Robtex

Up: 138.39.16.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 138.39.16.0/22
Down right: 138.39.20.0/22

IP	Type	Hostname
138.39.23.8	A	mx1.conectiv.com
138.39.23.11	A+PTR	ns1.conectiv.com
138.39.23.12	A+PTR	ns1-cacheonly.conectiv.com
138.39.23.13	A+PTR	ntp1.conectiv.com
138.39.23.21	A	search.conectiv.com
138.39.23.25	A+PTR	webapps.atlanticcityelectric.com
138.39.23.26	A+PTR	webapps.pepco.com
138.39.23.30	A	ftp.conectiv.com
138.39.23.31	A	ns1-test.conectiv.com