Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
nationalgridus.com
Yes
✓ Yes
Proofpoint
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-30 17:50:34 UTC · ↺ Refresh
MX Hostnames
- mx0b-003cc501.pphosted.com
- mx0a-003cc501.pphosted.com
MX Priorities
- mx0a-003cc501.pphosted.com: 10
- mx0b-003cc501.pphosted.com: 10
A / AAAA Records
- 104.16.174.181 (no PTR)
- 104.16.175.181 (no PTR)
- 104.16.171.181 (no PTR)
- 104.16.173.181 (no PTR)
- 104.16.172.181 (no PTR)
Mail Server IPs
- 205.220.160.89 ↩ mx0a-003cc501.pphosted.com
- 205.220.172.89 ↩ mx0b-003cc501.pphosted.com
SOA Record
Raw SOA
ns01.nationalgrid.com hostmaster.pcn-inc.com 2016022593 10800 3600 2419200 900
Primary NS (mname)
ns01.nationalgrid.com
Admin Email (rname)
hostmaster@pcn-inc.com
Serial
2016022593
Refresh
10800s
Retry
3600s
Expire
2419200s
Minimum TTL
900s
Nameservers (NS)
ns02.nationalgrid.com
ns01.nationalgrid.com
SPF Record
✗ Invalid
v=spf1 -all
📊 DNS lookups: 0/10
⚠ Strict -all with no allowed senders — no servers can send email for this domain.
DMARC Record
✓ Reject
v=DMARC1; p=reject; rua=mailto:[email protected]; ruf=mailto:[email protected];adkim=s;aspf=s;fo=1
✓ Reject — strongest protection
📋 SPF alignment: Strict
· DKIM alignment: Strict
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 2 found
s1._domainkey
s2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: s1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
6 records- _81sbqcjbhm9bfvc11njnrjljwha95uk
- MS=ms92117992
- docusign=3d88c1b8-ab71-41ca-950f-b6d07b216f81
- SPFv=spf1 -all
- google-site-verification=ChM3PHh0aIiXnvk2UvjhQYABeDDrRAAFbTB3mdQYftY
- _unecv44nw121zwwkepr9vhpqv7gqexe
Full email verification for nationalgridus.com
Run SMTP check, SPF/DKIM/DMARC and catch-all detection.
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