gr3math.com - robtex.com
gr3math.com
| DNSSEC | ⚠️ Not signed | ||||||
| A | 204.74.99.100🇺🇸 MAINT-ID-12008204.74.99.0/24 Neustar | ||||||
| PTR | crs.ultradns.net | ||||||
| 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 | ||||||
| MX | mail.eppg.com ⭐ | ||||||
| TXT | v=spf1 mx -all | ||||||
| SOA | pdns85.ultradns.comhostmaster@mheducation.com 2014-06-08 #20 | ||||||
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=1777082726 | ||||||
Same first word
gr3math.com |
DNS History
7 records (6 active, 1 former)
●NSpdns85.ultradns.biz2015-09-03 → 2026-04-25 · 2 obs
● 2026-04-25 02:23:10
●NSpdns85.ultradns.com2015-09-03 → 2026-04-25 · 2 obs
● 2026-04-25 02:23:10
●NSpdns85.ultradns.net2015-09-03 → 2026-04-25 · 2 obs
● 2026-04-25 02:23:10
●NSpdns85.ultradns.org2015-09-03 → 2026-04-25 · 2 obs
● 2026-04-25 02:23:10
○A192.243.93.742015-09-03 → 2017-08-24 · 4 obs
● 2017-08-24 11:57:04
○ 2026-04-23 14:39:24
○ 2026-04-25 02:23:10
●A204.74.99.1002026-04-23 → 2026-04-25 · 3 obs
● 2026-04-23 14:39:24
● 2026-04-25 02:23:10
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | g.gtld-servers.net, i.gtld-servers.net, h.gtld-servers.net, k.gtld-servers.net... | - |
| gr3math.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 gr3math.com (unsigned zone)
⏱️ Timing
Total: 308ms | Queries: -
📄 Records
| Type | Count | Sample Data |
|---|---|---|
| A | 1 | 204.74.99.100 |
| NS | 4 | pdns85.ultradns.biz, pdns85.ultradns.com... |
| MX | 1 | mail.eppg.com (pri: 5) |
| 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
gr3math.com points to a single IP address: 204.74.99.100.
Other host names such as rainbowsystem.ca, vengaacenterwelldallas.com, bluebookboat.com, southaustraliaproperties.com.au and medicalmarijuanabusinesslicenses.com share IP numbers with gr3math.com.
Name Servers
gr3math.com is delegated to four name servers: pdns85.ultradns.biz, pdns85.ultradns.com, pdns85.ultradns.net and pdns85.ultradns.org.
At least part of the name servers for gr3math.com are shared with other domains, for instance istudentedition.com, mhrmathmanitoba.com, istudybusstats.com, engradewi.com and connecteconomics.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
Mail Servers
The mail server for gr3math.com is mail.eppg.com.
gr3math.com uses the same mail server setup as other domains, for instance realmath.com, chisholmpharmacotherapy.com, pagebeta.net, albertabiology.com and apstudysuccess.com.
gr3math.com shares at least some mail servers with other domains, for example iteachmcgraw-hill.com, wgdlm.com, successingenetics.com, mhhebookstore.com and mcgraw-hill.com.mx.