DNS Record Lookup
Look up DNS records including A, AAAA, MX, NS, SOA, CNAME, TXT, and CAA records for any domain
Hosting & Network
xu.fi runs on Akamai Cloud (Linode), with email via Proton.
- Hosting network
- Akamai Cloud (Linode)AS63949Akamai Cloud (Linode)
- Managed DNS
- Self-hosted / other
- Proton
- IPv6 (AAAA)
- Not enabled
- CAA pinning
- None
Sits alongside 4,999+ other sites on Akamai Cloud (Linode). Stable here since we started watching (Sep 2, 2026).
The apex and www are the same hosting — the apex via A records.
DNS Records for xu.fi
| Hostname | Type | TTL | Priority | Content |
|---|---|---|---|---|
| xu.fi | MX | 0 | 10 | mail.protonmail.ch |
| xu.fi | MX | 0 | 20 | mailsec.protonmail.ch |
| xu.fi | SOA | 86400 | ns1.linode.com hostmaster.xu.fi 2021000009 14400 14400 1209600 86400 | |
| xu.fi | TXT | 0 | protonmail-verification=f92d6e82d4a8bcd6959912d37c0e06b47269ea6e | |
| xu.fi | TXT | 0 | v=spf1 include:_spf.google.com include:_spf.protonmail.ch -all | |
| xu.fi | NS | 0 | ns4.linode.com | |
| xu.fi | NS | 0 | ns1.linode.com | |
| xu.fi | NS | 0 | ns3.linode.com | |
| xu.fi | NS | 0 | ns5.linode.com | |
| xu.fi | NS | 0 | ns2.linode.com | |
| xu.fi | A | 0 | 66.228.39.251 | |
| www.xu.fi | A | 0 | 66.228.39.251 |
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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