Robtex

Up: 103.23.64.0/21
Can't show all results, try to descend to a more specific CIDR
Down left: 103.23.64.0/23
Down right: 103.23.66.0/23
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
103.23.64.2	A+PTR	outbound11.service-now.com
103.23.64.3	PTR	vl500.cor-001b.syd2.service-now.com
103.23.64.12	A+PTR	pat-103-23-64-12.service-now.com
103.23.64.26	PTR	outbound11.service-now.com
103.23.64.26	A	d.spf.service-now.com
103.23.64.26	A	extmail.reece.com.au
103.23.64.90	A	nttictdev.service-now.com
103.23.64.100	PTR	prod.syd2.service-now.com
103.23.64.100	A	rmit.service-now.com
103.23.64.100	A	citec.service-now.com
103.23.64.130	PTR	vl502.cor-001a.syd2.service-now.com
103.23.64.131	PTR	vl502.cor-001b.syd2.service-now.com
103.23.64.135	PTR	gi0-0.dci-001b.syd2.service-now.com
103.23.64.157	PTR	gi0-0.vpn-001.syd2.service-now.com
103.23.65.2	PTR	vl500.cor-001a.bne1.service-now.com
103.23.65.3	PTR	vl500.cor-001b.bne1.service-now.com
103.23.65.26	A+PTR	outbound12.service-now.com
103.23.65.26	A	d.spf.service-now.com
103.23.65.26	A	extmail.reece.com.au
103.23.65.100	PTR	prod.bne1.service-now.com
103.23.65.100	A	citec.service-now.com
103.23.65.100	A	qlddetuat.service-now.com
103.23.65.130	PTR	vl502.cor-001a.bne1.service-now.com
103.23.65.135	PTR	gi0-0.dci-001b.bne1.service-now.com
103.23.65.157	PTR	po1.18.vpn-001.mel0.service-now.com
103.23.66.26	PTR	a103-23-66-26.deploy.akamaitechnologies.com
103.23.66.26	A	d.spf.service-now.com
103.23.66.26	A	extmail.reece.com.au
103.23.66.71	PTR	a103-23-66-71.deploy.akamaitechnologies.com
103.23.66.100	PTR	prod.sin1.service-now.com
103.23.66.100	A	apacsd.service-now.com
103.23.66.100	A	fisindia.service-now.com
103.23.66.118	A	dev29127.service-now.com
103.23.66.118	A	dev22962.service-now.com
103.23.66.118	A	dev43698.service-now.com
103.23.67.26	PTR	a103-23-67-26.deploy.static.akamaitechnologies.com
103.23.67.26	A	d.spf.service-now.com
103.23.67.26	A	extmail.reece.com.au
103.23.67.100	A+PTR	prod.hkg1.service-now.com
103.23.67.100	A	cognita.service-now.com
103.23.67.100	A	sg4s.service-now.com