rushjs.io Rushjs.io

   
Rush

Domain Summary

What is the traffic rank for Rushjs.io?

• Rushjs.io ranks #1,825,036 globally on HypeStat.

What percent of global Internet users visit Rushjs.io?

9.4E-6% of global Internet users visit Rushjs.io

How many people visit Rushjs.io each day?

• Rushjs.io receives approximately 461 visitors and 836 page impressions per day.

Which countries does Rushjs.io receive most of its visitors from?

• Rushjs.io is mostly visited by people located in Russian Federation,United States,India.

How much Rushjs.io can earn?

• Rushjs.io should earn about $2.32/day from advertising revenue.

What is Rushjs.io estimated value?

• Estimated value of Rushjs.io is $2,275.95.

What IP addresses does Rushjs.io resolve to?

• Rushjs.io resolves to the IP addresses 185.199.108.153.

Where are Rushjs.io servers located in?

• Rushjs.io has servers located in California, United States.

rushjs.io Profile

What technologies does rushjs.io use?

These are the technologies used at rushjs.io. rushjs.io has a total of 7 technologies installed in 7 different categories.

rushjs.io Traffic Analysis

Rushjs.io is ranked #1,825,036 in the world. This website is viewed by an estimated 461 visitors daily, generating a total of 836 pageviews. This equates to about 14K monthly visitors. Rushjs.io traffic has increased by 71.4% compared to last month.
Daily Visitors461
83.73%
Monthly Visits14K
71.4%
Pages per Visit1.81
266.55%
Visit duration00:17
371.29%
Bounce Rate45.59%
5.2%
Is this your site?Verify your site's metrics.
Daily Unique Visitors:
461
Monthly Visits:
13,968
Pages per Visit:
1.81
Daily Pageviews:
836
Avg. visit duration:
00:17
Bounce rate:
45.59%
Global Reach:
9.4E-6%
Monthly Visits (SEMrush):
9,936
Monthly Unique Visitors (SEMrush):
8,468
Monthly Visits (SimilarWeb):
13,697
HypeRank:
1,825,036
SEMrush Rank:
1,564,692
SimilarWeb Rank:
1,825,036
*All traffic values are estimates only.

Traffic sources

Direct:
62.28%
Referral:
5.48%
Search:
28.04%
Social:
3.71%
Paid:
0.49%

Desktop vs Mobile

Desktop:
67.71%
Mobile:
32.29%

Total Visits Last 3 Months

13.8K
JAN
8.1K
FEB
14K
MAR

Visitors by country

Country
Users%
 
Russian Federation 22.53%
 
United States 18.28%
 
India 9.24%
 
Singapore 5.99%
 
Germany 5.30%

Which sites are competitors to rushjs.io?

Websites similar to rushjs.io are sites similar on user interests and browsing behavior. Users can discover new websites that are similar to the ones they already enjoy or find useful.
Last update was 39 days ago
     
This can take up to 60 seconds. Please wait...

*HypeStat.com is not promoting or affiliated with rushjs.io in any way. Only publicly available statistics data are displayed.

 

SEMrush is a complete on line advertising and marketing platform that gives a extensive variety of gear and functions to help companies and entrepreneurs in enhancing their on line visibility and optimizing their virtual advertising and marketing strategies.
SemRushSemRush
Domain:
  rushjs.io
Rank:
(Rank based on keywords, cost and organic traffic)
  1,564,692
Organic Keywords:
(Number of keywords in top 20 Google SERP)
  318
Organic Traffic:
(Number of visitors coming from top 20 search results)
  526
Organic Cost:
((How much need to spend if get same number of visitors from Google Adwords)
  $218.00

Revenue report

Google.com would generate approximately $2.3 per day if the source of income were advertisements, which equates to an estimated monthly revenue of $69.6 and annual gross revenue of approximately $846.8. Based on these figures, the site's net worth is estimated at around $2.3K.

How much would rushjs.io make?

Daily Revenue:
$2.32
Monthly Revenue:
$69.60
Yearly Revenue:
$846.80
*All earnings values are estimates only.

Daily earning by country

 
CountryPageviewsEarning
 
United States 153$0.74
 
Singapore 50$0.09
 
Russian Federation 188$0.08
 
Germany 44$0.06
 
India 77$0.03

Loss of money due to Adblock?

Daily Revenue Loss:
$0.19
Monthly Revenue Loss:
$5.73
Yearly Revenue Loss:
$69.71
Daily Pageviews Blocked:
88
Monthly Pageviews Blocked:
2,634
Yearly Pageviews Blocked:
32,048

Daily revenue loss by country

 
CountryBlockedLost Money
 
United States 28$0.13
 
Singapore 15$0.03
 
Germany 13$0.02
 
India 22$0.01
 
Russian Federation 11$0.00

How much is rushjs.io worth?

Website Value:
$2.3K

Ad Experience Report

Summary of the ad experience rating of a website for a specific platform.

Mobile summary

Root domain:
rushjs.io
Ad filtering:
(Chrome is not filtering ads on your site.)
Off
Status:
(The status of the site that is reviewed for the Better Ads Standards.)
Not reviewed

Desktop summary

Root domain:
rushjs.io
Ad filtering:
(Chrome is not filtering ads on your site.)
Off
Status:
(The status of the site that is reviewed for the Better Ads Standards.)
Not reviewed

Abusive Experience Report

Summary of the abusive experience rating of a website.
Root domain:
rushjs.io
Enforcement:
(Chrome is not preventing your site from opening new windows or tabs.)
Off
Status:
(The status of the site reviewed for the abusive experiences.)
Not reviewed

Where is rushjs.io hosted?

Rushjs.io may be hosted in multiple data centers distributed in different locations around the world. This is probably just one of them.
Server IP:
185.199.108.153
ASN:
AS54113 
ISP:
Fastly 
Server Location:
California, CA
United States, US
 

Other sites hosted on 185.199.108.153

How fast does rushjs.io load?

The average loading time of rushjs.io is 48 ms. The Desktop speed index is 99 and mobile speed index is 81.
Average Load Time:
48 ms

Page Speed (Google PageSpeed Insights) - Desktop

99
0-49 50-89 90-100 i

Field Data

Over the last 30 days, the field data shows that this page has a FAST speed compared to other pages in the Chrome User Experience Report.We are showing the 90th percentile of FCP and the 95th percentile of FID.

Cumulative Layout Shift (CLS)1ms 99% of loads for this page have a fast (<0.01s) Cumulative Layout Shift (CLS) 99% 0% of loads for this page have an average (0.01s ~ 0.025s) Cumulative Layout Shift (CLS) 0% 0% of loads for this page have a slow (>0.025s) Cumulative Layout Shift (CLS) 0%
Time To First Byte (TTFB)583ms 84% of loads for this page have a fast (<0.8s) Time To First Byte (TTFB) 84% 14% of loads for this page have an average (0.8s ~ 1.8s) Time To First Byte (TTFB) 14% 1% of loads for this page have a slow (>1.8s) Time To First Byte (TTFB) 1%
First Contentful Paint (FCP)982ms 94% of loads for this page have a fast (<1.8s) First Contentful Paint (FCP) 94% 3% of loads for this page have an average (1.8s ~ 3s) First Contentful Paint (FCP) 3% 1% of loads for this page have a slow (>3s) First Contentful Paint (FCP) 1%
First Input Delay (FID)0 0% of loads for this page have a fast (<0ms) First Input Delay (FID) 0% 0% of loads for this page have an average (0ms ~ 0ms) First Input Delay (FID) 0% 0% of loads for this page have a slow (>0ms) First Input Delay (FID) 0%
Interaction To Next Paint (INP)80ms 94% of loads for this page have a fast (<200ms) Interaction To Next Paint (INP) 94% 4% of loads for this page have an average (200ms ~ 500ms) Interaction To Next Paint (INP) 4% 0% of loads for this page have a slow (>500ms) Interaction To Next Paint (INP) 0%
Largest Contentful Paint (LCP)1.4s 93% of loads for this page have a fast (<2500ms) Largest Contentful Paint (LCP) 93% 4% of loads for this page have an average (2500ms ~ 4000ms) Largest Contentful Paint (LCP) 4% 1% of loads for this page have a slow (>4000ms) Largest Contentful Paint (LCP) 1%

Origin Data

All pages served from this origin have an FAST speed compared to other pages in the Chrome User Experience Report. over the last 30 days.To view suggestions tailored to each page, analyze individual page URLs.

Cumulative Layout Shift (CLS)1ms 96% of loads for this page have a fast (<0.01s) Cumulative Layout Shift (CLS) 96% 2% of loads for this page have an average (0.01s ~ 0.025s) Cumulative Layout Shift (CLS) 2% 0% of loads for this page have a slow (>0.025s) Cumulative Layout Shift (CLS) 0%
Time To First Byte (TTFB)715ms 79% of loads for this page have a fast (<0.8s) Time To First Byte (TTFB) 79% 17% of loads for this page have an average (0.8s ~ 1.8s) Time To First Byte (TTFB) 17% 2% of loads for this page have a slow (>1.8s) Time To First Byte (TTFB) 2%
First Contentful Paint (FCP)1.1s 92% of loads for this page have a fast (<1.8s) First Contentful Paint (FCP) 92% 5% of loads for this page have an average (1.8s ~ 3s) First Contentful Paint (FCP) 5% 2% of loads for this page have a slow (>3s) First Contentful Paint (FCP) 2%
First Input Delay (FID)0 0% of loads for this page have a fast (<0ms) First Input Delay (FID) 0% 0% of loads for this page have an average 0ms ~ 0ms) First Input Delay (FID) 0% 0% of loads for this page have a slow (>0ms) First Input Delay (FID) 0%
Interaction To Next Paint (INP)75ms 96% of loads for this page have a fast (<200ms) Interaction To Next Paint (INP) 96% 3% of loads for this page have an average (200ms ~ 500ms) Interaction To Next Paint (INP) 3% 0% of loads for this page have a slow (>500ms) Interaction To Next Paint (INP) 0%
Largest Contentful Paint (LCP)1.3s 95% of loads for this page have a fast (<2500ms) Largest Contentful Paint (LCP) 95% 2% of loads for this page have an average (2500ms ~ 4000ms) Largest Contentful Paint (LCP) 2% 1% of loads for this page have a slow (>4000ms) Largest Contentful Paint (LCP) 1%

Lab Data

Lazy load third-party resources with facades  
Some third-party embeds can be lazy loaded. Consider replacing them with a facade until they are required. Learn how to defer third-parties with a facade
First Contentful Paint 0.7 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more about the First Contentful Paint metric
Total Blocking Time 0 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more about the Total Blocking Time metric
Legacy JavaScript  
Polyfills and transforms enable legacy browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile features, unless you know you must support legacy browsers. Baseline Learn why most sites can deploy ES6+ code without transpiling
First Meaningful Paint  
First Meaningful Paint measures when the primary content of a page is visible. Learn more about the First Meaningful Paint metric
INP by phase  
Start investigating with the longest phase. To reduce processing duration, , often JS. Delays can be minimized optimize the main-thread costs
Max Potential First Input Delay 20 ms
The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric
Font display  
Consider setting to swap or optional to ensure text is consistently visible. swap can be further optimized to mitigate layout shifts with . font-display font metric overrides
Largest Contentful Paint 0.8 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn more about the Largest Contentful Paint metric
Duplicated JavaScript  
Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.
Speed Index 0.7 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more about the Speed Index metric
Time to Interactive 0.8 s
Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric

Page Speed (Google PageSpeed Insights) - Mobile

81
0-49 50-89 90-100 i

Field Data

Over the last 30 days, the field data shows that this page has a FAST speed compared to other pages in the Chrome User Experience Report.We are showing the 90th percentile of FCP and the 95th percentile of FID.

Cumulative Layout Shift (CLS)0ms 99% of loads for this page have a fast (<0.01s) Cumulative Layout Shift (CLS) 96% 2% of loads for this page have an average (0.01s ~ 0.025s) Cumulative Layout Shift (CLS) 2% 0% of loads for this page have a slow (>0.025s) Cumulative Layout Shift (CLS) 0%
Time To First Byte (TTFB)742ms 84% of loads for this page have a fast (<800s) Time To First Byte (TTFB) 77% 14% of loads for this page have an average (800s ~ 1800s) Time To First Byte (TTFB) 14% 8% of loads for this page have a slow (>1800s) Time To First Byte (TTFB) 8%
First Contentful Paint (FCP)1.5s 94% of loads for this page have a fast (<1.8s) First Contentful Paint (FCP) 82% 7% of loads for this page have an average (1.8s ~ 3s) First Contentful Paint (FCP) 7% 9% of loads for this page have a slow (>3s) First Contentful Paint (FCP) 9%
First Input Delay (FID)0 0% of loads for this page have a fast (<0ms) First Input Delay (FID) 0% 0% of loads for this page have an average (0ms ~ 0ms) First Input Delay (FID) 0% 0% of loads for this page have a slow (>0ms) First Input Delay (FID) 0%
Interactive To Next Paint (INP)0 94% of loads for this page have a fast (<0s) Interactive To Next Paint (INP) 0% 0% of loads for this page have an average (0s ~ 0s) Interactive To Next Paint (INP) 0% 0% of loads for this page have a slow (>0s) Interactive To Next Paint (INP) 0%
Largest Contentful Paint (LCP)1.7s 93% of loads for this page have a fast (<2500s) Largest Contentful Paint (LCP) 86% 10% of loads for this page have an average (2500s ~ 4000s) Largest Contentful Paint (LCP) 10% 2% of loads for this page have a slow (>4000s) Largest Contentful Paint (LCP) 2%

Origin Data

All pages served from this origin have an FAST speed compared to other pages in the Chrome User Experience Report. over the last 30 days.To view suggestions tailored to each page, analyze individual page URLs.

Cumulative Layout Shift (CLS)0ms 96% of loads for this page have a fast (<0.01s) Cumulative Layout Shift (CLS) 96% 2% of loads for this page have an average (0.01s ~ 0.025s) Cumulative Layout Shift (CLS) 2% 0% of loads for this page have a slow (>0.025s) Cumulative Layout Shift (CLS) 0%
Time To First Byte (TTFB)742ms 77% of loads for this page have a fast (<0.8s) Time To First Byte (TTFB) 77% 14% of loads for this page have an average (0.8s ~ 1.8s) Time To First Byte (TTFB) 14% 8% of loads for this page have a slow (>1.8s) Time To First Byte (TTFB) 8%
First Contentful Paint (FCP)1.5s 82% of loads for this page have a fast (<1.8s) First Contentful Paint (FCP) 82% 7% of loads for this page have an average (1.8s ~ 3s) First Contentful Paint (FCP) 7% 9% of loads for this page have a slow (>3s) First Contentful Paint (FCP) 9%
First Input Delay (FID)0 0% of loads for this page have a fast (<0ms) First Input Delay (FID) 0% 0% of loads for this page have an average 0ms ~ 0ms) First Input Delay (FID) 0% 0% of loads for this page have a slow (>0ms) First Input Delay (FID) 0%
Interactive To Next Paint (INP)0 0% of loads for this page have a fast (<0s) Interactive To Next Paint (INP) 0% 0% of loads for this page have an average (0s ~ 0s) Interactive To Next Paint (INP) 0% 0% of loads for this page have a slow (>0s) Interactive To Next Paint (INP) 0%
Largest Contentful Paint (LCP)1.7s 86% of loads for this page have a fast (<2.5s)Largest Contentful Paint (LCP) 86% 10% of loads for this page have an average (2.5s ~ 4s)Largest Contentful Paint (LCP) 10% 2% of loads for this page have a slow (>4s)Largest Contentful Paint (LCP) 2%

Lab Data

Largest Contentful Paint 4.4 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn more about the Largest Contentful Paint metric
First Contentful Paint 2.5 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more about the First Contentful Paint metric
First Meaningful Paint  
First Meaningful Paint measures when the primary content of a page is visible. Learn more about the First Meaningful Paint metric
INP by phase  
Start investigating with the longest phase. To reduce processing duration, , often JS. Delays can be minimized optimize the main-thread costs
Speed Index 2.9 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more about the Speed Index metric
Time to Interactive 4.4 s
Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric
Max Potential First Input Delay 130 ms
The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric
Lazy load third-party resources with facades  
Some third-party embeds can be lazy loaded. Consider replacing them with a facade until they are required. Learn how to defer third-parties with a facade
Legacy JavaScript  
Polyfills and transforms enable legacy browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile features, unless you know you must support legacy browsers. Baseline Learn why most sites can deploy ES6+ code without transpiling
Duplicated JavaScript  
Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.
Total Blocking Time 80 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more about the Total Blocking Time metric

Does rushjs.io use compression?

Website compression is the process of reducing the size of website files, such as HTML, CSS, JavaScript, and image files, to improve website performance and load times. Compressing website files can significantly reduce the amount of data that needs to be transferred from the server to the user's browser, resulting in faster page load times and improved user experience. Files on rushjs.io are reduced by 65%.
rushjs.io use gzip compression.
Original size: 16.2 KB
Compressed size: 5.54 KB
File reduced by: 10.65 KB (65%)

Google Safe Browsing

Google Safe Browsing is a service provided by Google that helps protect users from visiting websites that may contain malicious or harmful content, such as malware, phishing attempts, or deceptive software.
This site is not currently listed as suspicious

MyWot.com Reputation Ratings

MyWOT (short for "My Web of Trust") is a web-based reputation and rating service that provides users with information about the trustworthiness and safety of websites.
Status:
  SAFE

SSL Checker - SSL Certificate Verify

An SSL (Secure Sockets Layer) certificate is a digital certificate that establishes a secure encrypted connection between a web server and a user's web browser. It provides authentication and encryption, ensuring that data transmitted between the server and the browser remains private and protected. rushjs.io supports HTTPS.
 rushjs.io supports HTTPS
     
Verifying SSL Support. Please wait...
Common Name: rushjs.io
Organization:
Location:
Issuer: R11
Valid from: Apr 28 16:14:09 2025 GMT
Valid until: Jul 27 16:14:08 2025 GMT
Authority: CA:FALSE
Keysize: 2048 Bits
Common Name: R11
Organization: Let's Encrypt
Location: US
Issuer: ISRG Root X1
Valid from: Mar 13 00:00:00 2024 GMT
Valid until: Mar 12 23:59:59 2027 GMT
Authority: CA:TRUE
Keysize: 2048 Bits

Verify HTTP/2 Support

HTTP/2 (Hypertext Transfer Protocol version 2) is a major revision of the HTTP protocol, which is the foundation of data communication on the World Wide Web. It was developed as an improvement over the previous HTTP/1.1 version to enhance web performance and efficiency.
 rushjs.io supports HTTP/2
     
Verifying HTTP/2.0 Support. Please wait...

Http Header

HTTP headers are extra portions of records despatched among a consumer (which include an internet browser) and a server at some stage in an HTTP request or response. They offer instructions, metadata, or manipulate parameters for the conversation among the consumer and server.
server: GitHub.com
content-type: text/html; charset=utf-8
last-modified: Fri, 23 Aug 2024 01:26:59 GMT
access-control-allow-origin: *
etag: W/"66c7e563-40c8"
expires: Wed, 07 May 2025 04:44:02 GMT
cache-control: max-age=600
content-encoding: gzip
x-proxy-cache: MISS
x-github-request-id: AB1D:1725:2973EA:2E9F23:681AE2B7
accept-ranges: bytes
age: 0
date: Wed, 07 May 2025 04:34:02 GMT
via: 1.1 varnish
x-served-by: cache-chi-kigq8000046-CHI
x-cache: MISS
x-cache-hits: 0
x-timer: S1746592442.168233,VS0,VE37
vary: Accept-Encoding
x-fastly-request-id: 2aa7524683c993123951d4f042ddf226c1533e24
content-length: 5676

DNS Lookup

DNS entries (Domain Name System) are a critical component of the Internet infrastructure. They act as directories that translate human-readable domain names (such as example.com) to machine-readable IP addresses. DNS records are stored on DNS servers and help forward internet traffic efficiently.
Type Ip Target/Txt TTL
A 185.199.109.153 3537
A 185.199.108.153 3537
A 185.199.111.153 3537
A 185.199.110.153 3537
NS ns2-02.azure-dns.net 3537
NS ns1-02.azure-dns.com 3537
NS ns4-02.azure-dns.info 3537
NS ns3-02.azure-dns.org 3537
HINFO 300

Whois Lookup

Domain WHOIS is a public database that provides information about domain names, including registered owners, contact information, domain registrars, registration and expiration dates, name servers, and other relevant information. Domain registration for this website began on March 6, 2018 and will expire on March 6, 2024 if not renewed. This website is now assigned through the registrar NOM-IQ Ltd dba Com Laude. The WHOIS data for this website's domain was last updated on June 14, 2023.
Domain Created:
2018-03-06
Domain Expires:
2024-03-06
Domain Updated:
2023-06-14
Domain Age:
7 years 3 months 9 days
Domain Registrar:
NOM-IQ Ltd dba Com Laude
Domain Owner:
Microsoft Corporation
WhoIs:
 

Domain Name: rushjs.io
Registry Domain ID: 0c45252973f642febfd55292a6f2f093-DONUTS
Registrar WHOIS Server: whois.comlaude.com
Registrar URL: https://www.comlaude.com
Updated Date: 2023-06-14T20:25:16Z
Creation Date: 2018-03-06T00:22:47Z
Registrar Registration Expiration Date: 2024-03-06T00:00:00Z
Registrar: NOM-IQ Ltd dba Com Laude
Registrar IANA ID: 470
Domain Status: clientDeleteProhibited https://www.icann.org/epp#clientDeleteProhibited
Domain Status: clientTransferProhibited https://www.icann.org/epp#clientTransferProhibited
Domain Status: clientUpdateProhibited https://www.icann.org/epp#clientUpdateProhibited
Registry Registrant ID: comlde042510
Registrant Name: Domain Administrator
Registrant Organization: Microsoft Corporation
Registrant Street: One Microsoft Way
Registrant City: Redmond
Registrant State/Province: WA
Registrant Postal Code: 98052
Registrant Country: US
Registrant Phone: +1.4258828080
Registrant Phone Ext: 
Registrant Fax: +1.4259367329
Registrant Fax Ext: 
Registrant Email: email
Registry Admin ID: comlde042508
Admin Name: Domain Administrator
Admin Organization: Microsoft Corporation
Admin Street: One Microsoft Way
Admin City: Redmond
Admin State/Province: WA
Admin Postal Code: 98052
Admin Country: US
Admin Phone: +1.4258828080
Admin Phone Ext: 
Admin Fax: +1.4259367329
Admin Fax Ext: 
Admin Email: email
Registry Tech ID: comlde042514
Tech Name: MSN Hostmaster
Tech Organization: Microsoft Corporation
Tech Street: One Microsoft Way
Tech City: Redmond
Tech State/Province: WA
Tech Postal Code: 98052
Tech Country: US
Tech Phone: +1.4258828080
Tech Phone Ext: 
Tech Fax: +1.4259367329
Tech Fax Ext: 
Tech Email: email
Name Server: ns1-02.azure-dns.com
Name Server: ns2-02.azure-dns.net
Name Server: ns3-02.azure-dns.org
Name Server: ns4-02.azure-dns.info
DNSSEC: Unsigned Delegation
Registrar Abuse Contact Email: email
Registrar Abuse Contact Phone: +44.2074218250
URL of the ICANN WHOIS Data Problem Reporting System: http://wdprs.internic.net/
>>> Last update of WHOIS database: 2025-05-07T04:30:12Z