mcgrawhill.app - robtex.com

mcgrawhill.app

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

app

DNSSEC🔒 Signed (DS record present)
NSns-tld1.charlestonroadregistry.com ⭐
NSns-tld2.charlestonroadregistry.com
NSns-tld3.charlestonroadregistry.com
NSns-tld4.charlestonroadregistry.com
NSns-tld5.charlestonroadregistry.com
SOAns-tld1.charlestonroadregistry.comcloud-dns-hostmaster@google.com serial=101427
🔒 HSTS Preload (+subdomains)

Same first word

mcgrawhill.app
mcgrawhill.cc
mcgrawhill.education
mcgrawhill.com.ph
mcgrawhill.be
mcgrawhill.com.pr
mcgrawhill.ag
mcgrawhill.co.il
mcgrawhill.dk
mcgrawhill.gen.in
mcgrawhill.com.pe
mcgrawhill.eu
mcgrawhill.tv
mcgrawhill.cn
mcgrawhill.co.at
mcgrawhill.me
mcgrawhill.co.uk
mcgrawhill.com
mcgrawhill.pr
mcgrawhill.net
mcgrawhill.us
mcgrawhill.ie
mcgrawhill.mobi
mcgrawhill.it
mcgrawhill.mx
mcgrawhill.fr
mcgrawhill.tw
mcgrawhill.sucks
mcgrawhill.org
mcgrawhill.cx
mcgrawhill.com.ru
mcgrawhill.io
mcgrawhill.ae
mcgrawhill.ca
mcgrawhill.ph
mcgrawhill.biz

DNS History

4 records (4 active, 0 former)

NSpdns85.ultradns.bizpdns85.ultradns.compdns85.ultradns.netpdns85.ultradns.org
●NSpdns85.ultradns.biz2026-04-23 → 2026-04-25 · 2 obs
● 2026-04-23 06:24:08
● 2026-04-25 15:58:50
●NSpdns85.ultradns.com2026-04-23 → 2026-04-25 · 2 obs
● 2026-04-23 06:24:08
● 2026-04-25 15:58:50
●NSpdns85.ultradns.net2026-04-23 → 2026-04-25 · 2 obs
● 2026-04-23 06:24:08
● 2026-04-25 15:58:50
●NSpdns85.ultradns.org2026-04-23 → 2026-04-25 · 2 obs
● 2026-04-23 06:24:08
● 2026-04-25 15:58:50

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
appns-tld1.charlestonroadregistry.com, ns-tld2.charlestonroadregistry.com, ns-tld3.charlestonroadregistry.com, ns-tld4.charlestonroadregistry.com...-
mcgrawhill.apppdns85.ultradns.net, pdns85.ultradns.org, pdns85.ultradns.biz, pdns85.ultradns.com-

✅ Authoritative Response

Server:156.154.64.85

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

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for mcgrawhill.app (unsigned zone)

⏱️ Timing

Total: 742ms | Queries: -

📄 Records

TypeCountSample Data

Analysis

Name Servers

mcgrawhill.app delegates to four name servers: pdns85.ultradns.biz, pdns85.ultradns.com, pdns85.ultradns.net and pdns85.ultradns.org.

mcgrawhill.app at least partially shares name servers with other domains, including engrade.com, mhteachers.com, edmesh.com, qbposv9.com and connectanthropology.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.