MXLIST.NET - www.questdiagnostics.com

Search for IP or hostnames:

www.questdiagnostics.com checked at 2025-11-22T20:15:47.592Z 188ms 105/105/105 100% R:15 allDone:true timedOut:false

`www.questdiagnostics.com`

CNAME	`questdiagnostics.com`
NS	`ns11.questdiagnostics.com`
		A	216.203.95.72^{🇺🇸 AS27021}
			PTR	`ns11.questdiagnostics.com`
NS	`ns12.questdiagnostics.com`
		A	216.203.95.73^{🇺🇸 AS27021}
			PTR	`ns12.questdiagnostics.com`
NS	`ns1.questdiagnostics.com`
		A	216.203.80.72^{🇺🇸 AS27021}
			PTR	`ns1.questdiagnostics.com`
NS	`ns3.questdiagnostics.com`
		A	216.203.80.73^{🇺🇸 AS27021}
			PTR	`ns3.questdiagnostics.com`
MX	`cluster4.us.messagelabs.com`
		A	67.219.246.209^{🇺🇸 Google}
			PTR	`mail908.messagelabs.com`
		A	67.219.246.216^{🇺🇸 Google}
			PTR	`mail902.messagelabs.com`
		A	67.219.247.97^{🇺🇸 Google}
			PTR	`mail921.messagelabs.com`
		A	67.219.247.193^{🇺🇸 Google}
			PTR	`mail926.messagelabs.com`
		A	67.219.250.211^{🇺🇸 Google}
			PTR	`mail942.messagelabs.com`
		A	67.219.250.216^{🇺🇸 Google}
			PTR	`mail949.messagelabs.com`
MX	`cluster4a.us.messagelabs.com`
		A	34.75.172.113^{🇺🇸 Google}
			PTR	`113.172.75.34.bc.googleusercontent.com`
A	52.232.227.90^{🇺🇸 Microsoft}

`questdiagnostics.com`

	NS	`ns11.questdiagnostics.com`
	NS	`ns12.questdiagnostics.com`
	NS	`ns1.questdiagnostics.com`
	NS	`ns3.questdiagnostics.com`
	MX	`cluster4.us.messagelabs.com`
	MX	`cluster4a.us.messagelabs.com`
	A	52.232.227.90^{🇺🇸 Microsoft}

rank #12205 globally
rank #6316 in the tld

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AI analysis

www.questdiagnostics.com points to a single IP address: 52.232.227.90.

Other host names such as hairtesting.com, medplus.com, questforhealth.com, examone.ca and sedlab.com share IPs with www.questdiagnostics.com.

www.questdiagnostics.com is delegated to four name servers: ns11.questdiagnostics.com, ns12.questdiagnostics.com, ns1.questdiagnostics.com and ns3.questdiagnostics.com.

www.questdiagnostics.com at least partially shares name servers with other domains, for example medigatebridge.net, getcare360.com, phenopath.com, imugen.com and labportal.net.

Host names with one IP number:

ns11.questdiagnostics.com points to: 216.203.95.72

ns12.questdiagnostics.com points to: 216.203.95.73

ns1.questdiagnostics.com points to: 216.203.80.72

ns3.questdiagnostics.com points to: 216.203.80.73

Two mail servers handle www.questdiagnostics.com: cluster4.us.messagelabs.com and cluster4a.us.messagelabs.com.

www.questdiagnostics.com shares the same mail server setup as other domains, including automotivedealerbroker.com, chena201.na2.ford.com, crlprod-vip1.fmc3.ford.com, koopergroup.com and frafw-nat4.ford.com.

www.questdiagnostics.com shares some mail servers with other domains, at least partially, for instance eustg1.com, writeabookinaday.com, chinatelecom.com.sg and watchfulsoftware.com.

Host names with six IP numbers:

cluster4.us.messagelabs.com points to: 67.219.246.209, 67.219.246.216, 67.219.247.97, 67.219.247.193, 67.219.250.211 and 67.219.250.216.

Host names with one IP number:

cluster4a.us.messagelabs.com points to: 34.75.172.113.

dbq