Atcoder.jp AtCoder
AtCoder is a programming contest site for anyone from beginners to experts. We hold weekly programming contests online.
Atcoder.jp Overview
Website Overview: atcoder.jp
AtCoder, also known as AtCoder.jp, is a programming contest site that caters to individuals with varying levels of programming expertise - from beginners to experts. The website offers a platform for users to participate in weekly programming contests, which are conducted online. The site's main objective is to provide a competitive environment for programmers to sharpen their skills, discover new programming techniques, and solve challenging problems.
In terms of traffic, AtCoder receives an average of 443 unique users per day, resulting in 6202 pageviews. This indicates that the website enjoys a reasonable level of popularity and engagement within the programming community. The site's value is estimated to be around 105120 US dollars, which reflects its significance and potential in the online programming contest industry.
AtCoder.jp is hosted by AMAZON-02, which is an indication of its reliance on the infrastructure provided by Amazon.com, Inc. This ensures a robust hosting environment that can handle high levels of user activity and traffic. Additionally, the website utilizes a Top Level Domain of .JP, which highlights its connection to Japan and potentially attracts a predominantly Japanese user base.
To ensure secure communication between users and the site, AtCoder.jp has implemented SSL (Secure Sockets Layer) encryption, with the SSL certificate issued by Amazon. This encryption protocol ensures that sensitive data, such as login credentials and personal information, is transmitted securely over the internet. This emphasis on security is crucial in maintaining user trust and confidence.
In terms of content, it is important to note that AtCoder.jp is primarily focused on programming contests and related activities. As such, it is tailored towards individuals with an interest in programming and may not necessarily be geared towards a general audience. However, it does not promote any objectionable or explicit content, making it generally family-friendly.
When considering the website's performance, PageSpeed Insights scores it at 60 for speed. While this score indicates room for improvement in terms of optimizing loading times, it is not below average. By addressing any speed-related issues, AtCoder.jp can enhance user experience and potentially attract more participants to its programming contests.
The website's impact can be observed through its significant number of external backlinks, amounting to 1485. These backlinks indicate that other websites recognize AtCoder.jp as a valuable resource within the programming community and often refer to it. This reflects its reputation as a reliable platform for programmers.
Overall, AtCoder.jp serves as a comprehensive programming contest site that
Atcoder.jp Rank Summary
Audience Geography. Where are atcoder.jp visitors located?
| Country | Visitors |
|---|---|
 Japan JP | 80.7% |
| India IN | 9.4% |
| Egypt EG | 0.8% |
| Bangladesh BD | 0.5% |
| Nepal NP | 0.5% |
| Other | 8.2% |
| Country | Pageviews |
|---|---|
| Japan JP | 91.5% |
| India IN | 4.9% |
| Nepal NP | 0.3% |
| Egypt EG | 0.3% |
| Bangladesh BD | 0.2% |
| Other | 2.8% |
| Country | Rank |
|---|---|
| Nepal NP | 5609 |
| Japan JP | 6360 |
| Bangladesh BD | 29725 |
| India IN | 39223 |
| Egypt EG | 43655 |
Where do visitors go on atcoder.jp?
| Subdomain | Pageviews |
|---|---|
| beta.atcoder.jp | 38.45% |
| contest.atcoder.jp | 33.51% |
| atcoder.jp | 26.31% |
| img.atcoder.jp | 1.14% |
| other | 0.59% |
| Subdomain | Pageviews per User |
|---|---|
| contest.atcoder.jp | 15 |
| beta.atcoder.jp | 12 |
| atcoder.jp | 7.2 |
| img.atcoder.jp | 1 |
| Subdomain | Reach |
|---|---|
| atcoder.jp | 57.48% |
| beta.atcoder.jp | 49.34% |
| contest.atcoder.jp | 33.89% |
| img.atcoder.jp | 17.49% |
How popular is atcoder.jp?
| Period | Global Rank | Global Rank Delta |
|---|---|---|
| past 3 months | 90449 | -5158 |
| past month | 70008 | -75947 |
| past week | 83828 | 29570 |
| yesterday | 107628 | -781811 |
| Days | Pageviews Rank | Pageviews Rank Delta | Pageviews per Million | Pageviews per Million Delta | Pageviews per User | Pageviews per User Delta |
|---|---|---|---|---|---|---|
| 90 | 35158 | -7242 | 19 | 26% | 14 | 20% |
| 30 | 25018 | -69536 | 28 | 360% | 16 | 100% |
| 7 | 22773 | -3285 | 32 | 10% | 20 | 100% |
| 1 | 140314 | -395383 | 4 | 800% | 2 | -72.846% |
| Days | Reach Rank | Reach Rank Delta | Reach per Million | Reach per Million Delta |
|---|---|---|---|---|
| 90 | 128714 | -3337 | 5 | 5% |
| 30 | 103592 | -79475 | 65 | 100% |
| 7 | 130944 | 56216 | 5 | -50.09% |
| 1 | 111304 | -882468 | 7 | 3000% |
Atcoder.jp Website Safety
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 ConnectSafe evaluates atcoder.jp for any unsafe and insecure content. The results are critical for families with young children.
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.
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.
McAfee assesses atcoder.jp 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 atcoder.jp for mature or inappropriate content, only security checks are evaluated.
The WOT calculates reputation of the atcoder.jp. This reputation system receives ratings from users and information from third-party sources, assesses the atcoder.jp for safety features and confirms, whether atcoder.jp is suitable for children.
| Domain | atcoder.jp |
| Issuer Organization | Amazon |
| Issuer | Amazon RSA 2048 M03 |
| Algorithm | RSA-SHA256 |
| Valid form | 05/31/2024 |
| Expiration | 06/29/2025 |
| Signed | Certificate is not self signed |
| Additional Domains |
atcoder.jp |
Atcoder.jp Rank History
Alexa Rank shows how popular atcoder.jp is in comparison with other sites. The most popular site has Alexa Rank equals 1. If atcoder.jp 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 atcoder.jp and pageviews on atcoder.jp over the past 3 months.
Atcoder.jp Hosting Information
ASN ID: 16509
ASN Title: AMAZON-02 - Amazon.com, Inc., USLast Update: 07/31/2024
#
# 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
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# Copyright 1997-2018, American Registry for Internet Numbers, Ltd.
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ASNumber: 16509
ASName: AMAZON-02
ASHandle: AS16509
RegDate: 2000-05-03
Updated: 2012-03-02
Ref: https://rdap.arin.net/registry/autnum/16509
OrgName: Amazon.com, Inc.
OrgId: AMAZON-4
Address: 1918 8th Ave
City: SEATTLE
StateProv: WA
PostalCode: 98101-1244
Country: US
RegDate: 1995-01-23
Updated: 2017-01-28
Ref: https://rdap.arin.net/registry/entity/AMAZON-4
OrgAbuseHandle: AEA8-ARIN
OrgAbuseName: Amazon EC2 Abuse
OrgAbusePhone: +1-206-266-4064
OrgAbuseEmail: abuse@amazonaws.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/AEA8-ARIN
OrgTechHandle: ANO24-ARIN
OrgTechName: Amazon EC2 Network Operations
OrgTechPhone: +1-206-266-4064
OrgTechEmail: amzn-noc-contact@amazon.com
OrgTechRef: https://rdap.arin.net/registry/entity/ANO24-ARIN
RTechHandle: AC6-ORG-ARIN
RTechName: Amazon-com Incorporated
RTechPhone: +1-206-266-2187
RTechEmail: ipmanagement@amazon.com
RTechRef: https://rdap.arin.net/registry/entity/AC6-ORG-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.
#
Atcoder.jp Domain Registration and Settings
[ JPRS database provides information on network administration. Its use is ]
[ restricted to network administration purposes. For further information, ]
[ use 'whois -h whois.jprs.jp help'. To suppress Japanese output, add'/e' ]
[ at the end of command, e.g. 'whois -h whois.jprs.jp xxx/e'. ]
Domain Information: [ドメイン情報]
[Domain Name] ATCODER.JP
[登録者名] AtCoder Inc.
[Registrant] AtCoder Inc.
[Name Server] ns-96.awsdns-12.com
[Name Server] ns-1144.awsdns-15.org
[Name Server] ns-890.awsdns-47.net
[Name Server] ns-1543.awsdns-00.co.uk
[Signing Key]
[登録年月日] 2014/11/15
[有効期限] 2024/11/30
[状態] Active
[最終更新] 2023/12/01 01:05:04 (JST)
Contact Information: [公開連絡窓口]
[名前] Whois情報公開代行サービス by バリュードメイン
[Name] Whois Privacy Protection Service by VALUE-DOMAIN
[Email] whoisproxy@value-domain.com
[Web Page] https://www.value-domain.com/
[郵便番号] 530-0011
[住所] 大阪府大阪市北区大深町3-1
グランフロント大阪 タワーB 23階
[Postal Address]
[電話番号] 06-6241-6585
[FAX番号] 06-6374-0121
| Host | A Record | TTL |
|---|---|---|
| atcoder.jp | 54.64.223.8 | 60 |
| atcoder.jp | 54.249.74.29 | 60 |
| Host | MX Record | Priority | TTL |
|---|---|---|---|
| atcoder.jp | aspmx.l.google.com | 10 | 300 |
| atcoder.jp | alt1.aspmx.l.google.com | 20 | 300 |
| atcoder.jp | alt2.aspmx.l.google.com | 20 | 300 |
| atcoder.jp | aspmx2.googlemail.com | 30 | 300 |
| atcoder.jp | aspmx3.googlemail.com | 30 | 300 |
| atcoder.jp | aspmx4.googlemail.com | 30 | 300 |
| atcoder.jp | aspmx5.googlemail.com | 30 | 300 |
| Host | NS Record | TTL |
|---|---|---|
| atcoder.jp | ns-1144.awsdns-15.org | 172800 |
| atcoder.jp | ns-1543.awsdns-00.co.uk | 172800 |
| atcoder.jp | ns-890.awsdns-47.net | 172800 |
| atcoder.jp | ns-96.awsdns-12.com | 172800 |
| Host | TXT Record | TTL |
|---|---|---|
| atcoder.jp | v=spf1 a:atcoder.jp a:api.atcoder.jp +ip4:183.177.145.0/28 include:_spf.google.com ?all | 300 |
ns-96.awsdns-12.com
TTL: 900
Email address: awsdns-hostmaster.amazon.com
Serial: 1
Refresh: 7200
Retry: 900
Expire: 1209600
Minimum: 86400
Atcoder.jp HTML Check
Atcoder.jp Desktop Performance
Last tested: 01/28/2019
| Total Resources | 46 |
| Number of Hosts | 9 |
| Static Resources | 28 |
| JavaScript Resources | 16 |
| CSS Resources | 4 |
Atcoder.jp Mobile Insights
Last tested: 01/28/2019
| Total Resources | 46 |
| Number of Hosts | 9 |
| Static Resources | 28 |
| JavaScript Resources | 16 |
| CSS Resources | 4 |
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