Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
c3construcciones.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-04 16:48:03 UTC · ↺ Refresh
MX Hostnames
- c3construcciones-com.mail.protection.outlook.com
MX Priorities
- c3construcciones-com.mail.protection.outlook.com: 0
A / AAAA Records
No A/AAAA records found.
Mail Server IPs
- 52.101.11.7 ↩ mail-sa9pr04cu00107.inbound.protection.outlook.com
- 52.101.10.10 ↩ mail-bn8pr05cu00102.inbound.protection.outlook.com
- 52.101.11.2 ↩ mail-sn1pr03cu00102.inbound.protection.outlook.com
- 52.101.10.16 ↩ mail-bn6pr21cu00500.inbound.protection.outlook.com
- 2a01:111:f403:c922:: ↩ mail-bl0pr03cu00200.inbound.protection.outlook.com
- 2a01:111:f403:c902::3 ↩ mail-sj0pr03cu01703.inbound.protection.outlook.com
- 2a01:111:f403:f802::3 ↩ mail-sj0pr03cu01403.inbound.protection.outlook.com
- 2a01:111:f403:f90b:: ↩ mail-bn6pr04cu00100.inbound.protection.outlook.com
SOA Record
Raw SOA
ns3.telmexla.net.co internet.telmexla.net.co 2025073106 1200 3600 604800 86400
Primary NS (mname)
ns3.telmexla.net.co
Admin Email (rname)
internet@telmexla.net.co
Serial
2025073106
Refresh
1200s
Retry
3600s
Expire
604800s
Minimum TTL
86400s
Nameservers (NS)
ns3.telmexla.net.co
ns2.telmexla.net.co
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.outlook.com -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✓ 1 found
default._domainkey
✓ Public key: 237 chars (valid)
✓ DKIM properly configured for selector: default
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- c3construcciones-com.mail.protection.outlook.com
- SPFv=spf1 include:spf.protection.outlook.com -all
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