Robtex

Up: 144.57.0.0/18
Can't show all results, try to descend to a more specific CIDR
Down left: 144.57.32.0/20
Down right: 144.57.48.0/20

IP	Type	Hostname
144.57.32.15	A+PTR	mail.skanska.com
144.57.32.39	A	prologtest.skanska.com
144.57.32.41	A	apps.skanska.com
144.57.32.48	A	myskanska.com
144.57.56.10	A+PTR	workplace.skanska.com
144.57.56.17	A	apps.skanska.com
144.57.56.26	A+PTR	mobile.skanskausa.com
144.57.56.53	A+PTR	meet.skanska.com
144.57.56.53	A+PTR	skype-ext.skanska.com
144.57.62.3	PTR	host-144.57.62.3.skanskausa.com