pornogramxxx.com Pornogramxxx.com

   
Free *** Video Gram, *** *** Tube

Domain Summary

What is the traffic rank for Pornogramxxx.com?

• Pornogramxxx.com ranks #86,870 globally on HypeStat.

What percent of global Internet users visit Pornogramxxx.com?

• 0.0027613% of global Internet users visit Pornogramxxx.com

How many people visit Pornogramxxx.com each day?

• Pornogramxxx.com receives approximately 136.1K visitors and 272,195 page impressions per day.

Which countries does Pornogramxxx.com receive most of its visitors from?

• Pornogramxxx.com is mostly visited by people located in Poland,United States,Germany.

How much Pornogramxxx.com can earn?

• Pornogramxxx.com should earn about $877.91/day from advertising revenue.

What is Pornogramxxx.com estimated value?

• Estimated value of Pornogramxxx.com is $831,108.26.

What IP addresses does Pornogramxxx.com resolve to?

• Pornogramxxx.com resolves to the IP addresses 2606:4700:3035::6815:27e6, 104.21.39.230.

Where are Pornogramxxx.com servers located in?

• Pornogramxxx.com has servers located in United States.

pornogramxxx.com Profile

Title:Free *** Video Gram, *** *** Tube
Category:Adult / Adult
Edit Site Info

What technologies does pornogramxxx.com use?

These are the technologies used at pornogramxxx.com. pornogramxxx.com has a total of 3 technologies installed in 2 different categories.
CDN
CloudFlare CloudFlare
jsDelivr jsDelivr
Miscellaneous
HTTP/3 HTTP/3

pornogramxxx.com Traffic Analysis

Pornogramxxx.com is ranked #86,870 in the world. This website is viewed by an estimated 136.1K visitors daily, generating a total of 272.2K pageviews. This equates to about 4.1M monthly visitors. Pornogramxxx.com traffic has decreased by 10.09% compared to last month.
Daily Visitors136.1K
12.42%
Monthly Visits4.1M
10.09%
Pages per Visit2.00
3.73%
Visit duration01:26
3.41%
Bounce Rate67.17%
6.35%
Is this your site?Verify your site's metrics.
Daily Unique Visitors:
136,129
Monthly Visits:
4,124,709
Pages per Visit:
2.00
Daily Pageviews:
272,195
Avg. visit duration:
01:26
Bounce rate:
67.17%
Global Reach:
0.0027613%
Monthly Visits (SEMrush):
3,389,769
Monthly Unique Visitors (SEMrush):
2,724,346
Monthly Visits (SimilarWeb):
4,167,215
HypeRank:
86,870
SEMrush Rank:
1,099,300
SimilarWeb Rank:
18,583
*All traffic values are estimates only.

Traffic sources

Direct:
50.74%
Referral:
1.00%
Search:
47.59%
Social:
0.01%
Paid:
0.67%

Desktop vs Mobile

Desktop:
11.19%
Mobile:
88.81%

Total Visits Last 3 Months

4.6M
MAY
4.6M
JUN
4.1M
JUL

Visitors by country

Country
Users%
 
Poland 12.07%
 
United States 8.16%
 
Germany 6.07%
 
Brazil 5.19%
 
France 4.75%

Where do visitors go on pornogramxxx.com?

 
Reach%Pageviews%PerUser
pornogramxxx.com
100.00%100.00%1.55

Which sites are competitors to pornogramxxx.com?

Websites similar to pornogramxxx.com 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 203 days ago
     
This can take up to 60 seconds. Please wait...

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

Search Engine Indexes ▼

Search engine indexes are huge databases or collections of net pages that search engines like google like google and yahoo use to retrieve applicable facts while customers carry out searches. These indexes are created through search engines like google and yahoo through crawling and indexing net pages from throughout the internet.
Google Index:
242,000
Bing Index:
175,000
Baidu Index:
1

  ▼

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:
  pornogramxxx.com
Rank:
(Rank based on keywords, cost and organic traffic)
  1,099,300
Organic Keywords:
(Number of keywords in top 20 Google SERP)
  39,176
Organic Traffic:
(Number of visitors coming from top 20 search results)
  896
Organic Cost:
((How much need to spend if get same number of visitors from Google Adwords)
  $10.00
Full SEMrush Report >>

Revenue report ▼

Google.com would generate approximately $877.9 per day if the source of income were advertisements, which equates to an estimated monthly revenue of $26.3K and annual gross revenue of approximately $320.4K. Based on these figures, the site's net worth is estimated at around $831.1K.

How much would pornogramxxx.com make?

Daily Revenue:
$877.91
Monthly Revenue:
$26,337.30
Yearly Revenue:
$320,437.15
*All earnings values are estimates only.

Daily earning by country

 
CountryPageviewsEarning
 
United States 22,209$107.27
 
Germany 16,534$23.15
 
Brazil 14,125$18.79
 
Poland 32,857$13.14
 
France 12,924$7.50

Loss of money due to Adblock?

Daily Revenue Loss:
$32.31
Monthly Revenue Loss:
$969.30
Yearly Revenue Loss:
$11,793.19
Daily Pageviews Blocked:
21,904
Monthly Pageviews Blocked:
657,134
Yearly Pageviews Blocked:
7,995,126

Daily revenue loss by country

 
CountryBlockedLost Money
 
United States 3,998$19.31
 
Germany 4,795$6.71
 
Poland 10,843$4.34
 
Brazil 847$1.13
 
France 1,422$0.82

How much is pornogramxxx.com worth?

Website Value:
$831.1K

Ad Experience Report ▼

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

Mobile summary

Root domain:
pornogramxxx.com
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:
pornogramxxx.com
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:
pornogramxxx.com
Last Change Time:
(The last time that the site changed status.)
2023-07-21 17:28:04
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 pornogramxxx.com hosted? ▼

Pornogramxxx.com may be hosted in multiple data centers distributed in different locations around the world. This is probably just one of them.
Server IP:
2606:4700:3035::6815:27e6, 104.21.39.230
ASN:
AS13335 
ISP:
Cloudflare Inc 
Server Location:

United States, US
 

Other sites hosted on 104.21.39.230

There are no other sites hosted on this IP

How fast does pornogramxxx.com load? ▼

The average loading time of pornogramxxx.com is 483 ms. The Desktop speed index is 100 and mobile speed index is 86.
Average Load Time:
483 ms

Page Speed (Google PageSpeed Insights) - Desktop

100
0-49 50-89 90-100 i

Field Data

Over the last 30 days, the field data shows that this page has a AVERAGE 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 100% of loads for this page have a fast (<0.01s) Cumulative Layout Shift (CLS) 100% 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)898ms 74% of loads for this page have a fast (<0.8s) Time To First Byte (TTFB) 74% 24% of loads for this page have an average (0.8s ~ 1.8s) Time To First Byte (TTFB) 24% 2% of loads for this page have a slow (>1.8s) Time To First Byte (TTFB) 2%
First Contentful Paint (FCP)1.5s 88% of loads for this page have a fast (<1.8s) First Contentful Paint (FCP) 88% 8% of loads for this page have an average (1.8s ~ 3s) First Contentful Paint (FCP) 8% 3% of loads for this page have a slow (>3s) First Contentful Paint (FCP) 3%
First Input Delay (FID)3ms 100% of loads for this page have a fast (<100ms) First Input Delay (FID) 100% 0% of loads for this page have an average (100ms ~ 300ms) First Input Delay (FID) 0% 0% of loads for this page have a slow (>300ms) First Input Delay (FID) 0%
Interaction To Next Paint (INP)0 0% of loads for this page have a fast (<0ms) Interaction To Next Paint (INP) 0% 0% of loads for this page have an average (0ms ~ 0ms) Interaction To Next Paint (INP) 0% 0% of loads for this page have a slow (>0ms) Interaction To Next Paint (INP) 0%
Largest Contentful Paint (LCP)1.8s 89% of loads for this page have a fast (<2500ms) Largest Contentful Paint (LCP) 89% 6% of loads for this page have an average (2500ms ~ 4000ms) Largest Contentful Paint (LCP) 6% 4% of loads for this page have a slow (>4000ms) Largest Contentful Paint (LCP) 4%

Origin Data

All pages served from this origin have an 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)0 0% of loads for this page have a fast (<0s) Cumulative Layout Shift (CLS) 0% 0% of loads for this page have an average (0s ~ 0s) Cumulative Layout Shift (CLS) 0% 0% of loads for this page have a slow (>0s) Cumulative Layout Shift (CLS) 0%
Time To First Byte (TTFB)0 0% of loads for this page have a fast (<0s) Time To First Byte (TTFB) 0% 0% of loads for this page have an average (0s ~ 0s) Time To First Byte (TTFB) 0% 0% of loads for this page have a slow (>0s) Time To First Byte (TTFB) 0%
First Contentful Paint (FCP)0 0% of loads for this page have a fast (<0s) First Contentful Paint (FCP) 0% 0% of loads for this page have an average (0s ~ 0s) First Contentful Paint (FCP) 0% 0% of loads for this page have a slow (>0s) First Contentful Paint (FCP) 0%
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)0 0% of loads for this page have a fast (<0ms) Interaction To Next Paint (INP) 0% 0% of loads for this page have an average (0ms ~ 0ms) Interaction To Next Paint (INP) 0% 0% of loads for this page have a slow (>0ms) Interaction To Next Paint (INP) 0%
Largest Contentful Paint (LCP)0 0% of loads for this page have a fast (<0ms) Largest Contentful Paint (LCP) 0% 0% of loads for this page have an average (0ms ~ 0ms) Largest Contentful Paint (LCP) 0% 0% of loads for this page have a slow (>0ms) Largest Contentful Paint (LCP) 0%

Lab Data

Timing budget  
Set a timing budget to help you keep an eye on the performance of your site. Performant sites load fast and respond to user input events quickly. Learn more
Speed Index 0.7 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more
Total Blocking Time 10 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more
Has a `<meta name="viewport">` tag with `width` or `initial-scale`  
A `<meta name="viewport">` not only optimizes your app for mobile screen sizes, but also prevents . a 300 millisecond delay to user input Learn more
Avoids `unload` event listeners  
The `unload` event does not fire reliably and listening for it can prevent browser optimizations like the Back-Forward Cache. Use `pagehide` or `visibilitychange` events instead. Learn more
Largest Contentful Paint 0.8 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn more
First Meaningful Paint 0.5 s
First Meaningful Paint measures when the primary content of a page is visible. Learn more
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 more
Time to Interactive 0.5 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more
Performance budget  
Keep the quantity and size of network requests under the targets set by the provided performance budget. Learn more
First Contentful Paint 0.3 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more
Max Potential First Input Delay 60 ms
The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more

Page Speed (Google PageSpeed Insights) - Mobile

86
0-49 50-89 90-100 i

Field Data

Over the last 30 days, the field data shows that this page has a AVERAGE 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 100% 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)1.1s 74% of loads for this page have a fast (<800s) Time To First Byte (TTFB) 52% 38% of loads for this page have an average (800s ~ 1800s) Time To First Byte (TTFB) 38% 9% of loads for this page have a slow (>1800s) Time To First Byte (TTFB) 9%
First Contentful Paint (FCP)1.7s 88% of loads for this page have a fast (<1.8s) First Contentful Paint (FCP) 78% 13% of loads for this page have an average (1.8s ~ 3s) First Contentful Paint (FCP) 13% 8% of loads for this page have a slow (>3s) First Contentful Paint (FCP) 8%
First Input Delay (FID)31ms 94% of loads for this page have a fast (<100ms) First Input Delay (FID) 94% 3% of loads for this page have an average (100ms ~ 300ms) First Input Delay (FID) 3% 1% of loads for this page have a slow (>300ms) First Input Delay (FID) 1%
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)2.0s 89% of loads for this page have a fast (<2500s) Largest Contentful Paint (LCP) 83% 10% of loads for this page have an average (2500s ~ 4000s) Largest Contentful Paint (LCP) 10% 6% of loads for this page have a slow (>4000s) Largest Contentful Paint (LCP) 6%

Origin Data

All pages served from this origin have an SLOW 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)3ms 88% of loads for this page have a fast (<0.01s) Cumulative Layout Shift (CLS) 88% 5% of loads for this page have an average (0.01s ~ 0.025s) Cumulative Layout Shift (CLS) 5% 6% of loads for this page have a slow (>0.025s) Cumulative Layout Shift (CLS) 6%
Time To First Byte (TTFB)738ms 78% of loads for this page have a fast (<0.8s) Time To First Byte (TTFB) 78% 15% of loads for this page have an average (0.8s ~ 1.8s) Time To First Byte (TTFB) 15% 6% of loads for this page have a slow (>1.8s) Time To First Byte (TTFB) 6%
First Contentful Paint (FCP)1.4s 85% of loads for this page have a fast (<1.8s) First Contentful Paint (FCP) 85% 8% of loads for this page have an average (1.8s ~ 3s) First Contentful Paint (FCP) 8% 6% of loads for this page have a slow (>3s) First Contentful Paint (FCP) 6%
First Input Delay (FID)20ms 0% of loads for this page have a fast (<100ms) First Input Delay (FID) 95% 3% of loads for this page have an average 100ms ~ 300ms) First Input Delay (FID) 3% 1% of loads for this page have a slow (>300ms) First Input Delay (FID) 1%
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)4.2s 54% of loads for this page have a fast (<2.5s)Largest Contentful Paint (LCP) 54% 18% of loads for this page have an average (2.5s ~ 4s)Largest Contentful Paint (LCP) 18% 27% of loads for this page have a slow (>4s)Largest Contentful Paint (LCP) 27%

Lab Data

First Meaningful Paint 1.7 s
First Meaningful Paint measures when the primary content of a page is visible. Learn more
First Contentful Paint (3G) 1920 ms
First Contentful Paint 3G marks the time at which the first text or image is painted while on a 3G network. Learn more
Speed Index 2.3 s
Speed Index shows how quickly the contents of a page are visibly populated. Learn more
First Contentful Paint 1.0 s
First Contentful Paint marks the time at which the first text or image is painted. Learn more
Largest Contentful Paint 1.2 s
Largest Contentful Paint marks the time at which the largest text or image is painted. Learn more
Performance budget  
Keep the quantity and size of network requests under the targets set by the provided performance budget. Learn more
Total Blocking Time 420 ms
Sum of all time periods between FCP and Time to Interactive, when task length exceeded 50ms, expressed in milliseconds. Learn more
Avoids `unload` event listeners  
The `unload` event does not fire reliably and listening for it can prevent browser optimizations like the Back-Forward Cache. Use `pagehide` or `visibilitychange` events instead. Learn more
Time to Interactive 5.8 s
Time to interactive is the amount of time it takes for the page to become fully interactive. Learn more
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 more
Has a `<meta name="viewport">` tag with `width` or `initial-scale`  
A `<meta name="viewport">` not only optimizes your app for mobile screen sizes, but also prevents . a 300 millisecond delay to user input Learn more
Timing budget  
Set a timing budget to help you keep an eye on the performance of your site. Performant sites load fast and respond to user input events quickly. Learn more
Max Potential First Input Delay 260 ms
The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more

Does pornogramxxx.com 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 pornogramxxx.com are reduced by 84%.
pornogramxxx.com use br compression.
Original size: 144.79 KB
Compressed size: 22.41 KB
File reduced by: 122.38 KB (84%)

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. pornogramxxx.com has 80 Safety Reputations.
Status:
  SAFE
Safety Reputations:
  80
Safety Confidence:
  51
Child Safety Reputations:
  10
Child Safety Confidence:
  51

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. pornogramxxx.com supports HTTPS.
 pornogramxxx.com supports HTTPS
     
Verifying SSL Support. Please wait...
Common Name: pornogramxxx.com
Organization:
Location:
Issuer: WE1
Valid from: Jul 9 16:41:34 2024 GMT
Valid until: Oct 7 16:41:33 2024 GMT
Authority: CA:FALSE
Keysize:
Common Name: WE1
Organization: Google Trust Services
Location: US
Issuer: GTS Root R4
Valid from: Dec 13 09:00:00 2023 GMT
Valid until: Feb 20 14:00:00 2029 GMT
Authority: CA:TRUE
Keysize:
Common Name: GTS Root R4
Organization: Google Trust Services LLC
Location: US
Issuer: GlobalSign Root CA
Valid from: Nov 15 03:43:21 2023 GMT
Valid until: Jan 28 00:00:42 2028 GMT
Authority: CA:TRUE
Keysize:

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.
 pornogramxxx.com 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. 
date: Tue, 13 Aug 2024 23:55:43 GMT
content-type: text/html; charset=utf-8
x-frame-options: SAMEORIGIN
cf-cache-status: DYNAMIC
report-to: {"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=tjSO2vEftHbQC2Dfc3WH05LyEoIQTgqBegbEuWOOVU7UArLS2pBwpumoSzoqAhlPJXvj1bXoKDnhp5hiSm%2BQMfwn2GWBYOMBbcd3QkTRRZPGeZg18lxP2B7QskR7jVOMcVG3"}],"group":"cf-nel","max_age":604800}
nel: {"success_fraction":0,"report_to":"cf-nel","max_age":604800}
server: cloudflare
cf-ray: 8b2ca3380f8d2258-ORD
content-encoding: br
alt-svc: h3=":443"; ma=86400

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
AAAA 2606:4700:3032::ac43:95af 56
AAAA 2606:4700:3035::6815:27e6 56
A 104.21.39.230 56
A 172.67.149.175 56
NS collins.ns.cloudflare.com 172556
NS mark.ns.cloudflare.com 172556
HINFO 3600

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 22, 2021 and will expire on March 22, 2025 if not renewed. This website is now assigned through the registrar NameCheap, Inc.. The WHOIS data for this website's domain was last updated on March 8, 2024.
Domain Created:
2021-03-22
Domain Expires:
2025-03-22
Domain Updated:
2024-03-08
Domain Age:
3 years 14 days
Domain Registrar:
NameCheap, Inc.
Domain Owner:
Privacy service provided by Withheld for Privacy e
WhoIs:
 

   Domain Name: PORNOGRAMXXX.COM
   Registry Domain ID: 2599835165_DOMAIN_COM-VRSN
   Registrar WHOIS Server: whois.namecheap.com
   Registrar URL: http://www.namecheap.com
   Updated Date: 2024-03-08T23:26:11Z
   Creation Date: 2021-03-22T18:35:13Z
   Registry Expiry Date: 2025-03-22T18:35:13Z
   Registrar: NameCheap, Inc.
   Registrar IANA ID: 1068
   Registrar Abuse Contact Email: email
   Registrar Abuse Contact Phone: +1.6613102107
   Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
   Name Server: COLLINS.NS.CLOUDFLARE.COM
   Name Server: MARK.NS.CLOUDFLARE.COM
   DNSSEC: unsigned
   URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2024-08-13T23:56:51Z