`corebuilder.co.jp`

DNSSEC	⚠️ Not signed
A	60.43.214.203^{🇯🇵 OCN60.32.0.0/12 (AS4713) CIDR BLOCK 70 NTT Communications Corporation 1-1-6 Uchisaiwai-cho, Chiyoda-ku Tokyo 100-8019 JAPAN}
		PTR	`corebuilder.co.jp`
NS	`mwns1.customer.ne.jp` ⭐
		A	210.150.23.210^{🇯🇵 InfoSphere210.150.0.0/16 INFOSPHERE}
NS	`mwns2.customer.ne.jp`
		A	202.17.152.183^{🇯🇵 InfoSphere202.17.128.0/19 INFOSPHERE}
MX	`mwbgw1.ocn.ad.jp` ⭐
		A	210.145.253.233^{🇯🇵 OCN210.145.0.0/16 (AS4713) CIDR BLOCK 18 NTT Communications Corporation 1-1-6 Uchisaiwai-cho, Chiyoda-ku Tokyo 100-8019 JAPAN}
MX	`mwbgw2.ocn.ad.jp` ⭐
		A	210.145.253.234^{🇯🇵 OCN210.145.0.0/16 (AS4713) CIDR BLOCK 18 NTT Communications Corporation 1-1-6 Uchisaiwai-cho, Chiyoda-ku Tokyo 100-8019 JAPAN}
TXT	`v=spf1 a include:_spf.bizmw.com ~all`
SOA	`mwns1.customer.ne.jp`host-plan-ac@ntt.com serial=1613955533

`co.jp`

	DNSSEC	⚠️ Not signed
	TXT	`co.jp.`

WOT: SAFE (58/100)

PTR for

203.214.43.60.in-addr.arpa

Same first word

corebuilder.info

corebuilder.co.jp

corebuilder.com

Similar names

cleuberodri.blogspot.com

cloudberrie.io

cloudberrie.app

DNS History

13 records (5 active, 8 former)

●NSmwns1.customer.ne.jp2026-04-13 → 2026-04-13 · 2 obs

○ 2017-10-29 16:15:04
● 2026-04-13 05:55:38

●NSmwns2.customer.ne.jp2026-04-13 → 2026-04-13 · 2 obs

○ 2017-10-29 16:15:04
● 2026-04-13 05:55:38

○NSns-207.dns.jp-e1.cloudn-service.com2016-03-06 → 2017-10-29 · 4 obs

○ 2015-11-21 13:59:20
● 2016-03-06 21:10:18
● 2017-10-29 16:15:04
○ 2026-04-13 05:55:38

○NSns-208.dns.jp-w1.cloudn-service.com2016-03-06 → 2017-10-29 · 4 obs

○ 2015-11-21 13:59:20
● 2016-03-06 21:10:18
● 2017-10-29 16:15:04
○ 2026-04-13 05:55:38

○NSns-209.dns.us-e1.cloudn-service.com2016-03-06 → 2017-10-29 · 4 obs

○ 2015-11-21 13:59:20
● 2016-03-06 21:10:18
● 2017-10-29 16:15:04
○ 2026-04-13 05:55:38

○NSns1.secure.net2015-07-22 → 2015-11-21 · 4 obs

● 2015-07-22 08:32:02
● 2015-11-21 13:59:20
○ 2016-03-06 21:10:18
○ 2026-04-13 05:55:38

○NSns2.secure.net2015-07-22 → 2015-11-21 · 4 obs

● 2015-07-22 08:32:02
● 2015-11-21 13:59:20
○ 2016-03-06 21:10:18
○ 2026-04-13 05:55:38

○MXin.sjc.mx.trendmicro.com2015-07-22 → 2015-07-22 · 3 obs

● 2015-07-22 08:32:02
○ 2015-11-21 13:59:20
○ 2026-04-13 05:55:38

●MXmwbgw1.ocn.ad.jp2015-11-21 → 2026-04-13 · 3 obs

○ 2015-07-22 08:32:02
● 2015-11-21 13:59:20
● 2026-04-13 05:55:38

●MXmwbgw2.ocn.ad.jp2015-11-21 → 2026-04-13 · 3 obs

○ 2015-07-22 08:32:02
● 2015-11-21 13:59:20
● 2026-04-13 05:55:38

○A27.50.117.1942015-07-22 → 2015-07-22 · 3 obs

● 2015-07-22 08:32:02
○ 2015-11-21 13:59:20
○ 2026-04-13 05:55:38

●A60.43.214.2032026-04-13 → 2026-04-13 · 2 obs

○ 2017-10-29 16:15:04
● 2026-04-13 05:55:38

○A61.112.31.1752015-11-21 → 2017-10-29 · 4 obs

○ 2015-07-22 08:32:02
● 2015-11-21 13:59:20
● 2017-10-29 16:15:04
○ 2026-04-13 05:55:38

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
jp	g.dns.jp, h.dns.jp, e.dns.jp, f.dns.jp...	-
corebuilder.co.jp	mwns2.customer.ne.jp, mwns1.customer.ne.jp	-

✅ Authoritative Response

Server:210.150.23.210

NS records: mwns2.customer.ne.jp, mwns1.customer.ne.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for corebuilder.co.jp (unsigned zone)

⏱️ Timing

Total: 1633ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`60.43.214.203`
NS	2	`mwns1.customer.ne.jp, mwns2.customer.ne.jp`
MX	2	`mwbgw1.ocn.ad.jp (pri: 10), mwbgw2.ocn.ad.jp (pri: 10)`
TXT	1	`v=spf1 a include:_spf.bizmw.com ~all`
SOA	1	`mwns1.customer.ne.jp host-plan-ac.ntt.co`

Analysis

IP Addresses

corebuilder.co.jp maps to IP address 60.43.214.203.

Name Servers

Two name servers mwns1.customer.ne.jp and mwns2.customer.ne.jp are delegated to corebuilder.co.jp.

corebuilder.co.jp uses the same name server configuration as other domains, such as takyusoft.jimusho.jp, kansai-automation.co.jp, qdts.co.jp, tohnai.com and hiroshima-mm.jp.

Host names with a single IP address:

mwns1.customer.ne.jp points to 210.150.23.210

mwns2.customer.ne.jp points to 202.17.152.183

Mail Servers

Two mail servers handle corebuilder.co.jp: mwbgw1.ocn.ad.jp and mwbgw2.ocn.ad.jp.

corebuilder.co.jp shares the same mail server setup as other domains, including sakura-con.co.jp, senshinsya.co.jp, rvka.net, kitasige.co.jp and fukuyo.co.jp.

corebuilder.co.jp shares some mail servers with other domains, at least partially, for instance yuai.or.jp.

Host names with a single IP address:

mwbgw1.ocn.ad.jp points to 210.145.253.233

mwbgw2.ocn.ad.jp points to 210.145.253.234

corebuilder.co.jp - robtex.com