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`4open`

`(root)`

	NS	`a.root-servers.net`
	NS	`b.root-servers.net`
	NS	`c.root-servers.net`
	NS	`d.root-servers.net`
	NS	`e.root-servers.net`
	NS	`f.root-servers.net`
	NS	`g.root-servers.net`
	NS	`h.root-servers.net`
	NS	`i.root-servers.net`
	NS	`j.root-servers.net`
	NS	`k.root-servers.net`
	NS	`l.root-servers.net`
	NS	`m.root-servers.net`

Starts with same word

4open.science

4open.ru

4open.de

4open.com

Starts similarily

open4.support

open4.com.au

open4.de

4open.science

open4.eu

4open.ru

4pone.com

4poen.com

4open.de

4open.com

open4.org

open4.net