What is the DNS Lookup?
With the DNS lookup you can request the DNS records from the DNS server. Usually it is used to find out the IP address for a specific domain name.
Forward and backward DNS lookup
- Forward DNS-Lookup, or simply DNS lookup, describes the usual precedure to find out the information of a certain domain.
- Reverse DNS-Lookup, or simply IP lookup, describes to reverse procedure of requesting the host name for a specific IP address.
What can I do with a DNS lookup? What kind of information do I get?
With the forward DNS lookup the following entries are checked:
- A-Record: Contains the IPv4 address to which the hostname points
- AAAA-Record: Contains the IPv6 address to which the hostname points
- MX-Record: The mail servers which are responsible for the domain
- NS-Record: The responsible name servers of a domain
- CNAME-Record: Points to a hostname
- SOA-Record: The SOA record contains administrative information for managing the zone, such as the validity period or serial number.
- TXT-Record: Freely selectable text, which is used e.g. to give more detailed information about the owner of the domain, also the entry can used for a better spam protection.
With the reverse DNS lookup you will receive the:
- PTR-Record: Basically the counterpart of the A-record. The entry points to the corresponding hostname.
Why are my entries not updated yet?
The DNS entries are updated in a few minutes at alldomains.hosting. However, it can take up to 24 hours until the entries are updated on all DNS servers worldwide.
The DNS servers store the respective entries in the cache. The TTL field (Time To Live) specifies how long the entry is valid.