mcgrawhill.cc - robtex.com

mcgrawhill.cc

DNSSEC⚠️ Not signed
NSpdns85.ultradns.biz ⚠️ Not in zone NS records
A2610:a1:1015::79🇺🇸 MAINT-ID-120082610:a1:1015::/48 Neustar
PTRpdns85.ultradns.biz
A156.154.66.85🇺🇸 MAINT-ID-12008156.154.66.0/24 Neustar
PTRpdns85.ultradns.biz
NSpdns85.ultradns.com ⚠️ Not in zone NS records
A2001:502:f3ff::79🇺🇸 MAINT-ID-120082001:502:f3ff::/48 Neustar
PTRpdns85.ultradns.com
A156.154.64.85🇺🇸 MAINT-ID-12008156.154.64.0/24 Neustar
PTRpdns85.ultradns.com
NSpdns85.ultradns.net ⚠️ Not in zone NS records
A2610:a1:1014::79🇺🇸 MAINT-ID-120082610:a1:1014::/48 Neustar
PTRpdns85.ultradns.net
A156.154.65.85🇺🇸 MAINT-ID-12008156.154.65.0/24 Neustar
PTRpdns85.ultradns.net
NSpdns85.ultradns.org ⚠️ Not in zone NS records
A2001:502:4612::79🇺🇸 MAINT-ID-120082001:502:4612::/48 Neustar
PTRpdns85.ultradns.org
A156.154.67.85🇺🇸 MAINT-ID-12008156.154.67.0/24 Neustar
PTRpdns85.ultradns.org

cc

DNSSEC🔒 Signed (DS record present)
NSac1.nstld.com ⭐
NSac2.nstld.com
NSac3.nstld.com
NSac4.nstld.com
SOAac1.nstld.cominfo@verisign-grs.com serial=1778678692

Same first word

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DNS History

4 records (4 active, 0 former)

NSpdns85.ultradns.bizpdns85.ultradns.compdns85.ultradns.netpdns85.ultradns.org
●NSpdns85.ultradns.biz2026-04-23 → 2026-05-13 · 2 obs
● 2026-04-23 04:33:12
● 2026-05-13 13:49:24
●NSpdns85.ultradns.com2026-04-23 → 2026-05-13 · 2 obs
● 2026-04-23 04:33:12
● 2026-05-13 13:49:24
●NSpdns85.ultradns.net2026-04-23 → 2026-05-13 · 2 obs
● 2026-04-23 04:33:12
● 2026-05-13 13:49:24
●NSpdns85.ultradns.org2026-04-23 → 2026-05-13 · 2 obs
● 2026-04-23 04:33:12
● 2026-05-13 13:49:24

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
ccac1.nstld.com, ac2.nstld.com, ac3.nstld.com, ac4.nstld.com-
mcgrawhill.ccpdns85.ultradns.net, pdns85.ultradns.org, pdns85.ultradns.biz, pdns85.ultradns.com-

✅ Authoritative Response

Server:156.154.66.85

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for mcgrawhill.cc (unsigned zone)

⏱️ Timing

Total: 785ms | Queries: -

📄 Records

TypeCountSample Data

Analysis

Name Servers

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

mcgrawhill.cc shares name servers with other domains at least partially, for instance mhrmathmanitoba.com, istudybusstats.com, engradewi.com, connecteconomics.com and advanced-classrooms.com.

Host names with two IP numbers:

pdns85.ultradns.biz resolves to 2610:a1:1015::79 and 156.154.66.85.

pdns85.ultradns.com resolves to 2001:502:f3ff::79 and 156.154.64.85.

pdns85.ultradns.net resolves to 2610:a1:1014::79 and 156.154.65.85.

pdns85.ultradns.org resolves to 2001:502:4612::79 and 156.154.67.85.