ROBTEX.COM - 21sip.net

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21sip.net checked at 2025-12-24T10:34:43.880Z 1001ms 39/39/39 100% R:11 allDone:true timedOut:false

`21sip.net`

	NS	`auth-ns1.verizonbusiness.com`
			A	199.249.19.10^{🇺🇸 AS3378}
				PTR	`auth-ns1.verizonbusiness.com`
	NS	`auth-ns2.verizonbusiness.com`
			A	199.249.18.65^{🇺🇸 AS3378}
				PTR	`auth-ns2.verizonbusiness.com`

`net`

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

Starts with same word

21sip.com

21sip.net

Starts similarily

21isp.com

isp21.co.jp

isp21.com

21sip.com

21sip.net

AI analysis

21sip.net is delegated to two name servers auth-ns1.verizonbusiness.com and auth-ns2.verizonbusiness.com.

21sip.net shares the same name server setup as other domains, for instance pkt.wcom.net, mae-east.net, engrtst.net, mcidial.net and worldcom.net.

21sip.net at least partially shares name servers with other domains, for instance 55.166.in-addr.arpa, pagemci.com, 128.160.198.in-addr.arpa, 10-10-9000.com and 91.39.153.in-addr.arpa.

these name servers are commonly used with the name servers ndcdns.vzbi.com, omzdns.vzbi.com, pdcdns.vzbi.com, auth01.ns.uu.net, auth50.ns.uu.net, auth61.ns.uu.net, auth200.ns.uu.net and auth210.ns.uu.net.

Host names with one IP number:

auth-ns1.verizonbusiness.com points to 199.249.19.10

auth-ns2.verizonbusiness.com points to 199.249.18.65