DNS Record Lookup
Look up DNS records including A, AAAA, MX, NS, SOA, CNAME, TXT, and CAA records for any domain
Hosting & Network
mcda.us runs on AS54355, with DNS by AWS Route 53 and email via Microsoft 365.
- Hosting network
- AS54355AS54355
- Managed DNS
- AWS Route 53
- Microsoft 365
- IPv6 (AAAA)
- Not enabled
- CAA pinning
- None
Sits alongside 1 other sites on AS54355. Stable here since we started watching (Oct 11, 2026).
The apex and www are the same hosting — the apex via A records.
DNS Records for mcda.us
| Hostname | Type | TTL | Priority | Content |
|---|---|---|---|---|
| mcda.us | MX | 0 | 1 | mcda-us.mail.protection.outlook.com |
| mcda.us | SOA | 86400 | ns-774.awsdns-32.net awsdns-hostmaster.amazon.com 1 7200 900 1209600 86400 | |
| mcda.us | TXT | 0 | MS=ms75374322 | |
| mcda.us | TXT | 0 | google-site-verification=Np3kPOTtg_oDVq4WvO4kaXAOKzPVxTTGpXMUD3zcw44 | |
| mcda.us | TXT | 0 | apple-domain-verification=2O9z2hrbTgj0cAMN | |
| mcda.us | TXT | 0 | v=spf1 mx ip4:205.173.216.0/21 ip4:68.232.135.144 ip4:68.232.142.233 ip4:205.220.169.88 ip4:205.220.180.158 include:_spf.google.com include:spf.protection.outlook.com ~all | |
| mcda.us | TXT | 0 | cisco-ci-domain-verification=1e83fd3c657717984641b99e544d63d90eb7ec0237e8cb2b71e1cd9eb560f216 | |
| mcda.us | A | 0 | 205.173.217.121 | |
| mcda.us | NS | 0 | ns-1973.awsdns-54.co.uk | |
| mcda.us | NS | 0 | ns4.dnsimple-edge.org | |
| mcda.us | NS | 0 | ns1.dnsimple.com | |
| mcda.us | NS | 0 | ns-774.awsdns-32.net | |
| mcda.us | NS | 0 | ns-400.awsdns-50.com | |
| mcda.us | NS | 0 | ns-1352.awsdns-41.org | |
| mcda.us | NS | 0 | ns2.dnsimple-edge.net | |
| mcda.us | NS | 0 | ns3.dnsimple.com | |
| www.mcda.us | A | 0 | 205.173.217.121 |
Get alerted the moment mcda.us's DNS changes
This page is today's snapshot. Turn on monitoring and we'll watch mcda.us continuously, notifying you the moment anything moves across all three signals:
Uptime
We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.
DNS changes
We watch NS, MX, CAA, DNSSEC, CNAME and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.
TLS certificate
We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.
Free for your first domain: uptime, DNS, and certificate together. No credit card.
What's up with DNS →
Our daily roundup of the most interesting DNS changes across the web — hosting and CDN migrations, network moves, and security-config shifts.
Ask about mcda.us
BetaAnswers use the live DNS records shown on this page. AI-generated — double-check anything important.
About DNS Records
DNS (Domain Name System) records are instructions that provide information about a domain, including its IP addresses, mail servers, and other services. Common record types include:
- SOA (Start of Authority) - Contains administrative information about the zone
- NS (Nameserver) - Specifies authoritative nameservers for the domain
- A (Address) - Maps a domain to an IPv4 address
- AAAA - Maps a domain to an IPv6 address
- CNAME (Canonical Name) - Creates an alias pointing to another domain
- MX (Mail Exchange) - Specifies mail servers for the domain