constitution.jp is registered with whois.jprs.jp. We couldn't read an SSL certificate for it when we last analysed it.
What security vendors and the WOT community say about this domain.
1 of 5 protections set up
Lists the servers allowed to send email for this domain.
v=spf1 include:spf.protection.outlook.com ~allNo key at the 12 common selectors we checked. A custom selector can’t be found from DNS alone.
—No DMARC policy: receivers aren’t told what to do with mail that fails SPF and DKIM.
—Forces encrypted delivery between mail servers.
—Shows the brand logo in supporting inboxes. Optional; needs DMARC enforcement.
—Read from the domain's public DNS records.
What loads and tracks visitors when the homepage opens.
Running a full browser scan of the homepage… This takes about a minute.
We couldn't read an SSL certificate on port 443 when we last analysed constitution.jp. Refresh the analysis to check again.
Internet standards that make a site faster and safer.
Is constitution.jp’s name taken on other extensions?
| Host | Mail server | TTL |
|---|---|---|
| constitution.jp | 0 constitution-jp.mail.protection.outlook.com | 3600 |
| Host | Name server | TTL |
|---|---|---|
| constitution.jp | hans.ns.cloudflare.com | 86400 |
| constitution.jp | lisa.ns.cloudflare.com | 86400 |
| Host | Text | TTL |
|---|---|---|
| constitution.jp | "MS=ms87823787" | 3600 |
| constitution.jp | "v=spf1 include:spf.protection.outlook.com ~all" | 3600 |
| Host | Start of authority | TTL |
|---|---|---|
| constitution.jp | hans.ns.cloudflare.com dns.cloudflare.com 2415379578 10000 2400 604800 1800 | 1800 |
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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.
constitution.jp has no community safety rating yet. We couldn't read an SSL certificate on it when we last analysed it. See Security →
constitution.jp is registered through whois.jprs.jp. See WHOIS →
Raw registry data for constitution.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] CONSTITUTION.JP [登録者名] 自然科学部同好会 [Registrant] Shizen Kagakubu Dokokai [Name Server] hans.ns.cloudflare.com [Name Server] lisa.ns.cloudflare.com [Signing Key] [登録年月日] 2006/07/07 [有効期限] 2027/07/31 [状態] Active [最終更新] 2026/08/01 01:05:04 (JST) Contact Information: [公開連絡窓口] [名前] 株式会社ヒューメイア / ドメイン名登録者への連絡取次ぎ窓口 [Name] Humeia Corporation / JP Domain Service Division [Email] [email protected] [Web Page] [郵便番号] 100-0000 [住所] 以下のURLで、このドメイン名の登録者への連絡が可能です. https://ssl.d4u.jp/Contact.cgi FAQ ->https://jprs.jp/glossary/index.php?ID=0072 [Postal Address] See: https://ssl.d4u.jp/Contact.cgi [電話番号] 00-0000-0000 [FAX番号]
Four timed TCP connections to port 443 from CubDomain's servers.
CubDomain is not affiliated with constitution.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.
Searching the certificate transparency logs… This can take up to a minute.
When the site first appeared, and what has changed since.
No changes seen since we started recording on 23 Oct 2026.