cas.or.jp - robtex.com
cas.or.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 118.243.56.243🇯🇵 ASAHI-NET118.243.0.0/16 | ||||||
| PTR | y056243.ppp.asahi-net.or.jp | ||||||
| NS | cas.or.jp ⭐ | ||||||
| A | 118.243.56.243🇯🇵 ASAHI-NET118.243.0.0/16 | ||||||
| PTR | y056243.ppp.asahi-net.or.jp | ||||||
| NS | donguri.org.uk | ||||||
| NS | ns.itodenwa.com | ||||||
| A | 118.243.56.243🇯🇵 ASAHI-NET118.243.0.0/16 | ||||||
| PTR | y056243.ppp.asahi-net.or.jp | ||||||
| NS | ns1.maihama-net.com | ||||||
| A | 160.16.54.90🇯🇵 SAKURA-B160.16.0.0/17 SAKURA Internet // EAST JAPAN BACKBONE Sakaisuji Honmachi Bldg. 9F 1-8-14 Minami-Honmachi, Chuo-ku Osaka 541-0054, Japan | ||||||
| PTR | ns1.maihama-net.com | ||||||
| NS | ns3.maihama-net.com | ||||||
| A | 153.120.38.37🇯🇵 SAKURA-A153.120.0.0/17 (2/ISHIKARI) SAKURA Internet // HOKKAIDO BACKBONE 1-8-14 Minami-Honmachi, Chuo-ku, Osaka 541-0054, Japan | ||||||
| PTR | ns3.maihama-net.com | ||||||
| NS | y056243.ppp.asahi-net.or.jp | ||||||
| A | 118.243.56.243🇯🇵 ASAHI-NET118.243.0.0/16 | ||||||
| PTR | y056243.ppp.asahi-net.or.jp | ||||||
| MX | ns.itodenwa.com ⭐ | ||||||
| A | 118.243.56.243🇯🇵 ASAHI-NET118.243.0.0/16 | ||||||
| PTR | y056243.ppp.asahi-net.or.jp | ||||||
| MX | donguri.org.uk(100) | ||||||
| TXT | v=spf1 +ip4:118.243.56.243 -all | ||||||
| SOA | cas.or.jproot@cas.or.jp 2022-06-02 #4 | ||||||
or.jp
| DNSSEC | ⚠️ Not signed | ||||||
| TXT | or.jp. | ||||||
Overview
or.jp is a second-level domain under Japan's country code top-level domain (.jp), reserved exclusively for non-profit and organizational entities. It is managed by Japan Registry Services Co., Ltd. (JPRS), the authoritative registry for all .jp domains.
Eligible Registrants
Registration is restricted to Japanese non-profit organizations, including:
- Foundations (財団法人) and associations (社団法人)
- Medical corporations, audit firms, and religious organizations
- NPOs (特定非営利活動法人) and special corporations
- Agricultural and consumer cooperatives
- International organizations and their Japanese branches
- Foreign government embassies and consulates in Japan
Generally, each organization may register only one or.jp domain.
DNS Infrastructure
The or.jp zone is served by Japan's robust DNS infrastructure:
- Nameservers: a.dns.jp through h.dns.jp (8 anycast servers)
- Primary SOA: z.dns.jp
- DNSSEC: Fully signed with validated chain of trust from root
- Registry: JPRS (Japan Registry Services)
The domain hosts hundreds of subdomains for Japanese nonprofits, NGOs, professional associations, and public-interest organizations.
NS for
cas.or.jp |
Subdomains
www.cas.or.jp |
Same first word
Similar names
DNS History
9 records (9 active, 0 former)
●NScas.or.jp2015-12-20 → 2026-07-11 · 3 obs
● 2015-12-20 14:32:02
● 2026-07-11 10:40:00
●NSdonguri.org.uk2015-12-20 → 2026-07-11 · 3 obs
● 2015-12-20 14:32:02
● 2026-07-11 10:40:00
●NSns.itodenwa.com2015-12-20 → 2026-07-11 · 3 obs
● 2015-12-20 14:32:02
● 2026-07-11 10:40:00
●NSns1.maihama-net.com2015-12-20 → 2026-07-11 · 3 obs
● 2015-12-20 14:32:02
● 2026-07-11 10:40:00
●NSns3.maihama-net.com2015-12-20 → 2026-07-11 · 3 obs
● 2015-12-20 14:32:02
● 2026-07-11 10:40:00
●NSy056243.ppp.asahi-net.or.jp2015-08-25 → 2026-07-11 · 4 obs
○ 2015-12-20 14:32:02
● 2017-09-01 13:25:46
● 2026-07-11 10:40:00
●MXns.itodenwa.com2015-08-25 → 2026-07-11 · 2 obs
● 2026-07-11 10:40:00
●A118.243.56.2432015-08-25 → 2026-07-11 · 2 obs
● 2026-07-11 10:40:00
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | e.dns.jp, f.dns.jp, g.dns.jp, h.dns.jp... | - |
| cas.or.jp | y056243.ppp.asahi-net.or.jp, ns.itodenwa.com, ns1.maihama-net.com, ns3.maihama-net.com... | - |
✅ Authoritative Response
Server:153.120.38.37
NS records: y056243.ppp.asahi-net.or.jp, ns.itodenwa.com, ns1.maihama-net.com, ns3.maihama-net.com, donguri.org.uk
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for cas.or.jp (unsigned zone)
⏱️ Timing
Total: 1610ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 118.243.56.243 |
| NS | 5 | ns1.maihama-net.com, ns3.maihama-net.com... |
| MX | 2 | ns.itodenwa.com (pri: 10), donguri.org.uk (pri: 100) |
| TXT | 1 | v=spf1 +ip4:118.243.56.243 -all |
| SOA | 1 | cas.or.jp root.cas.or.jp |
Analysis
Hierarchy
cas.or.jp serves as the parent of www.cas.or.jp.
Name Server Role
cas.or.jp is listed as a name server for cas.or.jp — it is in-bailiwick, authoritative for its own domain.
It is common to see ns.itodenwa.com, ns1.maihama-net.com and ns3.maihama-net.com acting as name servers in combination with cas.or.jp.
IP Addresses
cas.or.jp has exactly one IP address — 118.243.56.243.
Among the host names that share IP numbers with cas.or.jp is y056243.ppp.asahi-net.or.jp, as one example.
Name Servers
DNS for cas.or.jp is delegated to 6 name servers: cas.or.jp, ns.itodenwa.com, ns1.maihama-net.com plus 3 other.
cas.or.jp has at least partial name server overlap with other domains, such as aqwiki.net, danjiri.org, denshisyuppan.co.jp and two others.
ns2.maihama-net.com, 2nd.dnsv.jp and ns1.gunvolt.com — plus 5 other name servers — are commonly paired with these name servers.
Host names resolving to a single IP address:
ns.itodenwa.com resolves to the IP address 118.243.56.243.
ns1.maihama-net.com resolves to the IP address 160.16.54.90.
ns3.maihama-net.com resolves to the IP address 153.120.38.37.
cas.or.jp resolves to the IP address 118.243.56.243.
y056243.ppp.asahi-net.or.jp resolves to the IP address 118.243.56.243.
Three host names point to 118.243.56.243: ns.itodenwa.com, cas.or.jp and y056243.ppp.asahi-net.or.jp.
Mail Servers
cas.or.jp uses two mail servers, ns.itodenwa.com and donguri.org.uk.
The mail servers of cas.or.jp are at least partially shared with other domains, including itodenwa.com.