mcgrawhill.net - robtex.com
mcgrawhill.net
| DNSSEC | ⚠️ Not signed | ||||||
| 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.comhostmaster@mheducation.com 2021-04-12 #5 | ||||||
net
| 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.netnstld@verisign-grs.com serial=1776110677 | ||||||
Same first word
mcgrawhill.co.uk |
mcgrawhill.com |
mcgrawhill.net |
mcgrawhill.mobi |
mcgrawhill.it |
mcgrawhill.fr |
mcgrawhill.sucks |
mcgrawhill.org |
mcgrawhill.ca |
mcgrawhill.biz |
mcgrawhill.be |
mcgrawhill.eu |
mcgrawhill.cn |
DNS History
7 records (4 active, 3 former)
○NScorp-55w-ns1.mcgraw-hill.com2015-09-01 → 2017-09-07 · 4 obs
● 2017-09-07 01:14:08
○ 2026-03-02 05:36:28
○ 2026-04-13 20:19:32
○NScorp-hts-ns1.mcgraw-hill.com2015-09-01 → 2017-09-07 · 4 obs
● 2017-09-07 01:14:08
○ 2026-03-02 05:36:28
○ 2026-04-13 20:19:32
○NScorp-ukc-ns1.mcgraw-hill.com2015-09-01 → 2017-09-07 · 4 obs
● 2017-09-07 01:14:08
○ 2026-03-02 05:36:28
○ 2026-04-13 20:19:32
●NSpdns85.ultradns.biz2026-03-02 → 2026-04-13 · 3 obs
● 2026-03-02 05:36:28
● 2026-04-13 20:19:32
●NSpdns85.ultradns.com2026-03-02 → 2026-04-13 · 3 obs
● 2026-03-02 05:36:28
● 2026-04-13 20:19:32
●NSpdns85.ultradns.net2026-03-02 → 2026-04-13 · 3 obs
● 2026-03-02 05:36:28
● 2026-04-13 20:19:32
●NSpdns85.ultradns.org2026-03-02 → 2026-04-13 · 3 obs
● 2026-03-02 05:36:28
● 2026-04-13 20:19:32
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| net | g.gtld-servers.net, k.gtld-servers.net, j.gtld-servers.net, b.gtld-servers.net... | - |
| mcgrawhill.net | 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 mcgrawhill.net (unsigned zone)
⏱️ Timing
Total: 491ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| 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.net, pdns85.ultradns.net)
Analysis
Name Servers
mcgrawhill.net is delegated to four name servers: pdns85.ultradns.biz, pdns85.ultradns.com, pdns85.ultradns.net and pdns85.ultradns.org.
mcgrawhill.net at least partially shares name servers with other domains, for instance mytelemed.com, mhpractice.com.sg, iteach-geosciences.com, glencoemcgrawhill.com and mcgrawhilleducationblog.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.