`mcgrawhillscience.com`

DNSSEC	⚠️ Not signed
A	192.243.92.248
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 -all`
SOA	`pdns85.ultradns.com`hostmaster@mheducation.com 2014-12-09 #14

`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=1777180416

Same first word

mcgrawhillscience.com

DNS History

5 records (5 active, 0 former)

●NSpdns85.ultradns.biz2015-08-06 → 2026-04-26 · 2 obs

● 2015-08-06 00:24:16
● 2026-04-26 05:28:06

●NSpdns85.ultradns.com2015-08-06 → 2026-04-26 · 2 obs

● 2015-08-06 00:24:16
● 2026-04-26 05:28:06

●NSpdns85.ultradns.net2015-08-06 → 2026-04-26 · 2 obs

● 2015-08-06 00:24:16
● 2026-04-26 05:28:06

●NSpdns85.ultradns.org2015-08-06 → 2026-04-26 · 2 obs

● 2015-08-06 00:24:16
● 2026-04-26 05:28:06

●A192.243.92.2482015-08-06 → 2026-04-26 · 2 obs

● 2015-08-06 00:24:16
● 2026-04-26 05:28:06

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
com	l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net...	-
mcgrawhillscience.com	pdns85.ultradns.net, pdns85.ultradns.com, pdns85.ultradns.biz, pdns85.ultradns.org	2 records

✅ Authoritative Response

Server:156.154.65.85

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for mcgrawhillscience.com (unsigned zone)

⏱️ Timing

Total: 1191ms | Queries: -

📄 Records

Type	Count	Sample Data
A	1	`192.243.92.248`
NS	4	`pdns85.ultradns.biz, pdns85.ultradns.com...`
TXT	1	`v=spf1 -all`
SOA	1	`pdns85.ultradns.com hostmaster.mheducati`

📌 Glue Records Collected

Total: 2

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

Analysis

IP Addresses

mcgrawhillscience.com resolves to a single IP: 192.243.92.248.

Other host names, for instance mcgrawhillreading.com, mhe-fle.com, acquitymcgrawhill.com, mheducation.biz and iteachmathematics.com share IP numbers with mcgrawhillscience.com.

Name Servers

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

mcgrawhillscience.com shares some name servers with other domains, for example computing2008.com, apelectivesmcgraw-hill.com, connectprepchemistry.com, mcgrawhill.com.pr and connectpoliticalscience.net.

Host names with two IP numbers

Two IPs per host:

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

mcgrawhillscience.com - robtex.com