heartco.jp - robtex.com

heartco.jp

DNSSEC⚠️ Not signed
A210.154.227.245🇯🇵 OCN210.154.0.0/16 (AS4713) CIDR BLOCK 5 NTT Communications Corporation 1-1-6 Uchisaiwai-cho, Chiyoda-ku Tokyo 100-8019 JAPAN
PTRheartco.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
MXmwbgw1.ocn.ad.jp ⭐
A210.145.253.233🇯🇵 OCN210.145.0.0/16 (AS4713) CIDR BLOCK 18 NTT Communications Corporation 1-1-6 Uchisaiwai-cho, Chiyoda-ku Tokyo 100-8019 JAPAN
MXmwbgw2.ocn.ad.jp ⭐
A210.145.253.234🇯🇵 OCN210.145.0.0/16 (AS4713) CIDR BLOCK 18 NTT Communications Corporation 1-1-6 Uchisaiwai-cho, Chiyoda-ku Tokyo 100-8019 JAPAN
TXTv=spf1 a a:www3174.sakura.ne.jp mx include:_spf.bizmw.com ip4:203.137.176.194...
SOAmaster.dns.ne.jptech@sakura.ad.jp 2026-04-24 #1

jp

DNSSEC🔒 Signed (DS record present)
NSz.dns.jp ⭐
NSa.dns.jp
NSb.dns.jp
NSc.dns.jp
NSd.dns.jp
NSe.dns.jp
NSf.dns.jp
NSg.dns.jp
NSh.dns.jp
SOAz.dns.jproot@dns.jp serial=1777174202

PTR for

245.227.154.210.in-addr.arpa

Same first word

heartco.jp
heartco.ltd
heartco.net

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DNS History

14 records (6 active, 8 former)

20162017201820192020202120222023202420252026NSmaster.dns.ne.jpns1.dns.ne.jpns2.dns.ne.jpns-216.dns.jp-e1.cloudn-service.comns-217.dns.jp-w1.cloudn-service.comns-218.dns.us-e1.cloudn-service.comns1.secure.netns2.secure.netMXmwbgw1.ocn.ad.jpmwbgw2.ocn.ad.jpin.sjc.mx.trendmicro.comA210.154.227.245111.68.183.175125.206.173.121
●NSmaster.dns.ne.jp2026-04-10 → 2026-04-26 · 3 obs
○ 2016-09-04 02:49:08
● 2026-04-10 22:10:34
● 2026-04-26 03:50:48
○NSns-216.dns.jp-e1.cloudn-service.com2016-01-22 → 2016-09-04 · 5 obs
○ 2015-10-28 21:31:42
● 2016-01-22 09:29:14
● 2016-09-04 02:49:08
○ 2026-04-10 22:10:34
○ 2026-04-26 03:50:48
○NSns-217.dns.jp-w1.cloudn-service.com2016-01-22 → 2016-09-04 · 5 obs
○ 2015-10-28 21:31:42
● 2016-01-22 09:29:14
● 2016-09-04 02:49:08
○ 2026-04-10 22:10:34
○ 2026-04-26 03:50:48
○NSns-218.dns.us-e1.cloudn-service.com2016-01-22 → 2016-09-04 · 5 obs
○ 2015-10-28 21:31:42
● 2016-01-22 09:29:14
● 2016-09-04 02:49:08
○ 2026-04-10 22:10:34
○ 2026-04-26 03:50:48
●NSns1.dns.ne.jp2026-04-10 → 2026-04-26 · 3 obs
○ 2016-09-04 02:49:08
● 2026-04-10 22:10:34
● 2026-04-26 03:50:48
○NSns1.secure.net2015-05-17 → 2015-10-28 · 4 obs
● 2015-05-17 04:14:54
● 2015-10-28 21:31:42
○ 2016-01-22 09:29:14
○ 2026-04-26 03:50:48
●NSns2.dns.ne.jp2026-04-10 → 2026-04-26 · 3 obs
○ 2016-09-04 02:49:08
● 2026-04-10 22:10:34
● 2026-04-26 03:50:48
○NSns2.secure.net2015-05-17 → 2015-10-28 · 4 obs
● 2015-05-17 04:14:54
● 2015-10-28 21:31:42
○ 2016-01-22 09:29:14
○ 2026-04-26 03:50:48
○MXin.sjc.mx.trendmicro.com2015-05-17 → 2015-10-28 · 4 obs
● 2015-05-17 04:14:54
● 2015-10-28 21:31:42
○ 2016-01-22 09:29:14
○ 2026-04-26 03:50:48
●MXmwbgw1.ocn.ad.jp2016-01-22 → 2026-04-26 · 3 obs
○ 2015-10-28 21:31:42
● 2016-01-22 09:29:14
● 2026-04-26 03:50:48
●MXmwbgw2.ocn.ad.jp2016-01-22 → 2026-04-26 · 3 obs
○ 2015-10-28 21:31:42
● 2016-01-22 09:29:14
● 2026-04-26 03:50:48
○A111.68.183.1752015-05-17 → 2015-10-28 · 4 obs
● 2015-05-17 04:14:54
● 2015-10-28 21:31:42
○ 2016-01-22 09:29:14
○ 2026-04-26 03:50:48
○A125.206.173.1212016-01-22 → 2016-09-04 · 5 obs
○ 2015-10-28 21:31:42
● 2016-01-22 09:29:14
● 2016-09-04 02:49:08
○ 2026-04-10 22:10:34
○ 2026-04-26 03:50:48
●A210.154.227.2452026-04-10 → 2026-04-26 · 3 obs
○ 2016-09-04 02:49:08
● 2026-04-10 22:10:34
● 2026-04-26 03:50:48

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
jpa.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp...-
heartco.jpns2.dns.ne.jp, ns1.dns.ne.jp2 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 heartco.jp (unsigned zone)

⏱️ Timing

Total: 1028ms | Queries: -

📄 Records

TypeCountSample Data
A1210.154.227.245
NS2ns2.dns.ne.jp, ns1.dns.ne.jp
MX2mwbgw1.ocn.ad.jp (pri: 10), mwbgw2.ocn.ad.jp (pri: 10)
TXT1v=spf1 a a:www3174.sakura.ne.jp mx inclu
SOA1master.dns.ne.jp tech.sakura.ad.jp

📌 Glue Records Collected

Total: 2

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

Analysis

IP Addresses

heartco.jp points to a single IP address: 210.154.227.245.

Name Servers

heartco.jp 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 heartco.jp are shared with other domains, for instance chitose9.sakura.ne.jp, naminami.jp, 58.127.153.in-addr.arpa, oodesign.jp and laster.jp.

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

heartco.jp is handled by two mail servers: mwbgw1.ocn.ad.jp and mwbgw2.ocn.ad.jp.

heartco.jp uses the same mail server setup as other domains, for instance ejrs.co.jp, agile-corp.com, aquaworld-d1.com, hatanokousei.jp and to-haku.co.jp.

Hostnames with a single IP

mwbgw1.ocn.ad.jp resolves to: 210.145.253.233.

mwbgw2.ocn.ad.jp resolves to: 210.145.253.234.