atcoder.jp is registered with whois.jprs.jp and is hosted on AS16509 Amazon.com Inc. in Australia. Its SSL certificate from Amazon expired on 29 Jul 2024. WOT's community rates its safety excellent (80/100).
What security vendors and the WOT community say about this domain.
What loads and tracks visitors when the homepage opens.
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Is atcoder.jp’s name taken on other extensions?
Estimated visitors and engagement.
| Top countries | Share | Visits | Desktop | Mobile |
|---|---|---|---|---|
| Japan | 66% | 530,513 | 20.7% | 79.3% |
| India | 9.8% | 78,587 | 100% | 0% |
| United States | 8.8% | 70,419 | 69.1% | 30.9% |
| Russia | 5.5% | 43,888 | 90.1% | 9.9% |
| Philippines | 2.2% | 18,019 | 100% | 0% |
2 technologies detected across 2 categories.
Detected from headers, page source and DNS · Automatic and may be incomplete · Suggest a correction
Every IP address atcoder.jp resolves to, and where it's hosted.
| Host | IPv4 address | TTL |
|---|---|---|
| atcoder.jp | 52.84.206.111 | 60 |
| atcoder.jp | 52.84.206.122 | 60 |
| atcoder.jp | 52.84.206.28 | 60 |
| atcoder.jp | 52.84.206.58 | 60 |
| Host | Mail server | TTL |
|---|---|---|
| atcoder.jp | 10 aspmx.l.google.com | 300 |
| atcoder.jp | 20 alt1.aspmx.l.google.com | 300 |
| atcoder.jp | 20 alt2.aspmx.l.google.com | 300 |
| atcoder.jp | 30 aspmx2.googlemail.com | 300 |
| atcoder.jp | 30 aspmx3.googlemail.com | 300 |
| atcoder.jp | 30 aspmx4.googlemail.com | 300 |
| atcoder.jp | 30 aspmx5.googlemail.com | 300 |
| Host | Name server | TTL |
|---|---|---|
| atcoder.jp | ns-1144.awsdns-15.org | 21600 |
| atcoder.jp | ns-1543.awsdns-00.co.uk | 21600 |
| atcoder.jp | ns-890.awsdns-47.net | 21600 |
| atcoder.jp | ns-96.awsdns-12.com | 21600 |
| Host | Text | TTL |
|---|---|---|
| atcoder.jp | "google-site-verification=iiXXCv8YJjdE0FWPz6zq0ispBt688ytJaOQfOpwuU3A" | 300 |
| atcoder.jp | "google-site-verification=IIyyB5yMWakA7SnvZLuqk-eBDlEj647aY0Rq-c80uIg" | 300 |
| atcoder.jp | "MS=ms90685883" | 300 |
| atcoder.jp | "pardot884953=58ccd91e72a6f94be7450fef89ee32f712f9e18afb5273954e7d09781c220ec1" | 300 |
| atcoder.jp | "v=spf1 a:atcoder.jp a:api.atcoder.jp +ip4:183.177.145.0/28 include:_spf.google.com include:aspmx.pardot.com include:amazonses.com ?all" | 300 |
| Host | Start of authority | TTL |
|---|---|---|
| atcoder.jp | ns-96.awsdns-12.com awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400 | 900 |
Other domains served from 52.84.206.122. Normal for shared hosting and CDNs.
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Reviews are from CubDomain users and are separate from the security verdicts above.
Common questions, answered from this report's data.
WOT's community rates atcoder.jp excellent for safety (80/100). Its SSL certificate expired on 29 Jul 2024. See Security →
atcoder.jp is registered through whois.jprs.jp. The owner's details are hidden by a privacy service in the public WHOIS record. See WHOIS →
atcoder.jp is served from 4 IP addresses, mainly on AS16509 Amazon.com Inc. in Australia. See Hosting →
We detected 2 technologies, including Google Analytics and jQuery. See Built with →
Raw registry data for atcoder.jp. May be redacted by privacy services.
[ 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] [email protected] [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
Four timed TCP connections to port 443 from CubDomain's servers.
CubDomain is not affiliated with atcoder.jp. Data is collected independently from public sources and some figures are estimates, provided for information only.
Spam and malware blocklists for the site's IP and mail servers.
Found in public certificate transparency logs.
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When the site first appeared, and what has changed since.
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