Robtex

Up: 100.19.0.0/16
Can't show all results, try to descend to a more specific CIDR
Down left: 100.19.0.0/18
Down right: 100.19.64.0/18
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
100.19.0.153	A+PTR	pool-100-19-0-153.phlapa.fios.verizon.net
100.19.9.167	A+PTR	pool-100-19-9-167.phlapa.fios.verizon.net
100.19.9.167	A	goodvibes.zapto.org
100.19.12.101	A+PTR	pool-100-19-12-101.phlapa.fios.verizon.net
100.19.12.101	A	wickershamfarm.com
100.19.12.171	A+PTR	pool-100-19-12-171.phlapa.fios.verizon.net
100.19.12.171	A	cobradatasolutions.com
100.19.19.240	A+PTR	pool-100-19-19-240.phlapa.fios.verizon.net
100.19.20.239	A+PTR	pool-100-19-20-239.phlapa.fios.verizon.net
100.19.20.239	A	mande-dev.com
100.19.27.196	A+PTR	pool-100-19-27-196.phlapa.fios.verizon.net
100.19.27.196	A	picantevr.com
100.19.31.188	A	fairtradephiladelphia.org
100.19.31.188	A	bamboohouseofnoodlesoups.com
100.19.35.42	A+PTR	pool-100-19-35-42.phlapa.fios.verizon.net
100.19.35.42	A	whiteforest.info
100.19.44.3	A+PTR	pool-100-19-44-3.phlapa.fios.verizon.net
100.19.69.91	A+PTR	pool-100-19-69-91.phlapa.fios.verizon.net
100.19.90.6	A+PTR	static-100-19-90-6.phlapa.fios.verizon.net
100.19.90.6	A	evelynlaquaif.com
100.19.90.6	A	cellochic.com
100.19.90.7	PTR	static-100-19-90-7.phlapa.fios.verizon.net
100.19.91.91	A+PTR	pool-100-19-91-91.phlapa.fios.verizon.net
100.19.95.188	A+PTR	pool-100-19-95-188.phlapa.fios.verizon.net
100.19.100.195	A+PTR	pool-100-19-100-195.phlapa.fios.verizon.net
100.19.103.11	A+PTR	pool-100-19-103-11.phlapa.fios.verizon.net
100.19.103.71	PTR	pool-100-19-103-71.phlapa.fios.verizon.net
100.19.107.205	A+PTR	pool-100-19-107-205.phlapa.fios.verizon.net