Robtex

Up: 131.239.28.0/22
Can't show all results, try to descend to a more specific CIDR
Down left: 131.239.30.0/24
Down right: 131.239.31.0/24
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
131.239.30.7	A	securemx1.progress.com
131.239.30.34	A	webapp.progress.com
131.239.30.55	A	progresssoft.com
131.239.30.55	A	rulescloud.com
131.239.30.55	A	webspeed.org
131.239.30.56	PTR	communities.progress.com
131.239.30.94	A	search.progress.com
131.239.30.109	PTR	www.progress.com
131.239.30.109	A	enterprisebus.net
131.239.30.109	A	getsociallyarchitected.org
131.239.30.110	PTR	www.sonicsoftware.com
131.239.30.110	A	sonicesb.com
131.239.30.112	A+PTR	pscgate.progress.com
131.239.30.113	A+PTR	dnssrv1.progress.com
131.239.30.114	A	ftp.progress.com
131.239.30.115	A+PTR	dnssrv.progress.com
131.239.30.116	A+PTR	uxbgate.progress.com
131.239.30.131	A+PTR	ntmamx1.progress.com
131.239.30.131	A	mx1.progress.com
131.239.30.132	A+PTR	ntmamx2.progress.com
131.239.30.132	A	mx3.progress.com
131.239.30.133	A	mx1-stg.progress.com
131.239.30.134	A+PTR	ntmamx3.progress.com
131.239.30.134	A	mx4.progress.com
131.239.30.135	A+PTR	ntmamx4.progress.com
131.239.30.135	A	mx5.progress.com
131.239.30.181	A	documentation.progress.com
131.239.30.192	A	ucamericasedge.progress.com
131.239.30.193	A	ucamericasedge.progress.com
131.239.30.200	A	rulescloud.com
131.239.30.200	A	progresssoftware.net
131.239.30.200	A	progress-software.com
131.239.30.216	A	uxforums.progress.com
131.239.31.200	PTR	psc-veroxity.progress.com
131.239.31.200	A	renekjudge.com
131.239.31.200	A	renekjudge.net
131.239.31.216	A	vpn.progress.com
131.239.31.251	A	my.progress.com
131.239.31.251	A	uroam.progress.com