DNS Record Lookup
Look up DNS records including A, AAAA, MX, NS, SOA, CNAME, TXT, and CAA records for any domain
Hosting & Network
300.cn runs on AS17428 (multi-homed across 2 networks), with email configured.
- Managed DNS
- Self-hosted / other
- Configured
- IPv6 (AAAA)
- Enabled
- CAA pinning
- None
Sits alongside 28 other sites on AS17428. Stable here since we started watching (Jul 21, 2026).
DNS Records for 300.cn
| Hostname | Type | TTL | Priority | Content |
|---|---|---|---|---|
| 300.cn | A | 0 | 117.50.168.2 | |
| 300.cn | AAAA | 0 | 2403:a200:a200:1ff0::48 | |
| 300.cn | NS | 0 | ce2.xincache.com | |
| 300.cn | NS | 0 | ce1.xincache.com | |
| 300.cn | SOA | 180 | ns11.xincache.com ns12.xincache.com 1789481132 3600 180 1209600 180 | |
| 300.cn | MX | 0 | 50 | mxu.zmail300.cn |
| 300.cn | MX | 0 | 5 | mxc.zmail300.cn |
| 300.cn | TXT | 0 | tyzcn0c453s87p93x3mfqrk9vl9x16h4 | |
| 300.cn | TXT | 0 | v=spf1 include:spfv.zmail300.cn -all | |
| 300.cn | TXT | 0 | dh5trucrdridbcu4l8b8m763h4 | |
| 300.cn | TXT | 0 | ruolwqdte4 | |
| 300.cn | TXT | 0 | 917e719950a2bf6e4ea9e5f7eb7c17eb | |
| 300.cn | TXT | 0 | y40wdsnl0jt7nwj5stpzymj70wm0pm7h | |
| www.300.cn | CNAME | 0 | www.300.cn.eo.dnse0.com | |
| www.300.cn | AAAA | 0 | 240d:c010:1f4:5::5e | |
| www.300.cn | A | 0 | 43.174.196.48 |
Get alerted the moment 300.cn's DNS changes
This page is today's snapshot. Turn on monitoring and we'll watch 300.cn 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