Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
undergroundconstruction.com
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-03-23 10:55:36 UTC · ↺ Refresh
MX Hostnames
- undergroundconstruction-com.mail.protection.outlook.com
MX Priorities
- undergroundconstruction-com.mail.protection.outlook.com: 10
A / AAAA Records
- 141.193.213.21 (no PTR)
- 141.193.213.20 (no PTR)
Mail Server IPs
- 52.101.42.14 ↩ mail-mw2pr04cu00106.inbound.protection.outlook.com
- 52.101.41.180 ↩ mail-byapr04cu00204.inbound.protection.outlook.com
- 52.101.41.183 ↩ mail-byapr04cu00307.inbound.protection.outlook.com
- 52.101.40.0 ↩ mail-cy5pr03cu00300.inbound.protection.outlook.com
- 2a01:111:f403:f90f::1 ↩ mail-sa9pr04cu00201.inbound.protection.outlook.com
- 2a01:111:f403:c902::4 ↩ mail-sj0pr03cu01504.inbound.protection.outlook.com
- 2a01:111:f403:f804::3 ↩ mail-co1pr03cu00403.inbound.protection.outlook.com
- 2a01:111:f403:c927:: ↩ mail-bn6pr21cu00500.inbound.protection.outlook.com
SOA Record
Raw SOA
jo.ns.cloudflare.com dns.cloudflare.com 2398752270 10000 2400 604800 1800
Primary NS (mname)
jo.ns.cloudflare.com
Admin Email (rname)
dns@cloudflare.com
Serial
2398752270
Refresh
10000s
Retry
2400s
Expire
604800s
Minimum TTL
1800s
Nameservers (NS)
jo.ns.cloudflare.com
ridge.ns.cloudflare.com
SPF Record
✓ Soft Fail (~all)
v=spf1 include:_u.undergroundconstruction.com._spf.smart.ondmarc.com ~all
📊 DNS lookups: 1/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✓ Reject
v=DMARC1; p=reject; pct=100; sp=none; rua=mailto:[email protected]; ruf=mailto:[email protected]; adkim=r; aspf=r; fo=1; rf=afrf; ri=3600
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
📧 Reports → mailto:[email protected]
↳ Subdomain policy: none
DKIM Selectors
✓ 4 found
selector1._domainkey
selector2._domainkey
s1._domainkey
s2._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
14 records- pq8vnnbvc56gp391p1syfnsxxsh1llvs
- smartsheet-site-validation=0Y3Dtx-zUSMeUQeiweHQ4uJV6Va1dP0b
- SPFv=spf1 include:_u.undergroundconstruction.com._spf.smart.ondmarc.com ~all
- 0v5pkhyz27gdg8fzppfdwmx37cfnj0fx
- 2197868
- MS=ms92669126
- anthropic-domain-verification-wzttg3=VD9npYFKMTxQ9mrgVQtoqlpA9
- bWVhcnNncm91cGluYw==
- citrix-verification-code=3833cb89-8260-46a5-86bd-84b58197dfbd
- kg7cnxwd7yglg1dj3zj5f91j3q0r79ph
- kh6xj4lp0jr8bv7jwc2jnmz0bbr94bxl
- lucid-verification=ufg9enu1byr7jztPCK
- onetrust-domain-verification=5510d0c396374f209b43f38bd6b5432e
- openai-domain-verification=dv-qDFiSLFJuBgURdg00GrdVQPb
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