sei-ko.com - dns.ninja

sei-ko.com

DNSSEC⚠️ Not signed
A52.69.55.235🇯🇵 Amazon52.68.0.0/15 EC2 NRT prefix
NSdns01.muumuu-domain.com ⭐
A202.239.23.39🇯🇵 IDC202.239.23.0/24 Frontier Inc.
NSdns02.muumuu-domain.com
A160.251.249.62🇯🇵 GMOOSK-NET160.251.128.0/17 GMO Internet,Inc Cerulean Tower, 11F Sakuragaokacho-26-1 Shibuya-ku, Tokyo 150-8512, Japan
MXsei-kocom.sakura.ne.jp ⭐
TXTv=spf1 a:wwwsei-kocom.sakura.ne.jp mx include:_spf.google.com ~all
SOAdns01.muumuu-domain.compostmaster@sei-ko.com serial=1706006619

com

DNSSEC🔒 Signed (DS record present)
NSa.gtld-servers.net ⭐
NSb.gtld-servers.net
NSc.gtld-servers.net
NSd.gtld-servers.net
NSe.gtld-servers.net
NSf.gtld-servers.net
NSg.gtld-servers.net
NSh.gtld-servers.net
NSi.gtld-servers.net
NSj.gtld-servers.net
NSk.gtld-servers.net
NSl.gtld-servers.net
NSm.gtld-servers.net
SOAa.gtld-servers.netnstld@verisign-grs.com serial=1782554735

Previously MX for

sei-ko.com

Same first word

sei-ko.com

Similar names

koei-s.com
sike-o.com
o-seki.co.jp
ko-sei.co.jp
sei-ok.com
ko-sei.biz
seio-k.com
e-siko.de
s-koei.com
koei-s.co.jp
kei-so.co.jp
e-kiso.jp
esi-ko.com
ko-sei.com
ok-ise.com
so-kei.net
eks-io.com
so-kei.jp
iko-se.com
eiko-s.com
o-keis.net
e-kios.com
kei-so.com
e-siko.pl

DNS History

16 records (4 active, 12 former)

20162017201820192020202120222023202420252026NSdns01.muumuu-domain.comdns02.muumuu-domain.comns.kagoya.netns0.kagoya.netns1.clsvrsystems.netns1.kagoya.netns1.secure.netns2.clsvrsystems.netns2.secure.netMXsei-kocom.sakura.ne.jpdmail.kagoya.netsei-ko.comA52.69.55.235153.122.130.138153.127.229.79204.227.187.238
●NSdns01.muumuu-domain.com2026-02-19 → 2026-06-27 · 3 obs
○ 2017-11-13 10:46:06
● 2026-02-19 17:14:58
● 2026-06-27 10:19:50
●NSdns02.muumuu-domain.com2026-02-19 → 2026-06-27 · 3 obs
○ 2017-11-13 10:46:06
● 2026-02-19 17:14:58
● 2026-06-27 10:19:50
○NSns.kagoya.net2016-01-12 → 2017-11-13 · 5 obs
○ 2015-11-07 19:05:22
● 2016-01-12 20:54:00
● 2017-11-13 10:46:06
○ 2026-02-19 17:14:58
○ 2026-06-27 10:19:50
○NSns0.kagoya.net2016-01-12 → 2017-11-13 · 5 obs
○ 2015-11-07 19:05:22
● 2016-01-12 20:54:00
● 2017-11-13 10:46:06
○ 2026-02-19 17:14:58
○ 2026-06-27 10:19:50
○NSns1.clsvrsystems.net2015-11-07 → 2015-11-07 · 4 obs
○ 2015-09-19 20:21:40
● 2015-11-07 19:05:22
○ 2016-01-12 20:54:00
○ 2026-06-27 10:19:50
○NSns1.kagoya.net2016-01-12 → 2017-11-13 · 5 obs
○ 2015-11-07 19:05:22
● 2016-01-12 20:54:00
● 2017-11-13 10:46:06
○ 2026-02-19 17:14:58
○ 2026-06-27 10:19:50
○NSns1.secure.net2015-08-02 → 2015-09-19 · 4 obs
● 2015-08-02 05:43:18
● 2015-09-19 20:21:40
○ 2015-11-07 19:05:22
○ 2026-06-27 10:19:50
○NSns2.clsvrsystems.net2015-11-07 → 2015-11-07 · 4 obs
○ 2015-09-19 20:21:40
● 2015-11-07 19:05:22
○ 2016-01-12 20:54:00
○ 2026-06-27 10:19:50
○NSns2.secure.net2015-08-02 → 2015-09-19 · 4 obs
● 2015-08-02 05:43:18
● 2015-09-19 20:21:40
○ 2015-11-07 19:05:22
○ 2026-06-27 10:19:50
○MXdmail.kagoya.net2016-01-12 → 2017-11-13 · 5 obs
○ 2015-11-07 19:05:22
● 2016-01-12 20:54:00
● 2017-11-13 10:46:06
○ 2026-02-19 17:14:58
○ 2026-06-27 10:19:50
○MXsei-ko.com2015-08-02 → 2015-11-07 · 4 obs
● 2015-08-02 05:43:18
● 2015-11-07 19:05:22
○ 2016-01-12 20:54:00
○ 2026-06-27 10:19:50
●MXsei-kocom.sakura.ne.jp2026-02-19 → 2026-06-27 · 3 obs
○ 2017-11-13 10:46:06
● 2026-02-19 17:14:58
● 2026-06-27 10:19:50
○A153.122.130.1382015-11-07 → 2015-11-07 · 4 obs
○ 2015-09-19 20:21:40
● 2015-11-07 19:05:22
○ 2016-01-12 20:54:00
○ 2026-06-27 10:19:50
○A153.127.229.792016-01-12 → 2017-11-13 · 5 obs
○ 2015-11-07 19:05:22
● 2016-01-12 20:54:00
● 2017-11-13 10:46:06
○ 2026-02-19 17:14:58
○ 2026-06-27 10:19:50
○A204.227.187.2382015-08-02 → 2015-09-19 · 4 obs
● 2015-08-02 05:43:18
● 2015-09-19 20:21:40
○ 2015-11-07 19:05:22
○ 2026-06-27 10:19:50
●A52.69.55.2352026-02-19 → 2026-06-27 · 3 obs
○ 2017-11-13 10:46:06
● 2026-02-19 17:14:58
● 2026-06-27 10:19:50

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
comg.gtld-servers.net, h.gtld-servers.net, b.gtld-servers.net, d.gtld-servers.net...-
sei-ko.comdns01.muumuu-domain.com, dns02.muumuu-domain.com2 records

✅ Authoritative Response

Server:202.239.23.39

NS records: dns01.muumuu-domain.com, dns02.muumuu-domain.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for sei-ko.com (unsigned zone)

⏱️ Timing

Total: 2777ms | Queries: -

📄 Records

TypeCountSample Data
A152.69.55.235
NS2dns01.muumuu-domain.com, dns02.muumuu-domain.com
MX1sei-kocom.sakura.ne.jp (pri: 10)
TXT1v=spf1 a:wwwsei-kocom.sakura.ne.jp mx in
SOA1dns01.muumuu-domain.com postmaster.sei-k

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (dns01.muumuu-domain.com, dns02.muumuu-domain.com)

Analysis

IP Addresses

sei-ko.com has exactly one IP address — 52.69.55.235.

oralhealth.jp, hirodenservice.co.jp, iekoubosenga.com plus two other host names have IP numbers in common with sei-ko.com.

Name Servers

sei-ko.com is served by two delegated name servers, dns01.muumuu-domain.com and dns02.muumuu-domain.com.

The name server configuration of sei-ko.com is shared with other domains, for instance hippopotamus-cabaret.com, shodou-design-kouen.com, tera-ns.com and two others.

The name servers of sei-ko.com overlap at least partially with those of other domains — among them bloom-corp.com, kaken.tv, bc-j.com and two more.

Both dns01.muumuu-domain.com and dns02.muumuu-domain.com have a single IP address each — dns01.muumuu-domain.com resolves to 202.239.23.39 while dns02.muumuu-domain.com resolves to 160.251.249.62.

Mail Servers

sei-ko.com uses one mail server — sei-kocom.sakura.ne.jp.