subtraction.com - Subtraction.com + Khoi Vinh’s Web site

Quick Summary

Online Status

Online

Server IP address resolved: Yes
Http response code: 200
Response time: 0.36 sec.
Last Checked: 06/28/2024

Over the time subtraction.com has been ranked as high as 28,971 in the world, while most of its traffic comes from United States, where it reached as high as 170,754 position.

Subtraction.com receives about 1,441 unique visitors and 1,729 pageviews per day. The estimated value of subtraction.com is 32,850 USD. Each unique visitor makes about 1.2 pageviews on average.

Subtraction.com is registered under .COM top-level domain. Check other websites in .COM zone.

At the time of the last check (April 28, 2021) subtraction.com has an expired wildcard SSL certificate issued by DigiCert Inc (expired on June 06, 2021). Check other websites using SSL certificates issued by DigiCert Inc.

According to Google Safe Browsing, Google Safe Search, Symantec and Web of Trust subtraction.com is quite a safe domain.

Mobile-Friendly test indicates that subtraction.com is well optimized for mobile and tablet devices, however website page loading time could be improved.

Subtraction.com General Information

Global Rank

398,415

Average Load Time

0.88sec

Links In Count

853

Website Value

$32,850

Audience Geography. Where are subtraction.com visitors located?

Country	Rank
Australia AU	69383
Canada CA	166906
United States US	170754
India IN	181400
Turkey TR	203125

Country	Percent of Pageviews
United States US	40.5%
Australia AU	9.8%
India IN	7.5%
Canada CA	3%
Turkey TR	1.2%
Other	38.1%

Country	Percent of Visitors
United States US	34.2%
India IN	9.2%
Australia AU	5.9%
Canada CA	4%
Turkey TR	1.6%
Other	45%

Where do visitors go on subtraction.com?

Subdomain	Pageviews
subtraction.com	94.66%
other	5.35%

Subdomain	Pageviews per User
subtraction.com	1.3

Subdomain	Reach
subtraction.com	100%

How popular is subtraction.com?

Days	Reach Rank	Reach Rank Delta	Reach per Million	Reach per Million Delta
90	333985	-6460	15	2%
30	310943	-122846	17	50%
7	357362	149365	15	-48.459%
1	282615	-539304	2	200%

Days	Pageviews Rank	Pageviews Rank Delta	Pageviews per Million	Pageviews per Million Delta	Pageviews per User	Pageviews per User Delta
90	622730	-15713	5	4%	1.2	2%
30	550104	-301894	6	80%	1.3	20%
7	445056	-26829	8	9%	2	100%
1	227286	-826062	2	800%	4	300%

Period	Global Rank	Global Rank Delta
past 3 months	398415	-9200
past month	360301	-170045
past week	362939	98536
yesterday	237675	-670586

Subtraction.com Alexa Rank History

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

Subtraction.com Safety Information

Overview

Last Updated: 11/04/2024

Overall result - "subtraction.com" 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: 03/26/2024

subtraction.com is safe.

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

Google Safe Search

Last Updated: 11/17/2016

subtraction.com 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

Malware not found at "subtraction.com".
"subtraction.com" is not a phishing page.
"subtraction.com" does not install unwanted software.
"subtraction.com" does not contain harmfull applications.
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: 02/26/2021

subtraction.com is safe.

McAfee assesses subtraction.com 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 subtraction.com for mature or inappropriate content, only security checks are evaluated.

Web of Trust

Last Updated: 01/10/2019

subtraction.com child safety isvery good.

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

SSL Information

SSL Checker Tool

Domain	*.subtraction.com
Issuer Organization	DigiCert Inc
Issuer	RapidSSL RSA CA 2018
Algorithm	RSA-SHA256
Valid form	06/05/2020
Expiration	06/06/2021
Signed	Certificate is not self signed
Additional Domains	*.subtraction.com subtraction.com

Subtraction.com Server Information

Server Location

Geolocation Tool

Not Found

ASN Information

ASN Lookup Tool

ASN ID: 209242
ASN Title: CLOUDFLARESPECTRUM Cloudflare, Inc., GB

Last Update: 07/19/2024

ASN Whois

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2020, American Registry for Internet Numbers, Ltd.
#

No match found for a 209242.

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/resources/registry/whois/tou/
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/registry/whois/inaccuracy_reporting/
#
# Copyright 1997-2020, American Registry for Internet Numbers, Ltd.
#

Subtraction.com Domain Name Information

WHOIS

WHOIS Lookup Tool

Domain Whois

Domain Name: SUBTRACTION.COM
Registry Domain ID: 4117338_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.namecheap.com
Registrar URL: http://www.namecheap.com
Updated Date: 2023-01-17T21:14:43Z
Creation Date: 1997-02-13T05:00:00Z
Registry Expiry Date: 2028-02-14T05:00:00Z
Registrar: NameCheap, Inc.
Registrar IANA ID: 1068
Registrar Abuse Contact Email: abuse@namecheap.com
Registrar Abuse Contact Phone: +1.6613102107
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Name Server: DNS1.REGISTRAR-SERVERS.COM
Name Server: DNS2.REGISTRAR-SERVERS.COM
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2024-09-19T10:24:03Z

DNS Records

DNS Lookup Tool

Host	A Record	TTL

Host	MX Record	Priority	TTL

Host	NS Record	TTL

Host	TXT Record	TTL

Subtraction.com HTML Validation

HTML Validation Tool

Errors

Attribute “media” not allowed on element “meta” at this point.

Bad value “//fonts.googleapis.com/css?family=Libre+Baskerville:400,700,400italic|Alegreya:400italic,400,700” for attribute “href” on element “link”: Illegal character in query: “|” is not allowed.

Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.

Attribute “href” not allowed on element “button” at this point.

No space between attributes.

Bad value “http://twitter.com/home?status=Why%20Designers%20Don%E2%80%99t%20Want%20to%20Think%20When%20They%20Read: https://www.subtraction.com/2018/08/06/why-designers-dont-want-to-think-when-they-read/” for attribute “href” on element “a”: Illegal character in query: space is not allowed.

Bad value “http://twitter.com/home?status=What%20Is%20This%20Thing%20Called%20Design%3F: https://www.subtraction.com/2018/07/17/what-is-this-thing-called-design/” for attribute “href” on element “a”: Illegal character in query: space is not allowed.

Stray end tag “h3”.

Bad value “http://twitter.com/home?status=Movies%20Watched%2C%20June%202018: https://www.subtraction.com/2018/07/08/movies-watched-june-2018/” for attribute “href” on element “a”: Illegal character in query: space is not allowed.

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

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

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

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

Bad value “http://twitter.com/home?status=Movies%20Watched%2C%20May%202018: https://www.subtraction.com/2018/06/14/movies-watched-may-2018/” for attribute “href” on element “a”: Illegal character in query: space is not allowed.

Attribute “allow” not allowed on element “iframe” at this point.

Bad value “http://twitter.com/home?status=Automating%20the%20End%20of%20Movies%20on%20Physical%20Discs: https://www.subtraction.com/2018/06/07/automating-the-end-of-movies-on-physical-discs/” for attribute “href” on element “a”: Illegal character in query: space is not allowed.

Duplicate ID “mc4wp_email”.

Bad value “http://twitter.com/home?status=LEGO%20and%20Augmented%20Reality: https://www.subtraction.com/2018/06/06/lego-and-augmented-reality/” for attribute “href” on element “a”: Illegal character in query: space is not allowed.

Bad value “http://twitter.com/home?status=Update%3A%20Recycling%20Isn%E2%80%99t%20Working: https://www.subtraction.com/2018/05/31/update-recycling-isnt-working/” for attribute “href” on element “a”: Illegal character in query: space is not allowed.

Bad value “http://twitter.com/home?status=Illustration%20in%20the%20App%20Store: https://www.subtraction.com/2018/05/22/illustration-in-the-app-store/” for attribute “href” on element “a”: Illegal character in query: space is not allowed.

Bad value “http://twitter.com/home?status=Valuable%20Lessons%20from%20Pointless%20Machines: https://www.subtraction.com/2018/05/16/valuable-lessons-from-pointless-machines/” for attribute “href” on element “a”: Illegal character in query: space is not allowed.

Warnings

Consider avoiding viewport values that prevent users from resizing documents.

Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.

The “navigation” role is unnecessary for element “nav”.

Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).

The first occurrence of ID “mc4wp_email” was here.

The “contentinfo” role is unnecessary for element “footer”.

Subtraction.com Desktop Insights

Desktop Page Insights Tool

Last tested: 12/13/2016

Desktop

Desktop Speed

49%

Optimize images

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

Avoid landing page redirects

Leverage browser caching

Minify JavaScript

Desktop Resource Breakdown

Total Resources	76
Number of Hosts	14
Static Resources	50
JavaScript Resources	17
CSS Resources	5

Subtraction.com Mobile Insights

Mobile Page Insights Tool

Last tested: 12/13/2016

Mobile

Mobile Usability

98%

Size tap targets appropriately

Mobile Speed

40%

Optimize images

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

Avoid landing page redirects

Leverage browser caching

Minify JavaScript

Mobile Resource Breakdown

Total Resources	77
Number of Hosts	14
Static Resources	51
JavaScript Resources	17
CSS Resources	5

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Subtraction.com Subtraction.com + Khoi Vinh’s Web site

Khoi Vinh’s Web site

Quick Summary

Subtraction.com General Information

Subtraction.com Alexa Rank History

Subtraction.com Safety Information

Subtraction.com Server Information

Subtraction.com Domain Name Information

Subtraction.com HTML Validation

Subtraction.com Desktop Insights

Subtraction.com Mobile Insights

Subtraction.com Nearest Competitors

Subtraction.com Typos