`cengageschool.com`

DNSSEC	⚠️ Not signed
A	199.60.103.72^{🇺🇸 CLOUDFLARESPECTRUM199.60.103.0/24 MNT-HUBSP-8 route 199.060.103.000/24 AS209242}
A	199.60.103.172^{🇺🇸 CLOUDFLARESPECTRUM199.60.103.0/24 MNT-HUBSP-8 route 199.060.103.000/24 AS209242}
NS	`kyindxmmexternal.cengage.net` ⭐ ⚠️ Not in parent delegation
NS	`dns1.p01.nsone.net` ⚠️ Not in zone NS records
		A	2620:4d:4000:6259:7:1:0:1^{🇺🇸 NSONE2620:4d:4000::/48 PNAP-ACS nsone-1}
			PTR	`dns1.p01.nsone.net`
		A	198.51.44.1^{🇺🇸 NSONE198.51.44.0/24}
			PTR	`dns1.p01.nsone.net`
NS	`dns2.p01.nsone.net` ⚠️ Not in zone NS records
		A	2a00:edc0:6259:7:1::2^{🇺🇸 NSONE2a00:edc0:6259::/48 NS1-2}
			PTR	`dns2.p01.nsone.net`
		A	198.51.45.1^{🇺🇸 NSONE198.51.45.0/24}
			PTR	`dns2.p01.nsone.net`
NS	`dns3.p01.nsone.net` ⚠️ Not in zone NS records
		A	2620:4d:4000:6259:7:1:0:3^{🇺🇸 NSONE2620:4d:4000::/48 PNAP-ACS nsone-1}
			PTR	`dns3.p01.nsone.net`
		A	198.51.44.65^{🇺🇸 NSONE198.51.44.0/24}
			PTR	`dns3.p01.nsone.net`
NS	`dns4.p01.nsone.net` ⚠️ Not in zone NS records
		A	2a00:edc0:6259:7:1::4^{🇺🇸 NSONE2a00:edc0:6259::/48 NS1-2}
			PTR	`dns4.p01.nsone.net`
		A	198.51.45.65^{🇺🇸 NSONE198.51.45.0/24}
			PTR	`dns4.p01.nsone.net`
TXT	`v=spf1 -all`
TXT	`Google-site-verification=olSBCDVdkklf3dnKThrZ-akvSn0p8s0RuRXUZcH72iA`
SOA	`kyindxmmexternal.cengage.net`hostmaster@cengageschool.com 2025-12-04 #7

`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=1785011342

Same first word

cengageschool.com

DNS History

15 records (7 active, 8 former)

○NSa1-49.akam.net2026-02-19 → 2026-04-29 · 5 obs

○ 2017-05-17 05:20:18
● 2026-02-19 13:28:30
● 2026-04-29 08:10:36
○ 2026-05-08 22:19:44
○ 2026-07-25 20:32:42

○NSa13-64.akam.net2026-02-19 → 2026-04-29 · 5 obs

○ 2017-05-17 05:20:18
● 2026-02-19 13:28:30
● 2026-04-29 08:10:36
○ 2026-05-08 22:19:44
○ 2026-07-25 20:32:42

○NSa14-65.akam.net2026-02-19 → 2026-04-29 · 5 obs

○ 2017-05-17 05:20:18
● 2026-02-19 13:28:30
● 2026-04-29 08:10:36
○ 2026-05-08 22:19:44
○ 2026-07-25 20:32:42

●NSdns1.p01.nsone.net2026-02-19 → 2026-07-25 · 3 obs

○ 2017-05-17 05:20:18
● 2026-02-19 13:28:30
● 2026-07-25 20:32:42

●NSdns2.p01.nsone.net2026-02-19 → 2026-07-25 · 3 obs

○ 2017-05-17 05:20:18
● 2026-02-19 13:28:30
● 2026-07-25 20:32:42

●NSdns3.p01.nsone.net2026-02-19 → 2026-07-25 · 3 obs

○ 2017-05-17 05:20:18
● 2026-02-19 13:28:30
● 2026-07-25 20:32:42

●NSdns4.p01.nsone.net2026-05-08 → 2026-07-25 · 3 obs

○ 2026-04-29 08:10:36
● 2026-05-08 22:19:44
● 2026-07-25 20:32:42

●NSkyindxmmexternal.cengage.net2026-02-19 → 2026-07-25 · 3 obs

○ 2017-05-17 05:20:18
● 2026-02-19 13:28:30
● 2026-07-25 20:32:42

○NSns15.domaincontrol.com2015-08-19 → 2017-05-17 · 4 obs

● 2015-08-19 21:16:32
● 2017-05-17 05:20:18
○ 2026-02-19 13:28:30
○ 2026-07-25 20:32:42

○NSns16.domaincontrol.com2015-08-19 → 2017-05-17 · 4 obs

● 2015-08-19 21:16:32
● 2017-05-17 05:20:18
○ 2026-02-19 13:28:30
○ 2026-07-25 20:32:42

○MXmailstore1.secureserver.net2015-08-19 → 2017-05-17 · 4 obs

● 2015-08-19 21:16:32
● 2017-05-17 05:20:18
○ 2026-02-19 13:28:30
○ 2026-07-25 20:32:42

○MXsmtp.secureserver.net2015-08-19 → 2017-05-17 · 4 obs

● 2015-08-19 21:16:32
● 2017-05-17 05:20:18
○ 2026-02-19 13:28:30
○ 2026-07-25 20:32:42

○A184.168.221.882015-08-19 → 2017-05-17 · 4 obs

● 2015-08-19 21:16:32
● 2017-05-17 05:20:18
○ 2026-02-19 13:28:30
○ 2026-07-25 20:32:42

●A199.60.103.1722026-02-19 → 2026-07-25 · 3 obs

○ 2017-05-17 05:20:18
● 2026-02-19 13:28:30
● 2026-07-25 20:32:42

●A199.60.103.722026-02-19 → 2026-07-25 · 3 obs

○ 2017-05-17 05:20:18
● 2026-02-19 13:28:30
● 2026-07-25 20:32:42

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
cengageschool.com	dns1.p01.nsone.net, dns2.p01.nsone.net, dns3.p01.nsone.net, dns4.p01.nsone.net	-

✅ Authoritative Response

Server:198.51.44.65

NS records: dns1.p01.nsone.net, dns2.p01.nsone.net, dns3.p01.nsone.net, dns4.p01.nsone.net

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for cengageschool.com (unsigned zone)

⏱️ Timing

Total: 366ms | Queries: -

📄 Records

Type	Count	Sample Data
A	2	`199.60.103.72, 199.60.103.172`
NS	1	`kyindxmmexternal.cengage.net`
TXT	2	`v=spf1 -all, Google-site-verification=olSBCDVdkklf3dn`
SOA	1	`kyindxmmexternal.cengage.net hostmaster.`

Analysis

IP Addresses

cengageschool.com has two IP addresses: 199.60.103.72 and 199.60.103.172

Additional host names — specialtyinc.com, gogreensecurity.com, matrium.com.au and two others — share IP numbers with cengageschool.com.

Name Servers

Delegation for cengageschool.com is to five name servers: kyindxmmexternal.cengage.net, dns1.p01.nsone.net, dns2.p01.nsone.net and two others.

The name servers of cengageschool.com overlap at least partially with those of other domains — among them estateguidance.com, flex-factor.com, simponi.es and two more.

These name servers commonly appear in delegations together with dns3.p01.nsone.net, dns4.p01.nsone.net, ns01.squarespacedns.com and 7 other.

Each of the four hosts dns1.p01.nsone.net, dns2.p01.nsone.net, dns3.p01.nsone.net and dns4.p01.nsone.net has two IP addresses. dns1.p01.nsone.net points to 198.51.44.1 and 2620:4d:4000:6259:7:1:0:1. dns2.p01.nsone.net points to 198.51.45.1 and 2a00:edc0:6259:7:1::2. dns3.p01.nsone.net points to 198.51.44.65 and 2620:4d:4000:6259:7:1:0:3. dns4.p01.nsone.net points to 198.51.45.65 and 2a00:edc0:6259:7:1::4.

cengageschool.com - robtex.com