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

Khoi Vinh’s Web site

Subtraction.com Overview

Subtraction.com is a website created and managed by Khoi Vinh, a renowned designer, writer, and speaker. The website revolves around design, technology, and creativity, with a special focus on the role of design in today's world. At first glance, it has a clean and professional look, with a simple black and white color scheme that makes it easy to read and navigate.

Subtraction.com receives 1441 unique users per day, which is moderately good traffic for a website with such a specific focus. On average, users visit 1.2 pages per session, which indicates that visitors find the content engaging enough to stay on the site for more than a single page. The site's estimated value is 32850 US dollars, which is a fair amount considering its traffic and topic.

The website is hosted by Cloudflare, Inc., GB hosting, which is known for providing fast loading speeds and reliable uptime. Cloudflare's Spectrum technology also ensures that the site is protected against DDoS attacks, which makes it a safe and secure place for users to visit. The site's SSL certificate is issued by DigiCert Inc, which assures users that their data is encrypted and safe from hackers.

Regarding its family-friendliness, Subtraction.com is appropriate for people of all ages and contains no explicit content that parents may find inappropriate for children. The site's focus on design, creativity, and technology makes it a valuable resource for students, educators, and professionals in these fields.

When tested on Google's PageSpeed Insights, Subtraction.com scored a 40, which is below average and indicates that there may be room for improvement in terms of loading speed. However, the site's simple and minimalist design helps to decrease page load times, making it a user-friendly experience overall.

In summary, Subtraction.com is a website that caters to the interests of designers, creatives, and tech-savvy individuals who value beautiful aesthetics and functional design. It has good traffic and is securely hosted by Cloudflare, which provides protection against service disruptions and cyber attacks. Additionally, the site's clean design makes it easy to read and navigate, making it a valuable resource for anyone interested in design and creative fields.

Subtraction.com Rank Summary

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

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

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?

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

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%

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%

Subtraction.com Website Safety

Overview

Last Updated: 11/13/2024

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

subtraction.com 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: 02/26/2021

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 is very 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 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 Hosting Information

Server Location

Geolocation Tool

ASN Information

ASN Lookup Tool

ASN ID: 209242

ASN Title: CLOUDFLARESPECTRUM Cloudflare, Inc., GB

Last Update: 07/19/2024

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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/
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Subtraction.com Domain Registration and Settings

WHOIS

WHOIS Lookup Tool

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 Check

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 Performance

Last tested: 12/13/2016

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

Last tested: 12/13/2016

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

Subtraction.com Overview

Subtraction.com Rank Summary

Subtraction.com Website Safety

Subtraction.com Rank History

Subtraction.com Hosting Information

Subtraction.com Domain Registration and Settings

Subtraction.com HTML Check

Subtraction.com Desktop Performance

Subtraction.com Mobile Insights

Subtraction.com Similar Audits

Subtraction.com Common Typos