Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
columbusunderground.com
Yes
✓ Yes
Google
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-25 14:19:37 UTC · ↺ Refresh
MX Hostnames
- smtp.google.com
MX Priorities
- smtp.google.com: 1
A / AAAA Records
- 104.20.25.137 (no PTR)
- 172.66.155.11
- 2606:4700:10::ac42:9b0b
- 2606:4700:10::6814:1989
Mail Server IPs
- 172.253.62.27 ↩ bc-in-f27.1e100.net
- 142.251.179.27 ↩ pd-in-f27.1e100.net
- 64.233.180.26 ↩ pe-in-f26.1e100.net
- 64.233.180.27 ↩ pe-in-f27.1e100.net
- 172.253.62.26 ↩ bc-in-f26.1e100.net
- 2607:f8b0:4004:c07::1a ↩ bc-in-f26.1e100.net
- 2607:f8b0:4004:c1f::1a ↩ pd-in-f26.1e100.net
- 2607:f8b0:4004:c21::1b ↩ pe-in-f27.1e100.net
- 2607:f8b0:4004:c21::1a ↩ pe-in-f26.1e100.net
SOA Record
Raw SOA
columbus.columbusunderground.com dns.cloudflare.com 2399448449 10000 2400 604800 1800
Primary NS (mname)
columbus.columbusunderground.com
Admin Email (rname)
dns@cloudflare.com
Serial
2399448449
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
ohio.columbusunderground.com
columbus.columbusunderground.com
SPF Record
✓ Soft Fail (~all)
v=spf1 include:_spf.google.com include:spf.constantcontact.com ?all
📊 DNS lookups: 2/10
? Neutral (?all) — no enforcement
DMARC Record
✗ p=none
v=DMARC1; p=none; rua=mailto:[email protected]
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
DKIM Selectors
✓ 1 found
google._domainkey
✓ Public key: 216 chars (valid)
✓ DKIM properly configured for selector: google
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- SPFv=spf1 include:_spf.google.com include:spf.constantcontact.com ?all
- google-site-verification=Gsxo5A0P1PFIksJn3pKpisXhUJfQyw3LVaxZx0IFF2o
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