DNS Record Lookup
Look up DNS records including A, AAAA, MX, NS, SOA, CNAME, TXT, and CAA records for any domain
Hosting & Network
r40.us runs on AS53727, with email configured.
- Hosting network
- AS53727AS53727
- Managed DNS
- Self-hosted / other
- Configured
- IPv6 (AAAA)
- Enabled
- CAA pinning
- Set
Sits alongside 7 other sites on AS53727. Stable here since we started watching (Sep 4, 2026).
The apex and www are the same hosting — the apex via A records.
DNS Records for r40.us
| Hostname | Type | TTL | Priority | Content |
|---|---|---|---|---|
| r40.us | SOA | 60 | ns1.r40.us admin.tyleromeara.com 2026081852 60 60 2419200 60 | |
| r40.us | A | 0 | 23.172.56.35 | |
| r40.us | CAA | 0 | 0 iodef mailto:caa@tyleromeara.com | |
| r40.us | CAA | 0 | 0 issue letsencrypt.org | |
| r40.us | TXT | 0 | v=spf1 ip4:23.172.56.0/24 ip6:2602:f982::/48 -all | |
| r40.us | NS | 0 | ns5.he.net | |
| r40.us | NS | 0 | ns4.he.net | |
| r40.us | NS | 0 | ns1.r40.us | |
| r40.us | NS | 0 | ns2.he.net | |
| r40.us | NS | 0 | ns3.he.net | |
| r40.us | AAAA | 0 | 2602:f982:0:1200::8 | |
| r40.us | MX | 0 | 10 | mail.r40.us |
| www.r40.us | AAAA | 0 | 2602:f982:0:1200::8 | |
| www.r40.us | A | 0 | 23.172.56.35 |
Get alerted the moment r40.us's DNS changes
This page is today's snapshot. Turn on monitoring and we'll watch r40.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.
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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