rtdo.jp - dns.ninja

`rtdo.jp`

DNSSEC	⚠️ Not signed
A	133.167.8.28^{🇯🇵 SAKURA-C133.167.0.0/16 (OSAKA) SAKURA Internet // WEST JAPAN BACKBONE Grand Front Osaka Tower A 35F, 4-20 Ofukacho, Kita-ku, Osaka, Osaka 530-0011, Japan}
		PTR	`www5118.sakura.ne.jp`
NS	`master.dns.ne.jp` ⭐
		A	210.224.172.18^{🇯🇵 SAKURA-C210.224.160.0/19 (1/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan}
			PTR	`master.dns.ne.jp`
NS	`ns1.dns.ne.jp`
		A	61.211.236.1^{🇯🇵 SAKURA-B61.211.236.0/24 (4/TOKYO) SAKURA Internet // EAST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan}
			PTR	`ns1.dns.ne.jp`
NS	`ns2.dns.ne.jp`
		A	133.167.21.1^{🇯🇵 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}
			PTR	`ns2.dns.ne.jp`
MX	`rtdo.jp` ⭐
		A	133.167.8.28^{🇯🇵 SAKURA-C133.167.0.0/16 (OSAKA) SAKURA Internet // WEST JAPAN BACKBONE Grand Front Osaka Tower A 35F, 4-20 Ofukacho, Kita-ku, Osaka, Osaka 530-0011, Japan}
			PTR	`www5118.sakura.ne.jp`
TXT	`v=spf1 a:www5118.sakura.ne.jp mx ~all`
SOA	`master.dns.ne.jp`tech@sakura.ad.jp 2025-01-20 #18

`jp`

	DNSSEC	🔒 Signed (DS record present)
	NS	`z.dns.jp` ⭐
	NS	`a.dns.jp`
	NS	`b.dns.jp`
	NS	`c.dns.jp`
	NS	`d.dns.jp`
	NS	`e.dns.jp`
	NS	`f.dns.jp`
	NS	`g.dns.jp`
	NS	`h.dns.jp`
	SOA	`z.dns.jp`root@dns.jp serial=1783305902

MX for

rtdo.jp

Same first word

rtdo.com

rtdo.jp

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DNS History

8 records (5 active, 3 former)

●NSmaster.dns.ne.jp2026-02-26 → 2026-07-06 · 3 obs

○ 2018-09-27 02:34:34
● 2026-02-26 22:57:02
● 2026-07-06 02:49:08

●NSns1.dns.ne.jp2026-02-26 → 2026-07-06 · 3 obs

○ 2018-09-27 02:34:34
● 2026-02-26 22:57:02
● 2026-07-06 02:49:08

●NSns2.dns.ne.jp2026-02-26 → 2026-07-06 · 3 obs

○ 2018-09-27 02:34:34
● 2026-02-26 22:57:02
● 2026-07-06 02:49:08

○NSns2.joesdns.net2015-07-16 → 2018-09-27 · 4 obs

● 2015-07-16 19:00:58
● 2018-09-27 02:34:34
○ 2026-02-26 22:57:02
○ 2026-07-06 02:49:08

○NSns47.joesdns.net2015-07-16 → 2018-09-27 · 4 obs

● 2015-07-16 19:00:58
● 2018-09-27 02:34:34
○ 2026-02-26 22:57:02
○ 2026-07-06 02:49:08

●MXrtdo.jp2015-07-16 → 2026-07-06 · 2 obs

● 2015-07-16 19:00:58
● 2026-07-06 02:49:08

○A103.8.49.1002015-07-16 → 2018-09-27 · 4 obs

● 2015-07-16 19:00:58
● 2018-09-27 02:34:34
○ 2026-02-26 22:57:02
○ 2026-07-06 02:49:08

●A133.167.8.282026-02-26 → 2026-07-06 · 3 obs

○ 2018-09-27 02:34:34
● 2026-02-26 22:57:02
● 2026-07-06 02:49:08

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
jp	f.dns.jp, a.dns.jp, d.dns.jp, g.dns.jp...	-
rtdo.jp	ns2.dns.ne.jp, ns1.dns.ne.jp	2 records

✅ Authoritative Response

Server:133.167.21.1

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for rtdo.jp (unsigned zone)

⏱️ Timing

Total: 1060ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`133.167.8.28`
NS	2	`ns1.dns.ne.jp, ns2.dns.ne.jp`
MX	1	`rtdo.jp (pri: 10)`
TXT	1	`v=spf1 a:www5118.sakura.ne.jp mx ~all`
SOA	1	`master.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

rtdo.jp acts as its own mail server.

IP Addresses

rtdo.jp points to a single IP number: 133.167.8.28.

Additional host names — askgr.co.jp, behind-doors.com, medical-education.jp and two others — share IP numbers with rtdo.jp.

Name Servers

rtdo.jp has three name servers — master.dns.ne.jp, ns1.dns.ne.jp and ns2.dns.ne.jp.

At least some of rtdo.jp's name servers are shared with other domains, for example tenchi.ne.jp, bicycle.e-osusume.com, kitchenhime.com and two more.

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

Each of the three hostnames points to exactly one IP address: master.dns.ne.jp points to 210.224.172.18, ns1.dns.ne.jp points to 61.211.236.1 and ns2.dns.ne.jp points to 133.167.21.1.

Mail Servers

rtdo.jp has a single mail server: rtdo.jp itself.

rtdo.jp points to one IP number — 133.167.8.28.