`mail.coretech-ex.com`

	DNSSEC	⚠️ Not signed
	A	210.175.230.204^{🇯🇵 FRT-AS-18074210.175.224.0/20 FRT-IDC}

`coretech-ex.com`

	DNSSEC	⚠️ Not signed
	NS	`dns1.ys-net.ne.jp` ⭐
	NS	`dns2.ys-net.ne.jp`
	MX	`mail.coretech-ex.com` ⭐
	TXT	`v=spf1 mx ~all`
	SOA	`dns1.ys-net.ne.jp`webmaster@ys-net.ne.jp serial=2008000010

MX for

coretech-ex.com

Same first word

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DNS History

3 records (1 active, 2 former)

○A106.186.75.202015-06-01 → 2016-04-09 · 5 obs

○ 2008-03-14 19:13:42
● 2015-06-01 12:07:26
● 2016-04-09 05:51:54
○ 2026-02-17 00:54:50
○ 2026-07-31 16:56:10

●A210.175.230.2042026-02-17 → 2026-07-31 · 3 obs

○ 2016-04-09 05:51:54
● 2026-02-17 00:54:50
● 2026-07-31 16:56:10

○A64.56.177.1202008-03-14 → 2008-03-14 · 3 obs

● 2008-03-14 19:13:42
○ 2015-06-01 12:07:26
○ 2026-07-31 16:56:10

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
coretech-ex.com	dns1.ys-net.ne.jp, dns2.ys-net.ne.jp	-

✅ Authoritative Response

Server:118.67.93.17

NS records: dns1.ys-net.ne.jp, dns2.ys-net.ne.jp

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for coretech-ex.com (unsigned zone)

⏱️ Timing

Total: 1441ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`210.175.230.204`

Analysis

Mail Server Role

mail.coretech-ex.com is a mail server for coretech-ex.com.

IP Addresses

mail.coretech-ex.com directs to one IP number, which is 210.175.230.204.

Among the host names that share IP numbers with mail.coretech-ex.com are mail.tachikawaaoiro.com, eset.stealthone.jp, mail.kanezyu.com and two others.

mail.coretech-ex.com - robtex.com