mcgrawhill.cx - robtex.com

mcgrawhill.cx

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

cx

DNSSEC🔒 Signed (DS record present)
NSns.anycast.nic.cx ⭐
NSns1.anycastdns.cz
NSns2.anycastdns.cz
TXTGeneration Time: 1777090907
TXTGeneration Time ISO 8601: 2026-04-25 04:21:47
SOAns.anycast.nic.cxhostmaster@coccaregistry.org 2026-04-25 #2

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.biz2026-04-22 → 2026-04-25 · 2 obs
● 2026-04-22 10:06:34
● 2026-04-25 05:55:32
●NSpdns85.ultradns.com2026-04-22 → 2026-04-25 · 2 obs
● 2026-04-22 10:06:34
● 2026-04-25 05:55:32
●NSpdns85.ultradns.net2026-04-22 → 2026-04-25 · 2 obs
● 2026-04-22 10:06:34
● 2026-04-25 05:55:32
●NSpdns85.ultradns.org2026-04-22 → 2026-04-25 · 2 obs
● 2026-04-22 10:06:34
● 2026-04-25 05:55:32

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
cxns2.anycastdns.cz, ns.anycast.nic.cx, ns1.anycastdns.cz5 records
mcgrawhill.cxpdns85.ultradns.biz, pdns85.ultradns.com, pdns85.ultradns.net, pdns85.ultradns.org-

✅ Authoritative Response

Server:156.154.67.85

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for mcgrawhill.cx (unsigned zone)

⏱️ Timing

Total: 1338ms | Queries: -

📄 Records

TypeCountSample Data

📌 Glue Records Collected

Total: 5

In-bailiwick: 2 (ns.anycast.nic.cx, ns.anycast.nic.cx)

Out-of-bailiwick: 3 (ns2.anycastdns.cz, ns1.anycastdns.cz, ns1.anycastdns.cz)

Analysis

Name Servers

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

mcgrawhill.cx at least partially shares name servers with other domains, for example connectcit.net, textflow.mcgraw-hill.com, mh-acttop50english.com, mcgrawhill.org and sra-technology.com.

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