Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
dnb.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-18 03:49:49 UTC · ↺ Refresh
MX Hostnames
- dnb-com.mail.protection.outlook.com
MX Priorities
- dnb-com.mail.protection.outlook.com: 0
A / AAAA Records
- 173.223.153.228 ↩ a173-223-153-228.deploy.static.akamaitechnologies.com
Mail Server IPs
- 52.101.50.13 ↩ mail-mw2pr02cu00605.inbound.protection.outlook.com
- 52.101.41.3 ↩ mail-sj2pr05cu00103.inbound.protection.outlook.com
- 52.101.11.10 ↩ mail-sa9pr03cu00202.inbound.protection.outlook.com
- 52.101.41.54 ↩ mail-sj2pr05cu00506.inbound.protection.outlook.com
- 2a01:111:f403:f913:: ↩ mail-cy1pr03cu00100.inbound.protection.outlook.com
- 2a01:111:f403:c936:: ↩ mail-cy1pr05cu00400.inbound.protection.outlook.com
- 2a01:111:f403:f902::1 ↩ mail-bl2pr02cu00101.inbound.protection.outlook.com
- 2a01:111:f403:f90f::1 ↩ mail-sa9pr04cu00201.inbound.protection.outlook.com
SOA Record
Raw SOA
primaryns.dnb.com dnsadmin.dnb.com 2021085123 1200 600 1209600 3600
Primary NS (mname)
primaryns.dnb.com
Admin Email (rname)
dnsadmin@dnb.com
Serial
2021085123
Refresh
1200s
Retry
600s
Expire
1209600s
Minimum TTL
3600s
Nameservers (NS)
a1-67.akam.net
a10-67.akam.net
a6-66.akam.net
a13-66.akam.net
a12-66.akam.net
a7-66.akam.net
SPF Record
✓ Strict (-all)
v=spf1 ip4:159.137.80.91 ip4:208.226.214.236 ip4:72.19.252.170 ip4:220.130.152.173 ip4:204.92.22.200/30 ip4:12.129.29.143 ip4:158.151.208.120/24 ip4:158.151.214.66/28 ip4:165.193.97.93 ip4:72.14.161.10/31 ip4:158.106.68.11 ip4:205.216.45.11 ip4:209.112.4.10/31 ip4:209.66.117.11 ip4:209.123.45.224 include:spf.protection.outlook.com include:sendgrid.net include:_spf.salesforce.com include:spf1.dm.aliyun.com -all
📊 DNS lookups: 4/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✓ Reject
v=DMARC1;p=reject;pct=100;fo=1;ruf=mailto:[email protected];rua=mailto:[email protected]
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 5 found
selector1._domainkey
selector2._domainkey
k1._domainkey
s1._domainkey
s2._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
9 records- google-site-verification=ZVX3kiXRYyT5I8hIXfdxiVrgjftqr5S-waWjRxNXL0c
- jamf-site-verification=XQrh0aSdNcFbATnbldtvFw
- _hc2sn83etkc85jlw447nruu9dhbpdy5
- _bvsecjccauqilzo2plgsj9vbrqpp1yw
- SPFv=spf1 ip4:159.137.80.91 ip4:208.226.214.236 ip4:72.19.252.170 ip4:220.130.152.173 ip4:204.92.22.200/30 ip4:12.129.29.143 ip4:158.151.208.120/24 ip4:158.151.214.66/28 ip4:165.193.97.93 ip4:72.14.161.10/31 ip4:158.106.68.11 ip4:205.216.45.11 ip4:209.112.4.10/31 ip4:209.66.117.11 ip4:209.123.45.224 include:spf.protection.outlook.com include:sendgrid.net include:_spf.salesforce.com include:spf1.dm.aliyun.com -all
- atlassian-domain-verification=owQCWYzgP3scaCY15u2L4MqN2a/Lda353UApAv4cEJPKscnJmVDwKlOkdpSAKnXa
- _hp7c20ah0ikfywn17wamfjh8p6786ox
- _t087nr0s8p25d17ouy1ln8ppt98veob
- ibmid=a9def6cf-843c-4d36-8eca-2c307149bd63
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