cu.ca - dns.ninja

cu.ca

ca

DNSSEC🔒 Signed (DS record present)
NSprd-czp-05.corp.cira.ca
NSany.ca-servers.ca
NSc.ca-servers.ca
NSd.ca-servers.ca
NSj.ca-servers.ca
SOAprd-czp-05.corp.cira.caadmin-dns@cira.ca serial=2606290700

Subdomains

Same first word

Similar names

DNS History

8 records (5 active, 3 former)

20162017201820192020202120222023202420252026NSatcodns3.atco.caatcoinns.atco.caatcoinss.atco.caMXcul-ca.mail.protection.outlook.comes3.atco.caes4.atco.caA141.118.20.225192.210.5.41
NSatcodns3.atco.ca2015-08-25 → 2026-06-29 · 2 obs
● 2015-08-25 12:20:20
● 2026-06-29 08:04:02
NSatcoinns.atco.ca2015-08-25 → 2026-06-29 · 2 obs
● 2015-08-25 12:20:20
● 2026-06-29 08:04:02
NSatcoinss.atco.ca2015-08-25 → 2026-06-29 · 2 obs
● 2015-08-25 12:20:20
● 2026-06-29 08:04:02
MXcul-ca.mail.protection.outlook.com2017-08-03 → 2026-06-29 · 3 obs
○ 2017-05-08 22:17:26
● 2017-08-03 03:49:56
● 2026-06-29 08:04:02
MXes3.atco.ca2015-08-25 → 2017-05-08 · 4 obs
● 2015-08-25 12:20:20
● 2017-05-08 22:17:26
○ 2017-08-03 03:49:56
○ 2026-06-29 08:04:02
MXes4.atco.ca2015-08-25 → 2017-05-08 · 4 obs
● 2015-08-25 12:20:20
● 2017-05-08 22:17:26
○ 2017-08-03 03:49:56
○ 2026-06-29 08:04:02
A141.118.20.2252019-08-11 → 2026-06-29 · 3 obs
○ 2019-01-09 03:02:00
● 2019-08-11 01:48:10
● 2026-06-29 08:04:02
A192.210.5.412015-08-25 → 2019-01-09 · 4 obs
● 2015-08-25 12:20:20
● 2019-01-09 03:02:00
○ 2019-08-11 01:48:10
○ 2026-06-29 08:04:02

🔍 DNS Trace

📋 Delegation Chain

ZoneNameserversGlue
cac.ca-servers.ca, d.ca-servers.ca, j.ca-servers.ca, any.ca-servers.ca-
cu.caatcoinns.atco.ca, atcodns3.atco.ca, atcoinss.atco.ca3 records

✅ Authoritative Response

Server:192.210.5.122

NS records: atcoinns.atco.ca, atcodns3.atco.ca, atcoinss.atco.ca

🔒 DNSSEC Status

⚠️ Insecure (no DNSSEC)

No DS record for cu.ca (unsigned zone)

⏱️ Timing

Total: 401ms | Queries: -

📄 Records

TypeCountSample Data
A1141.118.20.225
NS3atcoinss.atco.ca, atcodns3.atco.ca...
MX1cul-ca.mail.protection.outlook.com (pri:
TXT1MS=ms68962593
SOA1atcoinns.atco.ca root.admin.atco.ca

📌 Glue Records Collected

Total: 3

Out-of-bailiwick: 3 (atcoinss.atco.ca, atcoinns.atco.ca, atcodns3.atco.ca)

Analysis

Hierarchy

www.cu.ca is delegated beneath cu.ca.

IP Addresses

cu.ca has exactly one IP address — 141.118.20.225.

canadianutilitieslimited.ca, canutilities-holdings.com, canadianutilitieslimited.org plus two other host names have IP numbers in common with cu.ca.

Name Servers

The authoritative name servers for cu.ca are atcodns3.atco.ca, atcoinns.atco.ca and atcoinss.atco.ca — three in total.

There is at least partial name server overlap between cu.ca and other domains — atcogroupofcompanies.com, atcoltd.ca, atcosl.ca and two more among them.

The hostnames atcodns3.atco.ca, atcoinns.atco.ca and atcoinss.atco.ca each resolve to a single IP: atcodns3.atco.ca141.118.20.122, atcoinns.atco.ca192.210.10.122, atcoinss.atco.ca192.210.5.122.

Mail Servers

cu.ca uses one mail server — cul-ca.mail.protection.outlook.com.

The mail server setup of cu.ca matches that of other domains such as canadianutilitieslimited.ca, canutilities-holdings.com, canadianutilitieslimited.org and two others.

cul-ca.mail.protection.outlook.com has 8 IP addresses: 52.101.190.0, 52.101.190.1, 52.101.190.2 plus 5 more.