Domain Overview
DNS: ✓ 16h ago
Checker: ✓ 16h ago
attglobal.net
Yes
✓ Yes
Unknown
No
Yes
⚠ Yes
No
No
Checked via [email protected]
· 2026-05-20 18:31:30 UTC · ↺ Refresh
MX Hostnames
- mx4c45.carrierzone.com
- mx1c45.carrierzone.com
- mx2c45.carrierzone.com
- mx3c45.carrierzone.com
MX Priorities
- mx1c45.carrierzone.com: 10
- mx2c45.carrierzone.com: 100
- mx3c45.carrierzone.com: 110
- mx4c45.carrierzone.com: 120
A / AAAA Records
- 12.154.55.204 (no PTR)
Mail Server IPs
- 216.55.149.41 ↩ mx1c45.carrierzone.com
- 216.55.149.42 ↩ mx2c45.carrierzone.com
- 216.55.149.43 ↩ mx3c45.carrierzone.com
- 216.55.149.44 ↩ mx4c45.carrierzone.com
SOA Record
Raw SOA
ns1.us.prserv.net rm-hostmaster.ems.att.com 311 28800 7200 604800 86400
Primary NS (mname)
ns1.us.prserv.net
Admin Email (rname)
rm-hostmaster@ems.att.com
Serial
311
Refresh
28800s
Retry
7200s
Expire
604800s
Minimum TTL
86400s
Nameservers (NS)
ns4.us.prserv.net
ns1.us.prserv.net
ns3.us.prserv.net
SPF Record
✓ Soft Fail (~all)
v=spf1 a mx include:spfc45.carrierzone.com ip4:216.55.147.0/24 ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✗ None detectedNo DKIM records found for common selectors — your provider may use a custom selector name.
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
1 record- SPFv=spf1 a mx include:spfc45.carrierzone.com ip4:216.55.147.0/24 ~all
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