mcgraw-hillanswer.com - robtex.com
mcgraw-hillanswer.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 206.40.37.239🇺🇸 AS-CALLONE206.40.36.0/23 | ||||||
| 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 mx -all | ||||||
| SOA | pdns85.ultradns.comhostmaster@mheducation.com 2014-12-04 #14 | ||||||
com
| 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=1777055112 | ||||||
Same first word
mcgraw-hillanswer.com |
DNS History
5 records (5 active, 0 former)
●NSpdns85.ultradns.biz2015-05-20 → 2026-04-24 · 2 obs
● 2026-04-24 18:39:44
●NSpdns85.ultradns.com2015-05-20 → 2026-04-24 · 2 obs
● 2026-04-24 18:39:44
●NSpdns85.ultradns.net2015-05-20 → 2026-04-24 · 2 obs
● 2026-04-24 18:39:44
●NSpdns85.ultradns.org2015-05-20 → 2026-04-24 · 2 obs
● 2026-04-24 18:39:44
●A206.40.37.2392015-05-20 → 2026-04-24 · 2 obs
● 2026-04-24 18:39:44
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | l.gtld-servers.net, j.gtld-servers.net, h.gtld-servers.net, d.gtld-servers.net... | - |
| mcgraw-hillanswer.com | 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 mcgraw-hillanswer.com (unsigned zone)
⏱️ Timing
Total: 666ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 206.40.37.239 |
| NS | 4 | pdns85.ultradns.biz, pdns85.ultradns.com... |
| TXT | 1 | v=spf1 mx -all |
| SOA | 1 | pdns85.ultradns.com hostmaster.mheducati |
📌 Glue Records Collected
Total: 2
Out-of-bailiwick: 2 (pdns85.ultradns.com, pdns85.ultradns.com)
Analysis
IP Addresses
mcgraw-hillanswer.com points to a single IP: 206.40.37.239.
Name Servers
mcgraw-hillanswer.com's delegation is handled by four name servers: pdns85.ultradns.biz, pdns85.ultradns.com, pdns85.ultradns.net and pdns85.ultradns.org.
mcgraw-hillanswer.com partially shares name servers with other domains; examples include instructionalfairgroup.com, mcgrawhill-ryerson.com, mhmultimedia8.com, comlexeasy.com and connectmktg.com.
Host names with two IPs:
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