resolv

Modern DNS lookup utility

Build

To build the binary.

go build

Build tiny binary.

make tiny

Usage

Pass the domain you want to lookup and you're in business. For a specific record type include it after the domain. Common records are MX, SRV, SOA, A (default), AAAA, and many more.

Usage: resolv [-h -help] [-arpa] [-records] [-ratings] [-s -server <addr>] <domain> [record | alias]

Lookup mail (MX) records.

resolv cormier.co mx

There are aliases for common records (e.g. DMARC, SIP, etc.), and for simplifying commands, MAIL for MX for example.

resolv cormier.co dmarc

Aliases will be formed based on necessity.

Root servers lookup.

resolv . ns

The glorious root name servers.

NS .
code=0 num=13 rtt=20ms [very good]
-
h.root-servers.net [ttl=2600]
i.root-servers.net [ttl=2600]
j.root-servers.net [ttl=2600]
k.root-servers.net [ttl=2600]
l.root-servers.net [ttl=2600]
m.root-servers.net [ttl=2600]
a.root-servers.net [ttl=2600]
b.root-servers.net [ttl=2600]
c.root-servers.net [ttl=2600]
d.root-servers.net [ttl=2600]
e.root-servers.net [ttl=2600]
f.root-servers.net [ttl=2600]
g.root-servers.net [ttl=2600]

More

List supported records and aliases.

resolv -records

The lesser done reverse lookup.

resolv -arpa 8.8.4.4