oa-ryutsu.com - robtex.com

oa-ryutsu.com

DNSSEC⚠️ Not signed
A219.94.155.210🇯🇵 SAKURA-C219.94.128.0/17 (3/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan
PTRwww420b.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
MXoa-ryutsu.com ⭐
A219.94.155.210🇯🇵 SAKURA-C219.94.128.0/17 (3/OSAKA) SAKURA Internet // WEST JAPAN BACKBONE 1-8-15 Kyutaro-cho, Chuo Osaka 541-0056, Japan
PTRwww420b.sakura.ne.jp
TXTv=spf1 a:www420b.sakura.ne.jp mx ~all
SOAmaster.dns.ne.jptech@sakura.ad.jp 2025-05-21 #2

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=1774391212

MX for

oa-ryutsu.com

Subdomains

mail.oa-ryutsu.com

Same first word

oa-ryutsu.com

DNS History

16 records (5 active, 11 former)

2008201020122014201620182020202220242026NSmaster.dns.ne.jpns1.dns.ne.jpns2.dns.ne.jpdns001.crayfish.netdns002.crayfish.netns1.rsshserver.netns1.secure.netns2.rsshserver.netns2.secure.netMXoa-ryutsu.commail.oa-ryutsu.commx.oa-ryutsu.comA219.94.155.210120.29.191.95210.172.136.4211.13.196.156
○NSdns001.crayfish.net2007-11-01 → 2007-11-01 · 3 obs
● 2007-11-01 09:26:54
○ 2015-07-01 08:17:24
○ 2026-03-24 22:38:48
○NSdns002.crayfish.net2007-11-01 → 2007-11-01 · 3 obs
● 2007-11-01 09:26:54
○ 2015-07-01 08:17:24
○ 2026-03-24 22:38:48
●NSmaster.dns.ne.jp2026-03-24 → 2026-03-24 · 3 obs
○ 2016-11-17 08:20:04
● 2026-03-24 04:34:58
● 2026-03-24 22:38:48
●NSns1.dns.ne.jp2026-03-24 → 2026-03-24 · 3 obs
○ 2016-11-17 08:20:04
● 2026-03-24 04:34:58
● 2026-03-24 22:38:48
○NSns1.rsshserver.net2016-02-01 → 2016-11-17 · 5 obs
○ 2015-10-31 06:34:06
● 2016-02-01 04:41:22
● 2016-11-17 08:20:04
○ 2026-03-24 04:34:58
○ 2026-03-24 22:38:48
○NSns1.secure.net2015-07-01 → 2015-10-31 · 5 obs
○ 2007-11-01 09:26:54
● 2015-07-01 08:17:24
● 2015-10-31 06:34:06
○ 2016-02-01 04:41:22
○ 2026-03-24 22:38:48
●NSns2.dns.ne.jp2026-03-24 → 2026-03-24 · 3 obs
○ 2016-11-17 08:20:04
● 2026-03-24 04:34:58
● 2026-03-24 22:38:48
○NSns2.rsshserver.net2016-02-01 → 2016-11-17 · 5 obs
○ 2015-10-31 06:34:06
● 2016-02-01 04:41:22
● 2016-11-17 08:20:04
○ 2026-03-24 04:34:58
○ 2026-03-24 22:38:48
○NSns2.secure.net2015-07-01 → 2015-10-31 · 5 obs
○ 2007-11-01 09:26:54
● 2015-07-01 08:17:24
● 2015-10-31 06:34:06
○ 2016-02-01 04:41:22
○ 2026-03-24 22:38:48
○MXmail.oa-ryutsu.com2007-11-01 → 2007-11-01 · 3 obs
● 2007-11-01 09:26:54
○ 2015-07-01 08:17:24
○ 2026-03-24 22:38:48
○MXmx.oa-ryutsu.com2016-02-01 → 2016-11-17 · 5 obs
○ 2015-10-31 06:34:06
● 2016-02-01 04:41:22
● 2016-11-17 08:20:04
○ 2026-03-24 04:34:58
○ 2026-03-24 22:38:48
●MXoa-ryutsu.com2015-07-01 → 2026-03-24 · 7 obs
○ 2007-11-01 09:26:54
● 2015-07-01 08:17:24
● 2015-10-31 06:34:06
○ 2016-02-01 04:41:22
○ 2016-11-17 08:20:04
● 2026-03-24 04:34:58
● 2026-03-24 22:38:48
○A120.29.191.952015-07-01 → 2015-10-31 · 5 obs
○ 2007-11-01 09:26:54
● 2015-07-01 08:17:24
● 2015-10-31 06:34:06
○ 2016-02-01 04:41:22
○ 2026-03-24 22:38:48
○A210.172.136.42007-11-01 → 2007-11-01 · 3 obs
● 2007-11-01 09:26:54
○ 2015-07-01 08:17:24
○ 2026-03-24 22:38:48
○A211.13.196.1562016-02-01 → 2016-11-17 · 5 obs
○ 2015-10-31 06:34:06
● 2016-02-01 04:41:22
● 2016-11-17 08:20:04
○ 2026-03-24 04:34:58
○ 2026-03-24 22:38:48
●A219.94.155.2102026-03-24 → 2026-03-24 · 3 obs
○ 2016-11-17 08:20:04
● 2026-03-24 04:34:58
● 2026-03-24 22:38:48

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
coma.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...-
oa-ryutsu.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 oa-ryutsu.com (unsigned zone)

⏱️ Timing

Total: 1266ms | Queries: -

📄 Records

TypeCountSample Data
A1219.94.155.210
NS2ns2.dns.ne.jp, ns1.dns.ne.jp
MX1oa-ryutsu.com (pri: 10)
TXT1v=spf1 a:www420b.sakura.ne.jp mx ~all
SOA1master.dns.ne.jp tech.sakura.ad.jp

Analysis

Hierarchy

oa-ryutsu.com is a parent of mail.oa-ryutsu.com.

Mail Server Role

oa-ryutsu.com serves as the mail server for oa-ryutsu.com.

IP Addresses

oa-ryutsu.com points to a single IP address: 219.94.155.210.

Other host names such as www.hiroshima-parker.co.jp, jusglitty.com, kanridon.com, riakuro.sakura.ne.jp and mysm.jp share IP numbers with oa-ryutsu.com.

Name Servers

oa-ryutsu.com is delegated to three name servers: master.dns.ne.jp, ns1.dns.ne.jp and ns2.dns.ne.jp.

At least part of the name servers for oa-ryutsu.com are shared with other domains, for instance s-dengyou.com, cardex.jp, cretgp.com, futabaibaraki-intra.com and azumino-e-tabi.net.

These name servers are commonly used alongside the name servers dns.sakura.ad.jp.

Host names with a single IP:

master.dns.ne.jp points to: 210.224.172.18

ns1.dns.ne.jp points to: 61.211.236.1

ns2.dns.ne.jp points to: 133.167.21.1

Mail Servers

Mail for oa-ryutsu.com is handled by a single mail server, oa-ryutsu.com.

Host oa-ryutsu.com points to IP 219.94.155.210.