opu.jp - robtex.com

opu.jp

DNSSEC⚠️ Not signed
NSdns-x.sinet.ad.jp ⚠️ Not in zone NS records
A2001:2f8:0:10::53🇯🇵 SINET-AS2001:2f8::/32 SINET CIDR Block
PTRdns-x1.sinet.ad.jp
PTRdns-x.sinet.ad.jp
A2001:2f8:0:11::53🇯🇵 SINET-AS2001:2f8::/32 SINET CIDR Block
PTRdns-x2.sinet.ad.jp
PTRdns-x.sinet.ad.jp
A2001:2f8:0:12::53🇯🇵 SINET-AS2001:2f8::/32 SINET CIDR Block
PTRdns-x3.sinet.ad.jp
PTRdns-x.sinet.ad.jp
A150.100.18.2🇯🇵 SINET-AS150.100.0.0/16 SINET CIDR Block
PTRdns-x1.sinet.ad.jp
PTRdns-x.sinet.ad.jp
A150.100.18.6🇯🇵 SINET-AS150.100.0.0/16 SINET CIDR Block
PTRdns-x2.sinet.ad.jp
PTRdns-x.sinet.ad.jp
A150.100.18.10🇯🇵 SINET-AS150.100.0.0/16 SINET CIDR Block
PTRdns-x3.sinet.ad.jp
PTRdns-x.sinet.ad.jp
NSns1.omu.ac.jp ⚠️ Not in zone NS records
A163.226.194.11🇯🇵 SINET-AS163.226.0.0/16 Osaka Prefecture University
PTRns1.omu.ac.jp
NSns2.omu.ac.jp ⚠️ Not in zone NS records
A163.226.194.12🇯🇵 SINET-AS163.226.0.0/16 Osaka Prefecture University
PTRns2.omu.ac.jp

jp

DNSSEC🔒 Signed (DS record present)
NSz.dns.jp ⭐
NSa.dns.jp
NSb.dns.jp
NSc.dns.jp
NSd.dns.jp
NSe.dns.jp
NSf.dns.jp
NSg.dns.jp
NSh.dns.jp
SOAz.dns.jproot@dns.jp serial=1785483002

Same first word

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pou.pl
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puo.co
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oup.info
pou.cat
oup.eu
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oup.gr
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oup.vc
oup.se
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uop.nl
oup.com
oup.co.uk
puo.de
pou.org.ua
pou.cc
upo.net
upo.lt
pou.ru
puo.fr
pou.com
pou.co.za
uop.com.br

DNS History

8 records (3 active, 5 former)

202120222023202420252026NSdns-x.sinet.ad.jpns1.omu.ac.jpns2.omu.ac.jp01.dnsv.jp02.dnsv.jp03.dnsv.jp04.dnsv.jpMXmx2.opu.jp
○NS01.dnsv.jp2020-04-08 → 2021-02-11 · 4 obs
● 2020-04-08 04:03:58
● 2021-02-11 07:53:36
○ 2026-07-31 07:43:14
○ 2026-07-31 07:43:16
○NS02.dnsv.jp2020-04-08 → 2021-02-11 · 4 obs
● 2020-04-08 04:03:58
● 2021-02-11 07:53:36
○ 2026-07-31 07:43:14
○ 2026-07-31 07:43:16
○NS03.dnsv.jp2020-04-08 → 2021-02-11 · 4 obs
● 2020-04-08 04:03:58
● 2021-02-11 07:53:36
○ 2026-07-31 07:43:14
○ 2026-07-31 07:43:16
○NS04.dnsv.jp2020-04-08 → 2021-02-11 · 4 obs
● 2020-04-08 04:03:58
● 2021-02-11 07:53:36
○ 2026-07-31 07:43:14
○ 2026-07-31 07:43:16
●NSdns-x.sinet.ad.jp2026-07-31 → 2026-07-31 · 3 obs
○ 2021-02-11 07:53:36
● 2026-07-31 07:43:14
● 2026-07-31 07:43:16
●NSns1.omu.ac.jp2026-07-31 → 2026-07-31 · 3 obs
○ 2021-02-11 07:53:36
● 2026-07-31 07:43:14
● 2026-07-31 07:43:16
●NSns2.omu.ac.jp2026-07-31 → 2026-07-31 · 3 obs
○ 2021-02-11 07:53:36
● 2026-07-31 07:43:14
● 2026-07-31 07:43:16
○MXmx2.opu.jp2020-04-08 → 2021-02-11 · 4 obs
● 2020-04-08 04:03:58
● 2021-02-11 07:53:36
○ 2026-07-31 07:43:14
○ 2026-07-31 07:43:16

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
jpa.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp...-
opu.jpns2.omu.ac.jp, dns-x.sinet.ad.jp, ns1.omu.ac.jp2 records

✅ Authoritative Response

Server:150.100.18.6

NS records: ns2.omu.ac.jp, dns-x.sinet.ad.jp, ns1.omu.ac.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for opu.jp (unsigned zone)

⏱️ Timing

Total: 1204ms | Queries: -

📄 Records

TypeCountSample Data

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns1.omu.ac.jp, ns2.omu.ac.jp)

Analysis

Name Servers

opu.jp carries NS records delegating to ns1.omu.ac.jp, ns2.omu.ac.jp and dns-x.sinet.ad.jp.

At least some of opu.jp's name servers are shared with other domains, for example ygjh.ed.jp, koshigaya.bunkyo.ac.jp, 129.137.210.in-addr.arpa and two more.

These name servers tend to co-occur with ex-dns01.osaka-cu.ac.jp, opu-dns01.osakafu-u.ac.jp, opu-dns02.osakafu-u.ac.jp and 7 other name servers in the same DNS delegations.

Hostnames that resolve to 6 IP addresses:

dns-x.sinet.ad.jp resolves to 150.100.18.2, 150.100.18.6 and 150.100.18.10 among others, with 3 other IP addresses in total.

Hosts with just one IP address:

The hostname ns1.omu.ac.jp resolves to 163.226.194.11.

The hostname ns2.omu.ac.jp resolves to 163.226.194.12.