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@gengwg
Created September 23, 2020 07:47
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How to find the root servers and tld servers:

$ nslookup 
> set type=ns
> .
Server:		192.168.0.1
Address:	192.168.0.1#53

Non-authoritative answer:
.	nameserver = g.root-servers.net.
.	nameserver = h.root-servers.net.
.	nameserver = i.root-servers.net.
.	nameserver = j.root-servers.net.
.	nameserver = k.root-servers.net.
.	nameserver = l.root-servers.net.
.	nameserver = m.root-servers.net.
.	nameserver = a.root-servers.net.
.	nameserver = b.root-servers.net.
.	nameserver = c.root-servers.net.
.	nameserver = d.root-servers.net.
.	nameserver = e.root-servers.net.
.	nameserver = f.root-servers.net.

Authoritative answers can be found from:
a.root-servers.net	internet address = 198.41.0.4
a.root-servers.net	has AAAA address 2001:503:ba3e::2:30
b.root-servers.net	internet address = 199.9.14.201
b.root-servers.net	has AAAA address 2001:500:200::b
c.root-servers.net	internet address = 192.33.4.12
c.root-servers.net	has AAAA address 2001:500:2::c
d.root-servers.net	internet address = 199.7.91.13
d.root-servers.net	has AAAA address 2001:500:2d::d
e.root-servers.net	internet address = 192.203.230.10
e.root-servers.net	has AAAA address 2001:500:a8::e
f.root-servers.net	internet address = 192.5.5.241
f.root-servers.net	has AAAA address 2001:500:2f::f
g.root-servers.net	internet address = 192.112.36.4
> com
Server:		192.168.0.1
Address:	192.168.0.1#53

Non-authoritative answer:
com	nameserver = l.gtld-servers.net.
com	nameserver = e.gtld-servers.net.
com	nameserver = m.gtld-servers.net.
com	nameserver = i.gtld-servers.net.
com	nameserver = a.gtld-servers.net.
com	nameserver = b.gtld-servers.net.
com	nameserver = j.gtld-servers.net.
com	nameserver = g.gtld-servers.net.
com	nameserver = f.gtld-servers.net.
com	nameserver = k.gtld-servers.net.
com	nameserver = c.gtld-servers.net.
com	nameserver = h.gtld-servers.net.
com	nameserver = d.gtld-servers.net.

Authoritative answers can be found from:
g.gtld-servers.net	internet address = 192.42.93.30
g.gtld-servers.net	has AAAA address 2001:503:eea3::30
f.gtld-servers.net	internet address = 192.35.51.30
f.gtld-servers.net	has AAAA address 2001:503:d414::30
k.gtld-servers.net	internet address = 192.52.178.30
k.gtld-servers.net	has AAAA address 2001:503:d2d::30
c.gtld-servers.net	internet address = 192.26.92.30
c.gtld-servers.net	has AAAA address 2001:503:83eb::30
h.gtld-servers.net	internet address = 192.54.112.30
h.gtld-servers.net	has AAAA address 2001:502:8cc::30
d.gtld-servers.net	internet address = 192.31.80.30
d.gtld-servers.net	has AAAA address 2001:500:856e::30
> edu
Server:		192.168.0.1
Address:	192.168.0.1#53

Non-authoritative answer:
edu	nameserver = f.edu-servers.net.
edu	nameserver = b.edu-servers.net.
edu	nameserver = c.edu-servers.net.
edu	nameserver = h.edu-servers.net.
edu	nameserver = k.edu-servers.net.
edu	nameserver = g.edu-servers.net.
edu	nameserver = l.edu-servers.net.
edu	nameserver = j.edu-servers.net.
edu	nameserver = e.edu-servers.net.
edu	nameserver = m.edu-servers.net.
edu	nameserver = i.edu-servers.net.
edu	nameserver = d.edu-servers.net.
edu	nameserver = a.edu-servers.net.

Authoritative answers can be found from:
> org
Server:		192.168.0.1
Address:	192.168.0.1#53

Non-authoritative answer:
org	nameserver = b0.org.afilias-nst.org.
org	nameserver = b2.org.afilias-nst.org.
org	nameserver = c0.org.afilias-nst.info.
org	nameserver = d0.org.afilias-nst.org.
org	nameserver = a0.org.afilias-nst.info.
org	nameserver = a2.org.afilias-nst.info.

Authoritative answers can be found from:
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