Robtex

Up: 156.154.16.0/24
Can't show all results, try to descend to a more specific CIDR
Down left: 156.154.16.0/26
Down right: 156.154.16.64/26
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
156.154.16.16	A+PTR	smsc-tst.neustar.biz
156.154.16.22	A+PTR	neuvpn.neustar.biz
156.154.16.32	A+PTR	dc-nat.neustar.biz
156.154.16.33	A+PTR	strt3vtc2-nat.va.neustar.com
156.154.16.40	A+PTR	stihironmgr1-mgmt.neustar.com
156.154.16.41	A+PTR	stihironq1-mgmt.neustar.com
156.154.16.42	A+PTR	enum-srs.neustar.biz
156.154.16.46	A+PTR	smsc-dev.neustar.biz
156.154.16.49	A+PTR	sipix-trial.neustar.biz
156.154.16.50	PTR	beta.xri.net
156.154.16.53	A+PTR	idp.neustar.biz
156.154.16.59	A	whois-tel.neustar.biz
156.154.16.59	A	www.whois.nic.tel
156.154.16.59	A	whois.nic.tel
156.154.16.60	A	ga-tel.neustar.biz
156.154.16.60	A	tel.reg.eglb.neustar.com
156.154.16.61	A+PTR	cte-portpsnsp.neustar.biz
156.154.16.75	A+PTR	rmsprt.neustar.biz
156.154.16.80	A+PTR	iservices.inames.net
156.154.16.82	A+PTR	rms.neustar.biz
156.154.16.84	A+PTR	leap.neustar.biz
156.154.16.84	A+PTR	leap.neustar.com
156.154.16.84	A	gotleap.us
156.154.16.85	A+PTR	leapcte.neustar.biz
156.154.16.86	A+PTR	fiduciary.neustar.biz
156.154.16.86	A+PTR	legalcomplianceservices.neustar.biz
156.154.16.89	A+PTR	stihmail3.neustar.com
156.154.16.90	A+PTR	stihmail4.neustar.com
156.154.16.92	A+PTR	nationalpooling.biz
156.154.16.92	PTR	nationalpooling.com
156.154.16.92	PTR	numberpool.com
156.154.16.93	A+PTR	scp.nationalpooling.com
156.154.16.94	PTR	esqk.biz
156.154.16.94	PTR	esqk.com
156.154.16.94	A+PTR	nationalpani.com
156.154.16.95	A+PTR	stagepasftp.neustar.biz
156.154.16.114	A+PTR	ftp.nationalnanpa.com
156.154.16.116	PTR	nationalnanpa.biz
156.154.16.116	PTR	nanpa.com
156.154.16.116	PTR	nationalnanpa.com
156.154.16.120	A+PTR	rmsnpos-tmuat.neustar.com
156.154.16.121	A+PTR	rmsnpos-tm.neustar.com
156.154.16.122	A+PTR	comcast_rm.neustar.biz
156.154.16.123	PTR	rmsnpos-twc.neustar.com