`mcgraw-hill4learning.com`

DNSSEC	⚠️ Not signed
NS	`pdns85.ultradns.com` ⭐
		A	2001:502:f3ff::79^{🇺🇸 MAINT-ID-120082001:502:f3ff::/48 Neustar}
			PTR	`pdns85.ultradns.com`
		A	156.154.64.85^{🇺🇸 MAINT-ID-12008156.154.64.0/24 Neustar}
			PTR	`pdns85.ultradns.com`
NS	`pdns85.ultradns.biz`
		A	2610:a1:1015::79^{🇺🇸 MAINT-ID-120082610:a1:1015::/48 Neustar}
			PTR	`pdns85.ultradns.biz`
		A	156.154.66.85^{🇺🇸 MAINT-ID-12008156.154.66.0/24 Neustar}
			PTR	`pdns85.ultradns.biz`
NS	`pdns85.ultradns.net`
		A	2610:a1:1014::79^{🇺🇸 MAINT-ID-120082610:a1:1014::/48 Neustar}
			PTR	`pdns85.ultradns.net`
		A	156.154.65.85^{🇺🇸 MAINT-ID-12008156.154.65.0/24 Neustar}
			PTR	`pdns85.ultradns.net`
NS	`pdns85.ultradns.org`
		A	2001:502:4612::79^{🇺🇸 MAINT-ID-120082001:502:4612::/48 Neustar}
			PTR	`pdns85.ultradns.org`
		A	156.154.67.85^{🇺🇸 MAINT-ID-12008156.154.67.0/24 Neustar}
			PTR	`pdns85.ultradns.org`
TXT	`v=spf1 mx -all`
SOA	`pdns85.ultradns.com`hostmaster@mheducation.com 2007-10-19 #19

`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=1777075381

Same first word

mcgraw-hill4learning.org

mcgraw-hill4learning.com

mcgraw-hill4learning.net

DNS History

6 records (4 active, 2 former)

●NSpdns85.ultradns.biz2015-07-20 → 2026-04-25 · 2 obs

● 2015-07-20 07:33:42
● 2026-04-25 00:23:26

●NSpdns85.ultradns.com2015-07-20 → 2026-04-25 · 2 obs

● 2015-07-20 07:33:42
● 2026-04-25 00:23:26

●NSpdns85.ultradns.net2015-07-20 → 2026-04-25 · 2 obs

● 2015-07-20 07:33:42
● 2026-04-25 00:23:26

●NSpdns85.ultradns.org2015-07-20 → 2026-04-25 · 2 obs

● 2015-07-20 07:33:42
● 2026-04-25 00:23:26

○MXmail.eppg.com2015-07-20 → 2018-07-31 · 4 obs

● 2015-07-20 07:33:42
● 2018-07-31 09:52:38
○ 2026-04-22 21:45:18
○ 2026-04-25 00:23:26

○A12.26.55.1822015-07-20 → 2018-07-31 · 4 obs

● 2015-07-20 07:33:42
● 2018-07-31 09:52:38
○ 2026-04-22 21:45:18
○ 2026-04-25 00:23:26

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	b.gtld-servers.net, a.gtld-servers.net, f.gtld-servers.net, l.gtld-servers.net...	-
mcgraw-hill4learning.com	pdns85.ultradns.net, pdns85.ultradns.com, pdns85.ultradns.biz, pdns85.ultradns.org	2 records

✅ Authoritative Response

Server:156.154.67.85

NS records: pdns85.ultradns.net, pdns85.ultradns.com, pdns85.ultradns.biz, pdns85.ultradns.org

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for mcgraw-hill4learning.com (unsigned zone)

⏱️ Timing

Total: 885ms | Queries: -

📄 Records

Type	Count	Sample Data
NS	4	`pdns85.ultradns.biz, pdns85.ultradns.com...`
TXT	1	`v=spf1 mx -all`
SOA	1	`pdns85.ultradns.com hostmaster.mheducati`

📌 Glue Records Collected

Total: 2

Out-of-bailiwick: 2 (pdns85.ultradns.com, pdns85.ultradns.com)

Analysis

Name Servers

mcgraw-hill4learning.com is delegated to four name servers: pdns85.ultradns.biz, pdns85.ultradns.com, pdns85.ultradns.net and pdns85.ultradns.org.

mcgraw-hill4learning.com at least partially shares its name servers with other domains, for instance thedlmexpress.com, mcgrawhillhematologyoncology.com, mheacuity.com, mcgrawhillacquity.com and mathintervention.net.

Host names with two IPs: pdns85.ultradns.biz points to 2610:a1:1015::79 and 156.154.66.85; pdns85.ultradns.com points to 2001:502:f3ff::79 and 156.154.64.85; pdns85.ultradns.net points to 2610:a1:1014::79 and 156.154.65.85; pdns85.ultradns.org points to 2001:502:4612::79 and 156.154.67.85.

mcgraw-hill4learning.com - robtex.com