cloud21.jp - dns.ninja

cloud21.jp

DNSSEC⚠️ Not signed
A153.120.3.184🇯🇵 SAKURA-A153.120.0.0/17 (2/ISHIKARI) SAKURA Internet // HOKKAIDO BACKBONE 1-8-14 Minami-Honmachi, Chuo-ku, Osaka 541-0054, Japan
PTRik1-204-75930.vs.sakura.ne.jp
NSmaster.dns.ne.jp ⭐
A210.224.172.18🇯🇵 SAKURA-C210.224.160.0/19 (1/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan
PTRmaster.dns.ne.jp
NSns1.dns.ne.jp
A61.211.236.1🇯🇵 SAKURA-B61.211.236.0/24 (4/TOKYO) SAKURA Internet // EAST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan
PTRns1.dns.ne.jp
NSns2.dns.ne.jp
A133.167.21.1🇯🇵 SAKURA-C133.167.21.0/24 (OSAKA) SAKURA Internet // WEST JAPAN BACKBONE Grand Front Osaka Tower A 35F, 4-20 Ofukacho, Kita-ku, Osaka, Osaka 530-0011, Japan
PTRns2.dns.ne.jp
MXcloud21.jp ⭐
A153.120.3.184🇯🇵 SAKURA-A153.120.0.0/17 (2/ISHIKARI) SAKURA Internet // HOKKAIDO BACKBONE 1-8-14 Minami-Honmachi, Chuo-ku, Osaka 541-0054, Japan
PTRik1-204-75930.vs.sakura.ne.jp
SOAmaster.dns.ne.jptech@sakura.ad.jp 2026-05-09 #1

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=1784176202

MX for

cloud21.jp

Same first word

cloud21.net
cloud21.ie
cloud21.org
cloud21.nl
cloud21.jp
cloud21.co.uk
cloud21.eu
cloud21.de
cloud21.com

Similar names

21cloud.eu
12cloud.nl
21cloud.de
12cloud.net
21cloud.com
21cloud.cn
cloud12.ru
12cloud.de

DNS History

8 records (5 active, 3 former)

20162017201820192020202120222023202420252026NSmaster.dns.ne.jpns1.dns.ne.jpns2.dns.ne.jpns.cloud21.jpns4.sphere.ad.jpMXcloud21.jpA153.120.3.184203.138.100.132
●NSmaster.dns.ne.jp2026-04-01 → 2026-07-16 · 3 obs
○ 2017-11-24 14:20:12
● 2026-04-01 03:23:00
● 2026-07-16 04:50:14
○NSns.cloud21.jp2015-08-21 → 2017-11-24 · 4 obs
● 2015-08-21 11:28:02
● 2017-11-24 14:20:12
○ 2026-04-01 03:23:00
○ 2026-07-16 04:50:14
●NSns1.dns.ne.jp2026-04-01 → 2026-07-16 · 3 obs
○ 2017-11-24 14:20:12
● 2026-04-01 03:23:00
● 2026-07-16 04:50:14
●NSns2.dns.ne.jp2026-04-01 → 2026-07-16 · 3 obs
○ 2017-11-24 14:20:12
● 2026-04-01 03:23:00
● 2026-07-16 04:50:14
○NSns4.sphere.ad.jp2015-08-21 → 2017-11-24 · 4 obs
● 2015-08-21 11:28:02
● 2017-11-24 14:20:12
○ 2026-04-01 03:23:00
○ 2026-07-16 04:50:14
●MXcloud21.jp2015-08-21 → 2026-07-16 · 2 obs
● 2015-08-21 11:28:02
● 2026-07-16 04:50:14
●A153.120.3.1842026-04-01 → 2026-07-16 · 3 obs
○ 2017-11-24 14:20:12
● 2026-04-01 03:23:00
● 2026-07-16 04:50:14
○A203.138.100.1322015-08-21 → 2017-11-24 · 4 obs
● 2015-08-21 11:28:02
● 2017-11-24 14:20:12
○ 2026-04-01 03:23:00
○ 2026-07-16 04:50:14

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
jpa.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp...-
cloud21.jpns2.dns.ne.jp, ns1.dns.ne.jp2 records

✅ Authoritative Response

Server:61.211.236.1

NS records: ns2.dns.ne.jp, ns1.dns.ne.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for cloud21.jp (unsigned zone)

⏱️ Timing

Total: 1072ms | Queries: -

📄 Records

TypeCountSample Data
A1153.120.3.184
NS2ns1.dns.ne.jp, ns2.dns.ne.jp
MX1cloud21.jp (pri: 10)
SOA1master.dns.ne.jp tech.sakura.ad.jp

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns1.dns.ne.jp, ns2.dns.ne.jp)

Analysis

Mail Server Role

cloud21.jp serves as a mail server for cloud21.jp.

IP Addresses

cloud21.jp has exactly one IP address — 153.120.3.184.

Other host names, such as ik1-204-75930.vs.sakura.ne.jp, share IP numbers with cloud21.jp.

Name Servers

cloud21.jp is delegated to three name servers: master.dns.ne.jp, ns1.dns.ne.jp and ns2.dns.ne.jp.

At least some of cloud21.jp's name servers are shared with other domains, for example game105.sakura.ne.jp, hana-da.jp, tm-net.org and two more.

These name servers tend to be used in conjunction with the name servers dns.sakura.ad.jp.

master.dns.ne.jp, ns1.dns.ne.jp and ns2.dns.ne.jp each resolve to a single IP address: master.dns.ne.jp resolves to 210.224.172.18, ns1.dns.ne.jp resolves to 61.211.236.1 and ns2.dns.ne.jp resolves to 133.167.21.1.

Mail Servers

cloud21.jp uses exactly one mail server, which is cloud21.jp.

cloud21.jp resolves to a single IP number: 153.120.3.184.