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email-ext-lb.tch.harvard.edu checked at 2025-10-18T15:40:58.750Z 82ms 22/22/22 100% R:10

`email-ext-lb.tch.harvard.edu`

	A	134.174.13.223^{🇺🇸 Longwood Medical and Academic Area}
			PTR	`email-ext-lb.tch.harvard.edu`

223.13.174.134.in-addr.arpa

email-ext-lb.tch.harvard.edu resolves to a single IP address: 134.174.13.223.

Other host names, for instance email.chboston.org, share IP numbers with email-ext-lb.tch.harvard.edu.

dbq

	MX	`mailsmtp1.childrenshospital.org`
	MX	`mailsmtp2.childrenshospital.org`
	MX	`mailsmtp3.childrenshospital.org`
	MX	`mailsmtp4.childrenshospital.org`
	MX	`mailsmtp5.childrenshospital.org`
	MX	`mailsmtp6.childrenshospital.org`
	MX	`mailsmtp7.childrenshospital.org`
	NS	`ns1.childrenshospital.org`
	NS	`ns2.childrenshospital.org`
	NS	`ns5.childrenshospital.org`