cprclass.org - dns.ninja

cprclass.org

DNSSEC⚠️ Not signed
A172.116.115.101🇺🇸 Roadrunner172.112.0.0/13 RR-Route
PTRsyn-172-116-115-101.res.spectrum.com
NSns1.emsuniversity.com ⭐
A172.116.115.101🇺🇸 Roadrunner172.112.0.0/13 RR-Route
PTRsyn-172-116-115-101.res.spectrum.com
NSns2.emsuniversity.com
A172.116.115.101🇺🇸 Roadrunner172.112.0.0/13 RR-Route
PTRsyn-172-116-115-101.res.spectrum.com
MXmail.cprclass.org ⭐
A172.116.115.101🇺🇸 Roadrunner172.112.0.0/13 RR-Route
PTRsyn-172-116-115-101.res.spectrum.com
TXTv=spf1 +a +mx +a:wopr.emsuniversity.com -all
SOAns1.emsuniversity.comrmajor@emsuniversity.com 2026-07-21 #2

org

DNSSEC🔒 Signed (DS record present)
NSa0.org.afilias-nst.info ⭐ ⚠️ Not in parent delegation
NSa2.org.afilias-nst.info ⚠️ Not in parent delegation
NSb0.org.afilias-nst.org
NSb2.org.afilias-nst.org
NSc0.org.afilias-nst.info ⚠️ Not in parent delegation
NSd0.org.afilias-nst.org
SOAa0.org.afilias-nst.infohostmaster@donuts.email serial=1785769495
WOT: SAFE (60/100)

Subdomains

mail.cprclass.org

Same first word

cprclass.nyc
cprclass.ca
cprclass.us
cprclass.info
cprclass.org

DNS History

10 records (4 active, 6 former)

200920112013201520172019202120232025NSns1.emsuniversity.comns2.emsuniversity.comns1.cprclass.orgns2.cprclass.orgMXmail.cprclass.orgA172.116.115.10168.168.98.19869.64.94.14776.167.100.18876.176.157.123
○NSns1.cprclass.org2015-06-07 → 2020-01-20 · 5 obs
○ 2008-12-09 17:12:58
● 2015-06-07 18:17:34
● 2020-01-20 13:24:04
○ 2026-04-12 21:37:22
○ 2026-08-03 15:45:32
●NSns1.emsuniversity.com2026-04-12 → 2026-08-03 · 3 obs
○ 2020-01-20 13:24:04
● 2026-04-12 21:37:22
● 2026-08-03 15:45:32
○NSns2.cprclass.org2015-06-07 → 2020-01-20 · 5 obs
○ 2008-12-09 17:12:58
● 2015-06-07 18:17:34
● 2020-01-20 13:24:04
○ 2026-04-12 21:37:22
○ 2026-08-03 15:45:32
●NSns2.emsuniversity.com2026-04-12 → 2026-08-03 · 3 obs
○ 2020-01-20 13:24:04
● 2026-04-12 21:37:22
● 2026-08-03 15:45:32
●MXmail.cprclass.org2008-12-09 → 2026-08-03 · 2 obs
● 2008-12-09 17:12:58
● 2026-08-03 15:45:32
●A172.116.115.1012026-07-24 → 2026-08-03 · 3 obs
○ 2026-06-15 17:20:54
● 2026-07-24 09:38:28
● 2026-08-03 15:45:32
○A68.168.98.1982015-06-07 → 2017-02-18 · 5 obs
○ 2008-12-09 17:12:58
● 2015-06-07 18:17:34
● 2017-02-18 05:50:46
○ 2020-01-20 13:24:04
○ 2026-08-03 15:45:32
○A69.64.94.1472020-01-20 → 2020-01-20 · 4 obs
○ 2017-02-18 05:50:46
● 2020-01-20 13:24:04
○ 2026-04-12 21:37:22
○ 2026-08-03 15:45:32
○A76.167.100.1882026-04-12 → 2026-05-17 · 5 obs
○ 2020-01-20 13:24:04
● 2026-04-12 21:37:22
● 2026-05-17 14:31:12
○ 2026-06-15 17:20:54
○ 2026-08-03 15:45:32
○A76.176.157.1232026-06-15 → 2026-06-15 · 4 obs
○ 2026-05-17 14:31:12
● 2026-06-15 17:20:54
○ 2026-07-24 09:38:28
○ 2026-08-03 15:45:32

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
orgb0.org.afilias-nst.org, b2.org.afilias-nst.org, d0.org.afilias-nst.org-
cprclass.orgns2.emsuniversity.com, ns1.emsuniversity.com-

✅ Authoritative Response

Server:172.116.115.101

NS records: ns2.emsuniversity.com, ns1.emsuniversity.com

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for cprclass.org (unsigned zone)

⏱️ Timing

Total: 504ms | Queries: -

📄 Records

TypeCountSample Data
A1172.116.115.101
NS2ns2.emsuniversity.com, ns1.emsuniversity.com
MX1mail.cprclass.org (pri: 10)
TXT1v=spf1 +a +mx +a:wopr.emsuniversity.com
SOA1ns1.emsuniversity.com rmajor.emsuniversi

Analysis

Hierarchy

cprclass.org serves as the parent of mail.cprclass.org.

IP Addresses

cprclass.org has exactly one IP address — 172.116.115.101.

mail.emtrefresher.org, ns2.emsuniversity.com, mx.emsuniversity.com plus two other host names have IP numbers in common with cprclass.org.

Name Servers

cprclass.org is served by two delegated name servers, ns1.emsuniversity.com and ns2.emsuniversity.com.

The name server configuration of cprclass.org is shared with other domains, for instance losangelescpr.org, phoenixcpr.org, emswire.com and two others.

cprclass.org has a partial name server overlap with other domains — among them petcpronline.org and prehospital.org.

It is common to find these name servers paired with the name servers ns.petcpronline.org, ns1.prehospital.org, ns2.prehospital.org and ns.prehospital.org.

ns1.emsuniversity.com and ns2.emsuniversity.com share one IP address between them — 172.116.115.101.

These two host names — ns1.emsuniversity.com and ns2.emsuniversity.com — each point to 172.116.115.101 IP addresses.

Mail Servers

cprclass.org uses one mail server — mail.cprclass.org.

There is one IP number for mail.cprclass.org: 172.116.115.101.