Dns information tool on ipmango

Ipmango.com has dns information tool which provides various types of dns information about a domain name.

The tool provides the following information about a domain name :

Top level domain (TLD) nameservers

TLD nameservers are those nameserver which provide the nameservers of a child domain name. For example the TLD nameserver of .com domains is A.GTLD-SERVERS.NET , B.GTLD-SERVERS.NET etc. So they can provide the nameserver of any .com domain

TLD may also provide the IP address of the nameserver (NS) of a particular domain. This information is also called glue information. If glue information if not available then an additional request needs to be made to find the A record of a nameserver.

The TLD of an extension like com or org can be found out by doing a whois query to iana.org

com

A.GTLD-SERVERS.NET 192.5.6.30 2001:503:a83e:0:0:0:2:30
B.GTLD-SERVERS.NET 192.33.14.30 2001:503:231d:0:0:0:2:30
C.GTLD-SERVERS.NET 192.26.92.30
D.GTLD-SERVERS.NET 192.31.80.30
E.GTLD-SERVERS.NET 192.12.94.30
F.GTLD-SERVERS.NET 192.35.51.30
G.GTLD-SERVERS.NET 192.42.93.30
H.GTLD-SERVERS.NET 192.54.112.30
I.GTLD-SERVERS.NET 192.43.172.30
J.GTLD-SERVERS.NET 192.48.79.30
K.GTLD-SERVERS.NET 192.52.178.30
L.GTLD-SERVERS.NET 192.41.162.30
M.GTLD-SERVERS.NET 192.55.83.30


org

A0.ORG.AFILIAS-NST.INFO 199.19.56.1 2001:500:e:0:0:0:0:1
A2.ORG.AFILIAS-NST.INFO 199.249.112.1 2001:500:40:0:0:0:0:1
B0.ORG.AFILIAS-NST.ORG 199.19.54.1 2001:500:c:0:0:0:0:1
B2.ORG.AFILIAS-NST.ORG 199.249.120.1 2001:500:48:0:0:0:0:1
C0.ORG.AFILIAS-NST.INFO 199.19.53.1 2001:500:b:0:0:0:0:1
D0.ORG.AFILIAS-NST.ORG 199.19.57.1 2001:500:f:0:0:0:0:1


us

A.CCTLD.US 156.154.124.70
B.CCTLD.US 156.154.125.70 2001:503:d1ae:ffff:ffff:ffff:ffff:ff7e
C.CCTLD.US 156.154.127.70
E.CCTLD.US 156.154.126.70
F.CCTLD.US 2001:500:3682:0:0:0:0:11 209.173.58.70
K.CCTLD.US 156.154.128.70 2001:503:e239:0:0:0:3:1


Iana provides the nameserver along with the ip address (both ipv4 and ipv6).
For any given domain name the TLD will tell the nameserver of that domain. If the nameserver is not available at the TLD then the domain may not be accessible over the internet.

Nameservers (NS)

Nameservers provide various kinds of DNS records related to a domain like A , CNAME , MX , SOA records etc. For example www.google.com has nameservers ns1.google.com , ns2.google.com , ns3.google.com etc.

SOA Records

SOA records specify 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.

MX Records

MX records contain the mail exchange server of a domain name. The MX server is responsible for sending and receiving mails of emails on that domain name , like abc@domain.com

A Records

‘A’ records provide the IP address of the server where a domain is hosted.

CNAME Records

CNAME or Canonical Name records provide other names for which the current domain name is an alias for. Both the domain name and the alias should have the same IP address.

The above mentioned dns records related to a domain name are frequently checked by network administrators to fix any domain name related issues. For example if the nameservers of a domain name are not setup correctly , then opening that domain in a browser will never load the correct website. It might go to some other page.

Similary MX records are checked to verify that mail functionality. If the mx server is not setup correctly then incoming mails might never be received.

Overall the above parameters indicate the “health” or performance quality of a domain name.

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