Robtex

Up: 173.243.64.0/19
Can't show all results, try to descend to a more specific CIDR
Down left: 173.243.80.0/21
Down right: 173.243.88.0/21
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
173.243.80.2	PTR	dns2.aeronetpr.com
173.243.80.3	PTR	dns1.aeronetpr.com
173.243.80.4	A+PTR	dns3.aeronetpr.com
173.243.80.62	A	netgauge.aeronetpr.com
173.243.80.74	A+PTR	dns2.aeronetpr.com
173.243.80.132	A+PTR	barracuda.aeronetpr.com
173.243.80.134	PTR	mail.aeronetpr.com
173.243.80.134	A	aeronetpr.com
173.243.80.134	A	www.aeronetpr.net
173.243.80.137	PTR	smtp.aeronetpr.com
173.243.81.18	A	mail1.ubosspr.com
173.243.81.230	A	mail1.medscanpr.com
173.243.82.210	A	gaitherpr.com
173.243.82.242	A+PTR	maila.seaborneairlines.com
173.243.83.158	A	mail.coopmayaguez.com
173.243.84.34	PTR	ns1.pcelements.com
173.243.84.34	A	backupartist.com
173.243.84.34	A	ns2.pcelements.com
173.243.84.134	A	edunorthpoint.net
173.243.84.134	A	www.edunorthpoint.net
173.243.85.110	A	mail2.nreyes.com
173.243.85.178	A	figna.gobierno.pr
173.243.85.178	A	figna.pr.gov
173.243.85.242	A	mail.eniac-corp.com
173.243.85.250	A	mail.farpr.org
173.243.86.66	PTR	aquiles.safetycord.com
173.243.86.70	PTR	dalila.safetygen.com
173.243.86.70	A	safetygen.org
173.243.86.70	A	safetygen.net
173.243.86.102	A+PTR	webmail.irsipr.com
173.243.86.102	A	www.irsipr.com
173.243.86.102	A	irsipr.com
173.243.86.150	A	mail.fuerzaindustrial.com
173.243.86.150	A	fuerzaindustrial.com
173.243.86.150	A	server.fuerzaindustrial.com
173.243.86.222	A	mail.ccdpr.org
173.243.87.34	A	mail.nextdaypr.com
173.243.87.66	A	mail.finanxial.com
173.243.87.118	A	mail.ojosypiel.com
173.243.87.138	A	mail.blueribbonpr.com
173.243.87.138	A	brtl.blueribbonpr.com
173.243.87.146	A	mail.htepr.com
173.243.88.24	A	securitybuildersgroup.com
173.243.88.86	A	fuentesa.com
173.243.89.2	A	barracuda1.paralanaturaleza.org
173.243.89.2	A	barracuda1.fideicomiso.org
173.243.89.34	A	ns1.scf-pr.com
173.243.89.34	A	scf-pr.com
173.243.89.50	A+PTR	interponce.edu
173.243.89.50	A	ns1.interponce.edu
173.243.89.114	PTR	mail.teletekpr.com
173.243.89.162	A	ns2.gcinter.edu
173.243.89.179	A+PTR	mail.mocpr.com
173.243.89.226	A	mail.mitelnpr.com
173.243.89.226	A	mitelnpr.com
173.243.90.4	A	mail.bvhpr.org
173.243.90.19	A	dmafs01.landronvera.com
173.243.90.46	A	humvi.com
173.243.90.69	A+PTR	mail.huertas.edu
173.243.90.126	A	ns2.ballesterhermanos.com
173.243.91.234	A	oficinaveloz.com
173.243.92.21	A	speedtest01.hotspotpr.net
173.243.93.14	A	*.cicpr.com
173.243.93.14	A	mail.cicpr.com
173.243.93.14	A	cicpr.com
173.243.93.46	PTR	www.ensistech.com
173.243.93.46	A	neon.ensistech.com
173.243.93.46	A	mx02.ensistech.com
173.243.93.198	A	mail.mayaguezpr.gov
173.243.93.198	A	mail.mayaguez.pr
173.243.93.222	A	marvez.marvezinsurance.com
173.243.93.238	A	stereobreast.com
173.243.93.254	A	whbpr.com
173.243.93.254	A	carlos0945.no-ip.info
173.243.94.134	A	mail.pmagpr.com
173.243.94.134	A	remote.pmagpr.com
173.243.94.134	A	smtp.pmagpr.com
173.243.94.194	PTR	ns2.pcelements.com
173.243.95.6	PTR	outlook.cpspr.org
173.243.95.38	A	mail.acrecent.com
173.243.95.82	A+PTR	mail1.varchitecture.com
173.243.95.110	A+PTR	mail.humancapital-pr.com
173.243.95.118	A+PTR	mail.cmapr.com
173.243.95.222	PTR	dns2.aeronetpr.com