Atcoder.jp AtCoder
AtCoder is a programming contest site for anyone from beginners to experts. We hold weekly programming contests online.
Server IP address resolved: Yes
Http response code: 200
Response time: 0.77 sec.
Last Checked: 03/05/2023
Over the time atcoder.jp has been ranked as high as 94,634 in the world, while most of its traffic comes from Japan, where it reached as high as 6,360 position.
Atcoder.jp receives about 443 unique visitors and 6,202 pageviews per day. The estimated value of atcoder.jp is 105,120 USD. Each unique visitor makes about 14 pageviews on average.
Atcoder.jp is registered under .JP top-level domain. Check other websites in .JP zone.
At the time of the last check (November 24, 2019) atcoder.jp has an expired SSL certificate issued by Amazon (expired on June 26, 2020). Check other websites using SSL certificates issued by Amazon.
According to Google Safe Browsing, Google Safe Search and Symantec atcoder.jp is quite a safe domain.
Mobile-Friendly test indicates that atcoder.jp is well optimized for mobile and tablet devices.
Audience Geography. Where are atcoder.jp visitors located?
| Country | Rank |
|---|---|
 Nepal NP | 5609 |
| Japan JP | 6360 |
| Bangladesh BD | 29725 |
| India IN | 39223 |
| Egypt EG | 43655 |
| Country | Percent of 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 | Percent of Visitors |
|---|---|
| Japan JP | 80.7% |
| India IN | 9.4% |
| Egypt EG | 0.8% |
| Bangladesh BD | 0.5% |
| Nepal NP | 0.5% |
| Other | 8.2% |
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?
| 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% |
| 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% |
| Period | Global Rank | Global Rank Delta |
|---|---|---|
| past 3 months | 90449 | -5158 |
| past month | 70008 | -75947 |
| past week | 83828 | 29570 |
| yesterday | 107628 | -781811 |
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.
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.
"atcoder.jp" is not a phishing page.
"atcoder.jp" does not install unwanted software.
"atcoder.jp" 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.
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 |
| Algorithm | RSA-SHA256 |
| Valid form | 05/26/2019 |
| Expiration | 06/26/2020 |
| Signed | Certificate is not self signed |
| Additional Domains | atcoder.jp |
ASN ID: 16509
ASN Title: AMAZON-02 - Amazon.com, Inc., US
Last Update: 10/13/2023
#
# 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.
#
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.
#
[ 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] 2021/11/30
[状態] Active
[最終更新] 2020/12/01 01:05:08 (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] 06-7634-2727
[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
Last tested: 01/28/2019
| Total Resources | 46 |
| Number of Hosts | 9 |
| Static Resources | 28 |
| JavaScript Resources | 16 |
| CSS Resources | 4 |
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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