`lessonmanager.com`

DNSSEC	⚠️ Not signed
A	2602:fd9e:1::21^{🇺🇸 HOSTROUND-LLC2602:fd9e::/40}
A	23.145.80.21^{🇺🇸 HOSTROUND-LLC23.145.80.0/24 HostRound LLC 400 S Akard St. STE 200 Dallas TX 75202 United States www.HostRound.com}
NS	`ns1.hostround.com` ⭐
		A	45.77.111.166^{🇺🇸 AS-VULTR45.77.96.0/20 Vultr Assigned Prefix}
			PTR	`us-ns.hostround.com`
NS	`ns2.hostround.com`
		A	192.25.14.90^{🇳🇱 HOSTROUND-LLC192.25.14.0/24 www.HostRound.com}
			PTR	`90-14-25-192.hostround.com`
NS	`ns3.hostround.com` ⚠️ Not in parent delegation
		A	23.145.80.40^{🇺🇸 HOSTROUND-LLC23.145.80.0/24 HostRound LLC 400 S Akard St. STE 200 Dallas TX 75202 United States www.HostRound.com}
			PTR	`40-80-145-23.hostround.com`
MX	`lessonmanager.com` ⭐
		A	2602:fd9e:1::21^{🇺🇸 HOSTROUND-LLC2602:fd9e::/40}
		A	23.145.80.21^{🇺🇸 HOSTROUND-LLC23.145.80.0/24 HostRound LLC 400 S Akard St. STE 200 Dallas TX 75202 United States www.HostRound.com}
			PTR	`mail-us110.hostround.com`
TXT	`v=spf1 +a +mx +ip4:207.244.110.43 +include:spf.antispamcloud.com ~all`
SOA	`ns1.hostround.com`ap@walkingbass.com 2026-03-22 #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=1774759492

MX for

lessonmanager.com

Same first word

lessonmanager.com

DNS History

9 records (6 active, 3 former)

●NSns1.hostround.com2026-02-17 → 2026-03-29 · 3 obs

○ 2017-02-08 15:46:02
● 2026-02-17 13:14:16
● 2026-03-29 05:11:58

○NSns1.leadingtonemedia.com2015-06-24 → 2017-02-08 · 5 obs

○ 2008-03-17 20:12:18
● 2015-06-24 08:10:48
● 2017-02-08 15:46:02
○ 2026-02-17 13:14:16
○ 2026-03-29 05:11:58

●NSns2.hostround.com2026-02-17 → 2026-03-29 · 3 obs

○ 2017-02-08 15:46:02
● 2026-02-17 13:14:16
● 2026-03-29 05:11:58

○NSns2.leadingtonemedia.com2015-06-24 → 2017-02-08 · 5 obs

○ 2008-03-17 20:12:18
● 2015-06-24 08:10:48
● 2017-02-08 15:46:02
○ 2026-02-17 13:14:16
○ 2026-03-29 05:11:58

●NSns3.hostround.com2026-02-17 → 2026-03-29 · 3 obs

○ 2017-02-08 15:46:02
● 2026-02-17 13:14:16
● 2026-03-29 05:11:58

●MXlessonmanager.com2015-06-24 → 2026-03-29 · 3 obs

○ 2008-03-17 20:12:18
● 2015-06-24 08:10:48
● 2026-03-29 05:11:58

○A204.197.248.1232015-06-24 → 2017-02-08 · 5 obs

○ 2008-03-17 20:12:18
● 2015-06-24 08:10:48
● 2017-02-08 15:46:02
○ 2026-02-17 13:14:16
○ 2026-03-29 05:11:58

●A23.145.80.212026-02-17 → 2026-03-29 · 3 obs

○ 2017-02-08 15:46:02
● 2026-02-17 13:14:16
● 2026-03-29 05:11:58

●A2602:fd9e:1::212026-02-17 → 2026-03-29 · 3 obs

○ 2017-02-08 15:46:02
● 2026-02-17 13:14:16
● 2026-03-29 05:11:58

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net...	-
lessonmanager.com	ns2.hostround.com, ns1.hostround.com	2 records

✅ Authoritative Response

Server:45.77.111.166

NS records: ns2.hostround.com, ns1.hostround.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for lessonmanager.com (unsigned zone)

⏱️ Timing

Total: 179ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`23.145.80.21`
AAAA	1	`2602:fd9e:1::21`
NS	3	`ns3.hostround.com, ns1.hostround.com...`
MX	1	`lessonmanager.com (pri: 0)`
TXT	1	`v=spf1 +a +mx +ip4:207.244.110.43 +inclu`
SOA	1	`ns1.hostround.com ap.walkingbass.com`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (ns2.hostround.com, ns1.hostround.com)

Analysis

Mail Server Role

For lessonmanager.com, the mail server is lessonmanager.com.

IP Addresses

lessonmanager.com resolves to two IP numbers: 2602:fd9e:1::21 and 23.145.80.21.

other host names including mahjjong777.online, mechanicalengineeringblog.com, ayudate.org, www.tieline.com and tunemybass.com share IP numbers with lessonmanager.com.

Name Servers

lessonmanager.com is delegated to three name servers ns1.hostround.com, ns2.hostround.com and ns3.hostround.com.

lessonmanager.com at least partially shares name servers with other domains, for instance dia-afrique.org, projectaccess.co, bafonline.org.uk, xotechy.com and newsteadbrewing.com.au.

These name servers are commonly used alongside eu-ns.hostround.com and us-ns.hostround.com.

Host names with one IP number: ns1.hostround.com points to 45.77.111.166; ns2.hostround.com points to 192.25.14.90; ns3.hostround.com points to 23.145.80.40.

Mail Servers

lessonmanager.com is served by a single mail server, lessonmanager.com.

lessonmanager.com resolves to two IP numbers: 2602:fd9e:1::21 and 23.145.80.21.

lessonmanager.com - robtex.com