it-school.jp - robtex.com
it-school.jp
| DNSSEC | ⚠️ Not signed | ||||||
| A | 122.17.165.249🇯🇵 OCN122.16.0.0/12 (AS4713) CIDR BLOCK 82 NTT Communications Corporation 1-1-6 Uchisaiwai-cho, Chiyoda-ku Tokyo 100-8019 JAPAN | ||||||
| PTR | c155ltcl.mwprem.net | ||||||
| NS | mwns1.customer.ne.jp ⭐ | ||||||
| A | 210.150.23.210🇯🇵 InfoSphere210.150.0.0/16 INFOSPHERE | ||||||
| NS | mwns2.customer.ne.jp | ||||||
| A | 202.17.152.183🇯🇵 InfoSphere202.17.128.0/19 INFOSPHERE | ||||||
| MX | it-school.jp ⭐ | ||||||
| A | 122.17.165.249🇯🇵 OCN122.16.0.0/12 (AS4713) CIDR BLOCK 82 NTT Communications Corporation 1-1-6 Uchisaiwai-cho, Chiyoda-ku Tokyo 100-8019 JAPAN | ||||||
| PTR | c155ltcl.mwprem.net | ||||||
| TXT | v=spf1 +a include:_spf.mwprem.net ~all | ||||||
| SOA | mwns1.customer.ne.jphost-plan-ac@ntt.com serial=1613719482 | ||||||
jp
| DNSSEC | 🔒 Signed (DS record present) | ||||||
| NS | z.dns.jp ⭐ | ||||||
| NS | a.dns.jp | ||||||
| NS | b.dns.jp | ||||||
| NS | c.dns.jp | ||||||
| NS | d.dns.jp | ||||||
| NS | e.dns.jp | ||||||
| NS | f.dns.jp | ||||||
| NS | g.dns.jp | ||||||
| NS | h.dns.jp | ||||||
| SOA | z.dns.jproot@dns.jp serial=1774681203 | ||||||
MX for
it-school.jp |
Same first word
it-school.ch |
it-school.jp |
it-school.it |
it-school.net |
it-school.de |
it-school.pl |
it-school.ro |
it-school.ru |
it-school.eu |
it-school.ir |
it-school.be |
Similar names
DNS History
10 records (4 active, 6 former)
●NSmwns1.customer.ne.jp2026-02-17 → 2026-03-28 · 3 obs
● 2026-02-17 20:35:08
● 2026-03-28 07:21:02
●NSmwns2.customer.ne.jp2026-02-17 → 2026-03-28 · 3 obs
● 2026-02-17 20:35:08
● 2026-03-28 07:21:02
○NSns-231.dns.jp-e1.cloudn-service.com2016-04-29 → 2018-06-10 · 5 obs
● 2016-04-29 01:29:16
● 2018-06-10 17:54:58
○ 2026-02-17 20:35:08
○ 2026-03-28 07:21:02
○NSns-232.dns.jp-w1.cloudn-service.com2016-04-29 → 2018-06-10 · 5 obs
● 2016-04-29 01:29:16
● 2018-06-10 17:54:58
○ 2026-02-17 20:35:08
○ 2026-03-28 07:21:02
○NSns-233.dns.us-e1.cloudn-service.com2016-04-29 → 2018-06-10 · 5 obs
● 2016-04-29 01:29:16
● 2018-06-10 17:54:58
○ 2026-02-17 20:35:08
○ 2026-03-28 07:21:02
○NSns1.secure.net2015-07-16 → 2016-02-11 · 4 obs
● 2016-02-11 18:22:50
○ 2016-04-29 01:29:16
○ 2026-03-28 07:21:02
○NSns2.secure.net2015-07-16 → 2016-02-11 · 4 obs
● 2016-02-11 18:22:50
○ 2016-04-29 01:29:16
○ 2026-03-28 07:21:02
●MXit-school.jp2015-07-16 → 2026-03-28 · 2 obs
● 2026-03-28 07:21:02
●A122.17.165.2492026-02-17 → 2026-03-28 · 3 obs
● 2026-02-17 20:35:08
● 2026-03-28 07:21:02
○A153.149.195.122015-07-16 → 2018-06-10 · 4 obs
● 2018-06-10 17:54:58
○ 2026-02-17 20:35:08
○ 2026-03-28 07:21:02
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| jp | e.dns.jp, b.dns.jp, a.dns.jp, d.dns.jp... | - |
| it-school.jp | mwns1.customer.ne.jp, mwns2.customer.ne.jp | - |
✅ Authoritative Response
Server:210.150.23.210
NS records: mwns1.customer.ne.jp, mwns2.customer.ne.jp
🔒 DNSSEC Status
⚠️ Insecure (no DNSSEC)
No DS record for it-school.jp (unsigned zone)
⏱️ Timing
Total: 1307ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 122.17.165.249 |
| NS | 2 | mwns1.customer.ne.jp, mwns2.customer.ne.jp |
| MX | 1 | it-school.jp (pri: 10) |
| TXT | 1 | v=spf1 +a include:_spf.mwprem.net ~all |
| SOA | 1 | mwns1.customer.ne.jp host-plan-ac.ntt.co |
Analysis
Mail Server Role
it-school.jp is the mail server for it-school.jp.
IP Addresses
it-school.jp resolves to a single IP: 122.17.165.249.
Other host names share IP numbers with it-school.jp; for instance c155ltcl.mwprem.net.
Name Servers
it-school.jp has two name servers: mwns1.customer.ne.jp and mwns2.customer.ne.jp.
it-school.jp shares the same name server setup as other domains, for example is-guard.co.jp, aspack.co.jp, 37.112.61.in-addr.arpa, tak-materials.co.jp and kuchisakamoto-pref-shizuoka.jp.
Host names with a single IP:
mwns1.customer.ne.jp points to 210.150.23.210
mwns2.customer.ne.jp points to 202.17.152.183
Mail Servers
One mail server handles it-school.jp.
Host name it-school.jp points to IP 122.17.165.249.