Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
rtcomercial.com.br
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-04 11:20:40 UTC · ↺ Refresh
MX Hostnames
- mx.b.locaweb.com.br
- mx.core.locaweb.com.br
- mx.jk.locaweb.com.br
- mx.a.locaweb.com.br
MX Priorities
- mx.a.locaweb.com.br: 20
- mx.b.locaweb.com.br: 20
- mx.jk.locaweb.com.br: 20
- mx.core.locaweb.com.br: 10
A / AAAA Records
- 104.21.90.13 (no PTR)
- 172.67.193.78 (no PTR)
- 2606:4700:3033::ac43:c14e (no PTR)
- 2606:4700:3030::6815:5a0d (no PTR)
Mail Server IPs
- 186.202.4.42 ↩ mx.a.locaweb.com.br
- 177.153.23.242 ↩ mx.b.locaweb.com.br
- 200.234.204.130 ↩ mx.jk.locaweb.com.br
- 177.153.23.241 ↩ mx.core.locaweb.com.br
SOA Record
Raw SOA
hank.ns.cloudflare.com dns.cloudflare.com 2398761391 10000 2400 604800 1800
Primary NS (mname)
hank.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2398761391
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
hank.ns.cloudflare.com
sue.ns.cloudflare.com
SPF Record
✓ Soft Fail (~all)
v=spf1 include:_spf.locaweb.com.br –all
📊 DNS lookups: 1/10
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 include:_spf.locaweb.com.br –all
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