Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
czechcenter.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Did you mean: [email protected]
Checked via [email protected]
· 2026-03-26 13:06:49 UTC · ↺ Refresh
MX Hostnames
- czechcenter-com.mail.protection.outlook.com
MX Priorities
- czechcenter-com.mail.protection.outlook.com: 10
A / AAAA Records
- 81.95.96.29 ↩ default.active24.cz
Mail Server IPs
- 52.101.73.153 ↩ mail-as8pr05cu00401.inbound.protection.outlook.com
- 52.101.73.28 ↩ mail-am7pr05cu00204.inbound.protection.outlook.com
- 52.101.68.39 ↩ mail-db7pr03cu00607.inbound.protection.outlook.com
- 52.101.68.8 ↩ mail-du0pr03cu00100.inbound.protection.outlook.com
- 2a01:111:f403:ca04::b ↩ mail-dbbpr03cu00103.inbound.protection.outlook.com
- 2a01:111:f403:ca09::7 ↩ mail-am9pr04cu00107.inbound.protection.outlook.com
- 2a01:111:f403:ca09::c ↩ mail-as8pr05cu00304.inbound.protection.outlook.com
- 2a01:111:f403:ca09::1 ↩ mail-as9pr07cu00301.inbound.protection.outlook.com
SOA Record
Raw SOA
alfa.ns.active24.cz hostmaster.active24.cz 2025081203 10800 1800 1209600 3600
Primary NS (mname)
alfa.ns.active24.cz
Admin Email (rname)
hostmaster@active24.cz
Serial
2025081203
Refresh
10800s
Retry
1800s
Expire
1209600s
Minimum TTL
3600s
Nameservers (NS)
gama.ns.active24.sk
alfa.ns.active24.cz
beta.ns.active24.cz
SPF Record
✓ Soft Fail (~all)
v=spf1 redirect=_spf.ceskacentra.cz
📊 DNS lookups: 1/10
DMARC Record
✗ p=none
v=DMARC1; p=none;
⚠ p=none — monitoring only, no enforcement
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 3 found
selector1._domainkey
selector2._domainkey
default._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
2 records- MS=ms79390035
- SPFv=spf1 redirect=_spf.ceskacentra.cz
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