grprekmath.com - robtex.com
grprekmath.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=1776990686 | ||||||
Same first word
grprekmath.com |
DNS History
7 records (6 active, 1 former)
●NSpdns85.ultradns.biz2015-07-14 → 2026-04-24 · 2 obs
● 2026-04-24 00:44:50
●NSpdns85.ultradns.com2015-07-14 → 2026-04-24 · 2 obs
● 2026-04-24 00:44:50
●NSpdns85.ultradns.net2015-07-14 → 2026-04-24 · 2 obs
● 2026-04-24 00:44:50
●NSpdns85.ultradns.org2015-07-14 → 2026-04-24 · 2 obs
● 2026-04-24 00:44:50
○A192.243.93.752015-07-14 → 2017-09-05 · 4 obs
● 2017-09-05 04:05:28
○ 2026-04-23 07:37:04
○ 2026-04-24 00:44:50
●A204.74.99.1002026-04-23 → 2026-04-24 · 3 obs
● 2026-04-23 07:37:04
● 2026-04-24 00:44:50
🔍 DNS Trace
📋 Delegation Chain
| Zone | Nameservers | Glue |
|---|---|---|
| com | a.gtld-servers.net, b.gtld-servers.net, c.gtld-servers.net, d.gtld-servers.net... | - |
| grprekmath.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 grprekmath.com (unsigned zone)
⏱️ Timing
Total: 546ms | 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
grprekmath.com points to a single IP: 204.74.99.100.
Other host names, for instance elishagravesotis.biz, varta-automotive.fi, exspedia.ie, centralmarketgear.com and carlylegroup.org.nz share IP numbers with grprekmath.com.
Name Servers
grprekmath.com is delegated to four name servers: pdns85.ultradns.biz, pdns85.ultradns.com, pdns85.ultradns.net and pdns85.ultradns.org.
grprekmath.com at least partially shares its name servers with other domains, for instance mcgrawhillemt.com, mathzone.com, mh-act-top50english.com, mhecoasttocoast.com and impactsocialstudies.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.
Mail Servers
grprekmath.com is served by a single mail server, mail.eppg.com.
grprekmath.com uses the same mail server setup as other domains such as scienceontario.ca, mhcares.net, successinnutrition.com, digm7.com and asia-mcgraw-hill.com.sg.
grprekmath.com shares some mail servers with other domains, including mcgraw-hill.com.au, symptomtodiagnosis.com, kaleidoscopeintervention.com, mhln.com and wglead21.com.