HTTP Header reponses of googlekeywordtool.com is the information we get when HTTP request sent to a server from connecting clients(e.g. chrome, firefox). When you input an address into your browser it sends a request to the server hosting the domain and the server responds. HTTP Header information is not directly displayed by normal web browsers like chrome, firefox etc.
There are total 6 records in domain name system (DNS) of googlekeywordtool.com, which includes 1 Address(A) record, 2 Mail Exchange(MX) records, 2 Name Server(NS) records and 1 Start of Authority(SOA) record.
Host Name of the node to which this record pertains
Type Type of resource record in symbolic representation.
IP/Target
TTL Count of seconds that the resource record stays valid.
Extra Info Additional resource record-specific data
googlekeywordtool.com
A Address Record: A 32-bit IPv4 address, most commonly used to map hostnames to an IP address of the host, but also used for DNSBLs, storing subnet masks in RFC 1101.
72.167.131.221
600
googlekeywordtool.com
MX Mail Exchange Record: Maps a domain name to a list of message transfer agents for that domain.
smtp.secureserver.net
3600
pri: 0
googlekeywordtool.com
MX Mail Exchange Record: Maps a domain name to a list of message transfer agents for that domain.
mailstore1.secureserver.net
3600
pri: 10
googlekeywordtool.com
NS Name Server Record: Delegates a DNS zone to use the given authoritative name servers.
ns27.domaincontrol.com
3600
googlekeywordtool.com
NS Name Server Record: Delegates a DNS zone to use the given authoritative name servers.
ns28.domaincontrol.com
3600
googlekeywordtool.com
SOA Start of Authority Record: Specifies authoritative information about a DNS zone, including the primary name server, the email of the domain administrator, the domain serial number, and several timers relating to refreshing the zone.
WebRankStats
Meta Description : 
visit SiteAdvisor
visit WOT
