21c.jp - robtex.com

21c.jp

DNSSEC⚠️ Not signed
A160.251.229.82🇯🇵 GMOOSK-NET160.251.229.0/24 GMO Internet,Inc Cerulean Tower, 11F Sakuragaokacho-26-1 Shibuya-ku, Tokyo 150-8512, Japan
PTRwww.gmoserver.jp
NSdns01.gmoserver.jp ⭐
A157.7.33.81🇯🇵 GMO-DNS157.7.33.0/24 GMO Internet,inc. Network-Team.
PTRdns01.gmoserver.jp
NSdns02.gmoserver.jp
A157.7.34.81🇯🇵 GMO-DNS157.7.34.0/24 GMO Internet,inc. Network-Team.
PTRdns02.gmoserver.jp
MXmx.21c.jp ⭐
A160.251.229.92🇯🇵 GMOOSK-NET160.251.229.0/24 GMO Internet,Inc Cerulean Tower, 11F Sakuragaokacho-26-1 Shibuya-ku, Tokyo 150-8512, Japan
PTRmx-06.gmoserver.jp
TXTv=spf1 include:spf.gmoserver.jp ~all
SOAdns01.gmoserver.jphostmaster@21c.jp 2016-07-29 #2

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=1773558003

Subdomains

mx.21c.jp

Same first word

21c.or.kr
21c.net
21c.nl
21c.us
21c.xin
21c.cn
21c.me
21c.ru
21c.co.jp
21c.it
21c.com
21c.org
21c.jp
21c.community
21c.biz
21c.or.jp
21c.tc
21c.ca
21c.online
21c.pl
21c.de
21c.email
21c.co.uk

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12c.cz
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1c2.me
c21.si
1c2.com.cn
c12.com
c21.at
c21.ir
c12.kr
c12.nl
c21.online
1c2.net
c21.mx
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12c.in
c21.name
12c.nl
c21.ca
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12c.org
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c21.com.tr

DNS History

5 records (4 active, 1 former)

20162017201820192020202120222023202420252026NSdns01.gmoserver.jpdns02.gmoserver.jpMXmx.21c.jpA160.251.229.82157.7.144.5
●NSdns01.gmoserver.jp2015-08-10 → 2026-03-16 · 2 obs
● 2015-08-10 04:07:42
● 2026-03-16 10:29:48
●NSdns02.gmoserver.jp2015-08-10 → 2026-03-16 · 2 obs
● 2015-08-10 04:07:42
● 2026-03-16 10:29:48
●MXmx.21c.jp2015-08-10 → 2026-03-16 · 2 obs
● 2015-08-10 04:07:42
● 2026-03-16 10:29:48
○A157.7.144.52015-08-10 → 2016-12-21 · 4 obs
● 2015-08-10 04:07:42
● 2016-12-21 15:34:30
○ 2026-03-05 09:22:34
○ 2026-03-16 10:29:48
●A160.251.229.822026-03-05 → 2026-03-16 · 3 obs
○ 2016-12-21 15:34:30
● 2026-03-05 09:22:34
● 2026-03-16 10:29:48

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
jpa.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp...-
21c.jpdns01.gmoserver.jp, dns02.gmoserver.jp-

✅ Authoritative Response

Server: 157.7.33.81

NS records: dns01.gmoserver.jp, dns02.gmoserver.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for 21c.jp (unsigned zone)

⏱️ Timing

Total: 1805ms | Queries: -

📄 Records

TypeCountSample Data
A1160.251.229.82
NS2dns01.gmoserver.jp, dns02.gmoserver.jp
MX1mx.21c.jp (pri: 10)
TXT1v=spf1 include:spf.gmoserver.jp ~all
SOA1dns01.gmoserver.jp hostmaster.21c.jp

Analysis

Hierarchy

The parent of mx.21c.jp is 21c.jp.

IP Addresses

21c.jp points to a single IP address: 160.251.229.82.

Other host names such as xn--tlq46te6ebvg9k5atx5a.com, tanakasangyou.co.jp, mr21.com, office-kurachi.com and fkoh.jp share IPs with 21c.jp.

Name Servers

Two name servers dns01.gmoserver.jp and dns02.gmoserver.jp handle the delegation for 21c.jp.

21c.jp shares the same name server setup as other domains, for example orz-style.com, gramov.com, alumer.net, populustec.com and keica.com.

21c.jp partially shares name servers with other domains, for example sys21-03.org and trust-f.net.

Host names with one IP number:

dns01.gmoserver.jp points to 157.7.33.81; dns02.gmoserver.jp points to 157.7.34.81.

Mail Servers

The mx.21c.jp mail server handles 21c.jp.

mx.21c.jp points to a single IP number: 160.251.229.92.