DNS Record Lookup
Look up DNS records including A, AAAA, MX, NS, SOA, CNAME, TXT, and CAA records for any domain
Hosting & Network
core4.sk runs on AS51013, with email via Microsoft 365.
- Hosting network
- AS51013AS51013
- Managed DNS
- Self-hosted / other
- Microsoft 365
- IPv6 (AAAA)
- Not enabled
- CAA pinning
- None
Sits alongside 4,999+ other sites on AS51013. Stable here since we started watching (Jul 29, 2026).
The apex and www are the same hosting — the apex via A records.
DNS Records for core4.sk
| Hostname | Type | TTL | Priority | Content |
|---|---|---|---|---|
| core4.sk | A | 0 | 37.9.168.233 | |
| core4.sk | TXT | 0 | spf2.0/pra a mx include:_sid.websupport.sk ?all | |
| core4.sk | TXT | 0 | <ep xmlns='http:\\ms.net\1'><out><m> <r>195.168.124.250<\r> <r>62.168.118.91<\r> <\m><\out><\ep> | |
| core4.sk | TXT | 0 | v=spf1 mx a:mail.core4.sk include:spf.protection.outlook.com ip4:195.168.124.250 ip4:62.168.118.91 ip4:95.105.232.239 ip4:37.9.169.117 -all | |
| core4.sk | NS | 0 | ns2.websupport.sk | |
| core4.sk | NS | 0 | ns3.websupport.sk | |
| core4.sk | NS | 0 | ns1.websupport.sk | |
| core4.sk | MX | 0 | 1 | core4-sk.mail.protection.outlook.com |
| core4.sk | SOA | 2560 | ns1.websupport.sk admin.websupport.sk 1747855772 7200 2048 1048576 2560 | |
| www.core4.sk | A | 0 | 37.9.168.233 |
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 core4.sk
BetaAnswers use the live DNS records shown on this page. AI-generated — double-check anything important.
Get alerted the moment core4.sk's DNS changes
This page is today's snapshot. Turn on monitoring and we'll watch core4.sk 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.
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