Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
dnb.ca
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-18 17:53:31 UTC · ↺ Refresh
MX Hostnames
- dnb-ca.mail.protection.outlook.com
MX Priorities
- dnb-ca.mail.protection.outlook.com: 0
A / AAAA Records
- 159.137.146.87 ↩ dnb.ca
Mail Server IPs
- 52.101.10.8 ↩ mail-bn1pr04cu00100.inbound.protection.outlook.com
- 52.101.10.12 ↩ mail-bn1pr21cu00204.inbound.protection.outlook.com
- 52.101.40.1 ↩ mail-cy4pr03cu00101.inbound.protection.outlook.com
- 52.101.9.12 ↩ mail-bl0pr05cu00504.inbound.protection.outlook.com
- 2a01:111:f403:c946::5 ↩ mail-ch4pr21cu00105.inbound.protection.outlook.com
- 2a01:111:f403:c922::1 ↩ mail-bl0pr05cu00501.inbound.protection.outlook.com
- 2a01:111:f403:f804::2 ↩ mail-co1pr05cu00402.inbound.protection.outlook.com
- 2a01:111:f403:f908:: ↩ mail-bn1pr21cu00100.inbound.protection.outlook.com
SOA Record
Raw SOA
primaryns.dnb.com dnsadmin.dnb.com 2021080621 1200 600 1209600 3600
Primary NS (mname)
primaryns.dnb.com
Admin Email (rname)
dnsadmin@dnb.com
Serial
2021080621
Refresh
1200s
Retry
600s
Expire
1209600s
Minimum TTL
3600s
Nameservers (NS)
a10-67.akam.net
a13-66.akam.net
a7-66.akam.net
a6-66.akam.net
a1-67.akam.net
a12-66.akam.net
SPF Record
✓ Strict (-all)
v=spf1 mx include:sharepointonline.com -all
📊 DNS lookups: 2/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; sp=none; fo=1; rua=mailto:[email protected]; ruf=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
4 records- vAhfSWJYbtjlrmk9QcxSliR8tc+Doq2StpykKuFOnCLuSmynlEfelTNxwmjgrkrdFMmEfFwkhdxhAJB1Rzg/Jg==
- SPFv=spf1 mx include:sharepointonline.com -all
- _t087nr0s8p25d17ouy1ln8ppt98veob
- MS=ms18945846
Full email verification for dnb.ca
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