone: +1.8777228662
Reseller:
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Registrant Organization:
Registrant State/Province: FL
Registrant Country: US
Name Server: NS1.MATH.UCDAVIS.EDU
Name Server: NS2.MATH.UCDAVIS.EDU
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form https://www.icann.org/wicf/)
>>> Last update of WHOIS database: 2022-01-01T13:42:03Z

DNS Records

DNS Lookup Tool

Host	A Record	TTL
calculus.org	169.237.99.135	86400

Host	MX Record	Priority	TTL
calculus.org	mx1.math.ucdavis.edu	5	86400

Host	NS Record	TTL
calculus.org	ns1.math.ucdavis.edu	86400
calculus.org	ns2.math.ucdavis.edu	86400

Host	TXT Record	TTL
calculus.org	v=spf1 mx a:mail.math.ucdavis.edu a:slope.math.ucdavis.edu a:step.math.ucdavis.edu include:servers.mcsv.net ~all	86400

ns1.math.ucdavis.edu
TTL: 86400
Email address: hostmaster.math.ucdavis.edu
Serial: 2023070803
Refresh: 21600
Retry: 1800
Expire: 1814400
Minimum: 3600

Calculus.org HTML Check

HTML Validation Tool

Errors

The character encoding was not declared. Proceeding using “windows-1252”.

Start tag seen without seeing a doctype first. Expected “<!DOCTYPE html>”.

Element “head” is missing a required instance of child element “title”.

The “bgcolor” attribute on the “body” element is obsolete. Use CSS instead.

Element “title” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)

Stray end tag “head”.

Start tag “body” seen but an element of the same type was already open.

The “center” 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.

Stray end tag “b”.

Stray end tag “ul”.

Bad value “mailto: calculus@math.ucdavis.edu” for attribute “href” on element “a”: Illegal character in scheme data: space is not allowed.

Stray end tag “font”.

Warnings

The “type” attribute is unnecessary for JavaScript resources.

The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.

Consider adding a “lang” attribute to the “html” start tag to declare the language of this document.

Calculus.org Desktop Performance

Last tested: 10/10/2019

Desktop Speed

99%

Leverage browser caching

Optimize images

Desktop Resource Breakdown

Total Resources	2
Number of Hosts	1
Static Resources	1

Calculus.org Mobile Insights

Last tested: 11/06/2019

Mobile Usability

61%

Use legible font sizes

Size tap targets appropriately

Configure the viewport

Mobile Speed

98%

Leverage browser caching

Optimize images

Mobile Resource Breakdown

Total Resources	2
Number of Hosts	1
Static Resources	1

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Calculus.org CALCULUS.ORG

Calculus.org Overview

Calculus.org Rank Summary

Calculus.org Website Safety

Calculus.org Rank History

Calculus.org Hosting Information

Calculus.org Domain Registration and Settings

Calculus.org HTML Check

Calculus.org Desktop Performance

Calculus.org Mobile Insights

Calculus.org Similar Audits

Calculus.org Common Typos