Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
hightowerconstruction.com
Yes
✓ Yes
Unknown
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-19 21:17:36 UTC · ↺ Refresh
MX Hostnames
- hightowerconstruction-com.mail.protection.office365.us
MX Priorities
- hightowerconstruction-com.mail.protection.office365.us: 0
A / AAAA Records
- 198.185.159.144 (no PTR)
- 198.185.159.145 (no PTR)
- 198.49.23.144 (no PTR)
- 198.49.23.145 (no PTR)
Mail Server IPs
- 23.103.199.138 ↩ mail-bn3usg020138.inbound.protection.outlook.com
- 23.103.199.170 ↩ mail-cy1usg020170.inbound.protection.outlook.com
- 2001:489a:2202:4::10 ↩ mail-bn3usg020010.inbound.protection.outlook.com
- 2001:489a:2202:5::10 ↩ mail-cy1usg020010.inbound.protection.outlook.com
SOA Record
Raw SOA
dns1.p07.nsone.net hostmaster.nsone.net 1640026192 43200 7200 1209600 3600
Primary NS (mname)
dns1.p07.nsone.net
Admin Email (rname)
hostmaster@nsone.net
Serial
1640026192
Refresh
43200s
Retry
7200s
Expire
1209600s
Minimum TTL
3600s
Nameservers (NS)
dns2.p07.nsone.net
dns3.p07.nsone.net
dns4.p07.nsone.net
ns01.squarespacedns.com
ns02.squarespacedns.com
ns03.squarespacedns.com
ns04.squarespacedns.com
dns1.p07.nsone.net
SPF Record
✓ Strict (-all)
v=spf1 include:spf.protection.office365.us -all
📊 DNS lookups: 1/10
✓ Hard fail (-all) — strict enforcement
DMARC Record
✗ MissingNo DMARC record — emails cannot be rejected on auth failure.
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._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
4 records- SPFv=spf1 include:spf.protection.office365.us -all
- google-site-verification=wWVeAA7NtuELtvdfMJouxBJynC-QroEIsz2LIUedMVM
- MS=ms23877290
- MS=ms46363018
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