jack.undo.jp - dns.ninja

jack.undo.jp

DNSSEC⚠️ Not signed
A202.181.97.40🇯🇵 SAKURA-B202.181.96.0/20 (6/TOKYO) SAKURA Internet // EAST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan
PTRwww230.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 ⚠️ Not in parent delegation
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 ⚠️ Not in parent delegation
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
MXjack.undo.jp ⭐
A202.181.97.40🇯🇵 SAKURA-B202.181.96.0/20 (6/TOKYO) SAKURA Internet // EAST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan
PTRwww230.sakura.ne.jp
SOAmaster.dns.ne.jptech@sakura.ad.jp 2013-04-23 #15

undo.jp

DNSSEC⚠️ Not signed
NSmaster.dns.ne.jp ⭐
NSns1.dns.ne.jp
NSns2.dns.ne.jp
SOAmaster.dns.ne.jptech@sakura.ad.jp 2026-05-01 #1
rank #141389 globally
rank #2696 in the tld
📈 Tranco rank: #321,511

MX for

jack.undo.jp

Same first word

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Similar names

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ckaj.com
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ckaj.org

DNS History

5 records (5 active, 0 former)

20162017201820192020202120222023202420252026NSmaster.dns.ne.jpns1.dns.ne.jpns2.dns.ne.jpMXjack.undo.jpA202.181.97.40
●NSmaster.dns.ne.jp2015-04-28 → 2026-07-14 · 2 obs
● 2015-04-28 13:31:16
● 2026-07-14 09:16:52
●NSns1.dns.ne.jp2015-04-28 → 2026-07-14 · 2 obs
● 2015-04-28 13:31:16
● 2026-07-14 09:16:52
●NSns2.dns.ne.jp2015-04-28 → 2026-07-14 · 2 obs
● 2015-04-28 13:31:16
● 2026-07-14 09:16:52
●MXjack.undo.jp2015-04-28 → 2026-07-14 · 2 obs
● 2015-04-28 13:31:16
● 2026-07-14 09:16:52
●A202.181.97.402015-04-28 → 2026-07-14 · 2 obs
● 2015-04-28 13:31:16
● 2026-07-14 09:16:52

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
jpa.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp...-
undo.jpns1.dns.ne.jp, ns2.dns.ne.jp2 records

✅ 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 undo.jp (unsigned zone)

⏱️ Timing

Total: 922ms | Queries: -

📄 Records

TypeCountSample Data
A1202.181.97.40
NS2ns1.dns.ne.jp, ns2.dns.ne.jp
MX1jack.undo.jp (pri: 10)
SOA1master.dns.ne.jp tech.sakura.ad.jp

📌 Glue Records Collected

Total: 2

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

Analysis

Mail Server Role

The MX record for jack.undo.jp points back to jack.undo.jp — it is its own mail server.

IP Addresses

jack.undo.jp directs to one IP number, which is 202.181.97.40.

Among the host names that share IP numbers with jack.undo.jp are pou.jp, netyu.com, bibo.sakura.ne.jp and two others.

Name Servers

DNS for jack.undo.jp is handled by three authoritative name servers: master.dns.ne.jp, ns1.dns.ne.jp and ns2.dns.ne.jp.

At least some of jack.undo.jp's name servers are shared with other domains, for example fdev.jp, kanko-aizu.com, sce-inc.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, ns1.dns.ne.jp and ns2.dns.ne.jp all have one IP address each — master.dns.ne.jp directs to 210.224.172.18, ns1.dns.ne.jp directs to 61.211.236.1 and ns2.dns.ne.jp directs to 133.167.21.1.

Mail Servers

The MX record for jack.undo.jp points to a single mail server: jack.undo.jp.

jack.undo.jp has exactly one IP number: 202.181.97.40.