mail.sei-plus.com - dns.ninja

mail.sei-plus.com

CNAMEsei-plus.com
DNSSEC⚠️ Not signed
A219.94.163.208🇯🇵 SAKURA-C219.94.128.0/17 (3/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan
PTRwww1568.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
MXsei-plus.com ⭐
A219.94.163.208🇯🇵 SAKURA-C219.94.128.0/17 (3/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan
PTRwww1568.sakura.ne.jp
TXTv=spf1 a:www1568.sakura.ne.jp mx ~all
SOAmaster.dns.ne.jptech@sakura.ad.jp 2025-09-24 #3

sei-plus.com

DNSSEC⚠️ Not signed
A219.94.163.208🇯🇵 SAKURA-C219.94.128.0/17 (3/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan
NSmaster.dns.ne.jp ⭐
NSns1.dns.ne.jp
NSns2.dns.ne.jp
MXsei-plus.com ⭐
TXTv=spf1 a:www1568.sakura.ne.jp mx ~all
SOAmaster.dns.ne.jptech@sakura.ad.jp 2025-09-24 #3

Previously MX for

sei-plus.com

Same first word

mail.cool
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DNS History

2 records (1 active, 1 former)

20162017201820192020202120222023202420252026A121.50.47.193CNAMEsei-plus.com
○A121.50.47.1932015-06-07 → 2016-04-25 · 4 obs
● 2015-06-07 06:08:30
● 2016-04-25 23:08:18
○ 2026-08-14 04:08:08
○ 2026-08-14 04:08:10
●CNAMEsei-plus.com2026-08-14 → 2026-08-14 · 2 obs
● 2026-08-14 04:08:08
● 2026-08-14 04:08:10

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
sei-plus.comns1.dns.ne.jp, ns2.dns.ne.jp-

✅ Authoritative Response

Server:133.167.21.1

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

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

⏱️ Timing

Total: 909ms | Queries: -

📄 Records

TypeCountSample Data
CNAME1sei-plus.com

Analysis

IP Addresses

mail.sei-plus.com directs to one IP number, which is 219.94.163.208.

Among the host names that share IP numbers with mail.sei-plus.com are medicare-i.com, shaunkyo.jp, sumaisc.com and two others.

Name Servers

mail.sei-plus.com is served by three name servers: master.dns.ne.jp, ns1.dns.ne.jp and ns2.dns.ne.jp.

At least some of mail.sei-plus.com's name servers are shared with other domains, for example gigastream.nagaoka.niigata.jp, kyoshin815.sakura.ne.jp, baikanen.jp and two more.

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

master.dns.ne.jp has IP address 210.224.172.18, ns1.dns.ne.jp has IP address 61.211.236.1 and ns2.dns.ne.jp has IP address 133.167.21.1 — one address each.

Mail Servers

mail.sei-plus.com routes its mail through a single mail server, sei-plus.com.

mail.sei-plus.com and domains like sei-plus.com share an identical mail server configuration.

sei-plus.com resolves to 219.94.163.208 and no other IP number.