`mcgrawhill.us`

DNSSEC	⚠️ Not signed
NS	`pdns85.ultradns.biz` ⚠️ Not in zone NS records
		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.com` ⚠️ Not in zone NS records
		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.net` ⚠️ Not in zone NS records
		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` ⚠️ Not in zone NS records
		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`

`us`

	DNSSEC	🔒 Signed (DS record present)
	NS	`a.cctld.us` ⭐
	NS	`b.cctld.us`
	NS	`f.cctld.us`
	NS	`k.cctld.us`
	NS	`m.cctld.us`
	NS	`n.cctld.us`
	NS	`w.cctld.us`
	NS	`x.cctld.us`
	NS	`y.cctld.us`
	SOA	`a.cctld.us`admin@tldns.godaddy serial=1777040527

Same first word

DNS History

10 records (4 active, 6 former)

○NSns1.sedoparking.com2015-06-27 → 2017-03-28 · 4 obs

● 2015-06-27 05:10:00
● 2017-03-28 19:20:12
○ 2026-04-22 09:51:52
○ 2026-04-24 14:37:18

○NSns2.sedoparking.com2015-06-27 → 2017-03-28 · 4 obs

● 2015-06-27 05:10:00
● 2017-03-28 19:20:12
○ 2026-04-22 09:51:52
○ 2026-04-24 14:37:18

●NSpdns85.ultradns.biz2026-04-22 → 2026-04-24 · 3 obs

○ 2017-03-28 19:20:12
● 2026-04-22 09:51:52
● 2026-04-24 14:37:18

●NSpdns85.ultradns.com2026-04-22 → 2026-04-24 · 3 obs

○ 2017-03-28 19:20:12
● 2026-04-22 09:51:52
● 2026-04-24 14:37:18

●NSpdns85.ultradns.net2026-04-22 → 2026-04-24 · 3 obs

○ 2017-03-28 19:20:12
● 2026-04-22 09:51:52
● 2026-04-24 14:37:18

●NSpdns85.ultradns.org2026-04-22 → 2026-04-24 · 3 obs

○ 2017-03-28 19:20:12
● 2026-04-22 09:51:52
● 2026-04-24 14:37:18

○MXlocalhost2017-03-28 → 2017-03-28 · 4 obs

○ 2016-07-11 09:29:52
● 2017-03-28 19:20:12
○ 2026-04-22 09:51:52
○ 2026-04-24 14:37:18

○MXmail.nickstel.com2015-06-27 → 2016-07-11 · 4 obs

● 2015-06-27 05:10:00
● 2016-07-11 09:29:52
○ 2017-03-28 19:20:12
○ 2026-04-24 14:37:18

○A72.52.4.1222017-03-28 → 2017-03-28 · 4 obs

○ 2016-07-11 09:29:52
● 2017-03-28 19:20:12
○ 2026-04-22 09:51:52
○ 2026-04-24 14:37:18

○A72.52.4.912015-06-27 → 2016-07-11 · 4 obs

● 2015-06-27 05:10:00
● 2016-07-11 09:29:52
○ 2017-03-28 19:20:12
○ 2026-04-24 14:37:18

🔍 DNS Trace

📋 Delegation Chain

Zone	Nameservers	Glue
us	b.cctld.us, f.cctld.us, k.cctld.us, m.cctld.us...	-
mcgrawhill.us	pdns85.ultradns.org, pdns85.ultradns.net, pdns85.ultradns.biz, pdns85.ultradns.com	-

✅ Authoritative Response

Server:156.154.66.85

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for mcgrawhill.us (unsigned zone)

⏱️ Timing

Total: 236ms | Queries: -

📄 Records

Type	Count	Sample Data

Analysis

Name Servers

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

At least part of the name servers for mcgrawhill.us are shared with other domains, for instance mcgrawhill.xn--fiqs8s, mcgrawhill4learning.net, mcgraw-hillresident.com, rbinc.com and redbirdlearning.tv.

Host names with two IP numbers:

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

mcgrawhill.us - robtex.com

mcgrawhill.us

us

Same first word

DNS History

🔍 DNS Trace

📋 Delegation Chain

✅ Authoritative Response

🔒 DNSSEC Status

⏱️ Timing

📄 Records

Analysis

Name Servers

`mcgrawhill.us`

`us`