`optech.jp`

DNSSEC	⚠️ Not signed
A	202.172.28.112^{🇯🇵 DRNET202.172.24.0/21}
		PTR	`s111.coreserver.jp`
NS	`ns1.value-domain.com` ⭐
		A	172.64.52.38^{🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`ns2.value-domain.com`
		A	172.64.53.3^{🇺🇸 Cloudflare172.64.53.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`ns3.value-domain.com` ⚠️ Not in zone NS records
		A	172.64.52.38^{🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`ns4.value-domain.com` ⚠️ Not in zone NS records
		A	172.64.53.3^{🇺🇸 Cloudflare172.64.53.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
NS	`ns5.value-domain.com` ⚠️ Not in zone NS records
		A	172.64.52.38^{🇺🇸 Cloudflare172.64.52.0/24 , Inc. 101 Townsend Street, San Francisco, California 94107, US}
MX	`optech.jp` ⭐
		A	202.172.28.112^{🇯🇵 DRNET202.172.24.0/21}
			PTR	`s111.coreserver.jp`
TXT	`pardot1067313=9a93a85bfc6daa95194cfef3a25e771ca04f30ebcbd446178f2e299a83eaef7d`
TXT	`sending_domain1067313=dd27465f128048b618df6148e2dc50d3b0f44bebc1ee3002c55a2e7...`
TXT	`v=spf1 ip4:202.172.28.112 ~all`
SOA	`ns1.value-domain.com`hostmaster@optech.jp 2024-05-23 #17

`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=1782869403

MX for

optech.jp

Same first word

optech.cz

optech.life

optech.vn

optech.jp

optech.it

optech.pl

optech.com

optech.eu

optech.ca

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optech.info

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optech.org

optech.com.cn

optech.gr

optech.io

optech.by

optech.de

optech.com.br

optech.net

optech.com.mx

optech.on.ca

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DNS History

7 records (7 active, 0 former)

●NSns1.value-domain.com2015-07-08 → 2026-07-01 · 2 obs

● 2015-07-08 13:44:22
● 2026-07-01 02:06:00

●NSns2.value-domain.com2015-07-08 → 2026-07-01 · 2 obs

● 2015-07-08 13:44:22
● 2026-07-01 02:06:00

●NSns3.value-domain.com2026-06-18 → 2026-07-01 · 3 obs

○ 2015-07-08 13:44:22
● 2026-06-18 12:13:46
● 2026-07-01 02:06:00

●NSns4.value-domain.com2026-06-18 → 2026-07-01 · 3 obs

○ 2015-07-08 13:44:22
● 2026-06-18 12:13:46
● 2026-07-01 02:06:00

●NSns5.value-domain.com2026-06-18 → 2026-07-01 · 3 obs

○ 2015-07-08 13:44:22
● 2026-06-18 12:13:46
● 2026-07-01 02:06:00

●MXoptech.jp2015-07-08 → 2026-07-01 · 2 obs

● 2015-07-08 13:44:22
● 2026-07-01 02:06:00

●A202.172.28.1122015-07-08 → 2026-07-01 · 2 obs

● 2015-07-08 13:44:22
● 2026-07-01 02:06:00

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
jp	a.dns.jp, b.dns.jp, c.dns.jp, d.dns.jp...	-
optech.jp	ns2.value-domain.com, ns3.value-domain.com, ns4.value-domain.com, ns5.value-domain.com...	-

✅ Authoritative Response

Server:172.64.53.3

NS records: ns2.value-domain.com, ns3.value-domain.com, ns4.value-domain.com, ns5.value-domain.com, ns1.value-domain.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for optech.jp (unsigned zone)

⏱️ Timing

Total: 1067ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`202.172.28.112`
NS	2	`ns1.value-domain.com, ns2.value-domain.com`
MX	1	`optech.jp (pri: 10)`
TXT	3	`sending_domain1067313=dd27465f128048b618, v=spf1 ip4:202.172.28.112 ~all...`
SOA	1	`ns1.value-domain.com hostmaster.optech.j`

Analysis

Mail Server Role

optech.jp acts as its own mail server.

IP Addresses

optech.jp points to a single IP number: 202.172.28.112.

Additional host names — mx.tsujiyosoten.co.jp, takumihome.net, taka.com and two others — share IP numbers with optech.jp.

Name Servers

Delegation for optech.jp is to five name servers: ns1.value-domain.com, ns2.value-domain.com, ns3.value-domain.com and two others.

optech.jp has at least partial name server overlap with other domains, such as standup-tyozai.net, oppai.name, applicationdevsoc.com and two others.

These name servers are frequently paired with the name servers ns4.value-domain.com, ns5.value-domain.com, ns11.value-domain.com and two others.

Host names pointing to a single IP address:

The hostname ns1.value-domain.com resolves to 172.64.52.38.

The hostname ns2.value-domain.com resolves to 172.64.53.3.

The hostname ns3.value-domain.com resolves to 172.64.52.38.

The hostname ns4.value-domain.com resolves to 172.64.53.3.

The hostname ns5.value-domain.com resolves to 172.64.52.38.

ns1.value-domain.com, ns3.value-domain.com and ns5.value-domain.com are host names that all point to 172.64.52.38.

ns2.value-domain.com along with ns4.value-domain.com each resolve to 172.64.53.3 IP addresses.