`a-class-m.com`

DNSSEC	⚠️ Not signed
A	35.73.72.214^{🇯🇵 Amazon35.72.0.0/13 EC2 NRT prefix}
		PTR	`ec2-35-73-72-214.ap-northeast-1.compute.amazonaws.com`
NS	`ns0.atw.jp` ⭐
		A	182.16.226.200^{🇯🇵 atworks182.16.224.0/21 A.T.WORKS,Inc. CIDR-block NO.2}
			PTR	`ns0.atw.jp`
NS	`ns.dlsv.com` ⚠️ Not in zone NS records
		A	210.236.247.71^{🇯🇵 IDC210.236.240.0/20 Frontier Inc.}
NS	`ns1.atw.jp` ⚠️ Not in parent delegation
		A	210.236.247.71^{🇯🇵 IDC210.236.240.0/20 Frontier Inc.}
NS	`ns2.atw.jp` ⚠️ Not in parent delegation
		A	219.99.220.242^{🇯🇵 NSK219.99.192.0/19 Co.,Ltd. 2-1,Minami-cho,Kanazawa-shi,Ishikawa,920-8769}
			PTR	`ns2.atw.jp`
NS	`ns2.dlsv.com` ⚠️ Not in zone NS records
		A	219.99.220.242^{🇯🇵 NSK219.99.192.0/19 Co.,Ltd. 2-1,Minami-cho,Kanazawa-shi,Ishikawa,920-8769}
			PTR	`ns2.atw.jp`
NS	`ns3.atw.jp` ⚠️ Not in parent delegation
		A	182.16.226.193^{🇯🇵 atworks182.16.224.0/21 A.T.WORKS,Inc. CIDR-block NO.2}
			PTR	`ns3.atw.jp`
NS	`ns3.dlsv.com` ⚠️ Not in zone NS records
		A	182.16.226.193^{🇯🇵 atworks182.16.224.0/21 A.T.WORKS,Inc. CIDR-block NO.2}
			PTR	`ns3.atw.jp`
MX	`smtp.a-class-m.com` ⭐
		A	182.16.226.148^{🇯🇵 atworks182.16.224.0/21 A.T.WORKS,Inc. CIDR-block NO.2}
			PTR	`onx07.atw.ne.jp`
TXT	`v=spf1 +ip4:182.16.226.148 ~all`
SOA	`ns0.atw.jp`hostmaster@atw.jp 2024-07-29 #1

`com`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.gtld-servers.net` ⭐
	NS	`b.gtld-servers.net`
	NS	`c.gtld-servers.net`
	NS	`d.gtld-servers.net`
	NS	`e.gtld-servers.net`
	NS	`f.gtld-servers.net`
	NS	`g.gtld-servers.net`
	NS	`h.gtld-servers.net`
	NS	`i.gtld-servers.net`
	NS	`j.gtld-servers.net`
	NS	`k.gtld-servers.net`
	NS	`l.gtld-servers.net`
	NS	`m.gtld-servers.net`
	SOA	`a.gtld-servers.net`nstld@verisign-grs.com serial=1776099092

Subdomains

smtp.a-class-m.com

Same first word

a-class-m.com

DNS History

10 records (9 active, 1 former)

●NSns.dlsv.com2015-08-04 → 2026-04-13 · 2 obs

● 2015-08-04 00:56:50
● 2026-04-13 17:14:28

●NSns0.atw.jp2026-03-07 → 2026-04-13 · 3 obs

○ 2015-08-04 00:56:50
● 2026-03-07 13:42:46
● 2026-04-13 17:14:28

●NSns1.atw.jp2026-03-07 → 2026-04-13 · 3 obs

○ 2015-08-04 00:56:50
● 2026-03-07 13:42:46
● 2026-04-13 17:14:28

●NSns2.atw.jp2026-03-07 → 2026-04-13 · 3 obs

○ 2015-08-04 00:56:50
● 2026-03-07 13:42:46
● 2026-04-13 17:14:28

●NSns2.dlsv.com2015-08-04 → 2026-04-13 · 2 obs

● 2015-08-04 00:56:50
● 2026-04-13 17:14:28

●NSns3.atw.jp2026-03-07 → 2026-04-13 · 3 obs

○ 2015-08-04 00:56:50
● 2026-03-07 13:42:46
● 2026-04-13 17:14:28

●NSns3.dlsv.com2015-08-04 → 2026-04-13 · 2 obs

● 2015-08-04 00:56:50
● 2026-04-13 17:14:28

●MXsmtp.a-class-m.com2015-08-04 → 2026-04-13 · 2 obs

● 2015-08-04 00:56:50
● 2026-04-13 17:14:28

○A210.129.186.1542015-08-04 → 2018-05-29 · 4 obs

● 2015-08-04 00:56:50
● 2018-05-29 07:25:04
○ 2026-03-07 13:42:46
○ 2026-04-13 17:14:28

●A35.73.72.2142026-03-07 → 2026-04-13 · 3 obs

○ 2018-05-29 07:25:04
● 2026-03-07 13:42:46
● 2026-04-13 17:14:28

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, b.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
a-class-m.com	ns3.dlsv.com, ns2.dlsv.com, ns.dlsv.com	3 records

✅ Authoritative Response

Server:219.99.220.242

NS records: ns3.dlsv.com, ns2.dlsv.com, ns.dlsv.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for a-class-m.com (unsigned zone)

⏱️ Timing

Total: 420ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`35.73.72.214`
NS	3	`ns3.atw.jp, ns1.atw.jp...`
MX	1	`smtp.a-class-m.com (pri: 10)`
TXT	1	`v=spf1 +ip4:182.16.226.148 ~all`
SOA	1	`ns0.atw.jp hostmaster.atw.jp`

📌 Glue Records Collected

Total: 3

Out-of-bailiwick: 3 (ns3.dlsv.com, ns2.dlsv.com, ns.dlsv.com)

Analysis

Hierarchy

smtp.a-class-m.com is a child of a-class-m.com.

IP Addresses

a-class-m.com resolves to one IP number: 35.73.72.214.

Other host names, for instance hoshin.co.jp, tokuabe.com, shinko-grp.com, ena-dc.jp and aisin-net.co.jp share IP numbers with a-class-m.com.

Name Servers

a-class-m.com is delegated to seven name servers: ns2.dlsv.com, ns3.dlsv.com, ns.dlsv.com, ns0.atw.jp, ns1.atw.jp, ns2.atw.jp and ns3.atw.jp.

a-class-m.com at least partially shares name servers with other domains, including nihon-maruko.jp, futabadies.co.jp, bossptr.com, horikiri.com and kts21c.com.