Similar to ニコッとタウン

.cu

Cuil

.cw

.cx

.cy

.cz

Data URI scheme

Datagram Congestion Control Protocol

Datagram Transport Layer Security

DAViCal

.de

Disqus

DNS zone transfer

.do

.dz

.ec

Eduroam

Empas

Enterprise 2.0

.er

.es

.et

Eventbrite