DNS Record Lookup
Look up DNS records including A, AAAA, MX, NS, SOA, CNAME, TXT, and CAA records for any domain
Hosting & Network
esr.training runs on Amazon AWS, with email configured.
- Hosting network
- Amazon AWSAS16509Amazon AWS
- Managed DNS
- Self-hosted / other
- Configured
- IPv6 (AAAA)
- Not enabled
- CAA pinning
- None
Sits alongside 3,964,848 other sites on Amazon AWS. Stable here since we started watching (Jul 31, 2026).
The apex and www are the same hosting — the apex via A records, www via a CNAME to esr.training.
DNS Records for esr.training
| Hostname | Type | TTL | Priority | Content |
|---|---|---|---|---|
| esr.training | NS | 0 | on.2ns4.com | |
| esr.training | NS | 0 | on.2ns2.com | |
| esr.training | NS | 0 | on.2ns1.com | |
| esr.training | NS | 0 | on.2ns3.com | |
| esr.training | MX | 0 | esr.training | |
| esr.training | TXT | 0 | v=spf1 +a +mx +ip4:3.105.151.205 ~all | |
| esr.training | SOA | 86400 | on.2ns1.com james.vanner.likeminded.co.nz 2026081801 3600 1800 1209600 86400 | |
| esr.training | A | 0 | 3.105.151.205 | |
| www.esr.training | NS | 0 | on.2ns4.com | |
| www.esr.training | NS | 0 | on.2ns2.com | |
| www.esr.training | NS | 0 | on.2ns1.com | |
| www.esr.training | NS | 0 | on.2ns3.com | |
| www.esr.training | CNAME | 0 | esr.training | |
| www.esr.training | A | 0 | 3.105.151.205 | |
| www.esr.training | MX | 0 | esr.training | |
| www.esr.training | TXT | 0 | v=spf1 +a +mx +ip4:3.105.151.205 ~all | |
| www.esr.training | SOA | 86400 | on.2ns1.com james.vanner.likeminded.co.nz 2026081801 3600 1800 1209600 86400 |
Get alerted the moment esr.training's DNS changes
This page is today's snapshot. Turn on monitoring and we'll watch esr.training 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