Robtex

Up: 200.80.20.0/23
Can't show all results, try to descend to a more specific CIDR
Down left: 200.80.21.0/25
Down right: 200.80.21.128/25
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
200.80.21.15	A	ns1.freemarketgroup.com
200.80.21.15	A	ns1.freemarketgroupmail.com
200.80.21.15	A	ns1.freemarketgroupweb.com
200.80.21.16	A	ns2.freemarketgroupnet.com
200.80.21.16	A	ns2.freemarketgroupplus.com
200.80.21.16	A	ns2.offerfreemarketgroup.com
200.80.21.17	A	www.freemarketgroup.com
200.80.21.18	A	reply.freemarketgroup.com
200.80.21.24	A	offerfreemarketgroup.com
200.80.21.25	A+PTR	25.21.80.200.host.ifxnw.com.ar
200.80.21.25	A	khost6.offerfreemarketgroup.com
200.80.21.32	A	srv-host6.freemarketgroupmailing.com
200.80.21.33	A	ximap1.freemarketgroupmailing.com
200.80.21.33	A	reply.freemarketgroupmailing.com
200.80.21.36	A+PTR	36.21.80.200.host.ifxnw.com.ar
200.80.21.41	A	rmail1.newfreemarketgroup.com
200.80.21.42	A	kmail11.newfreemarketgroup.com
200.80.21.42	A	reply.newfreemarketgroup.com
200.80.21.46	A+PTR	46.21.80.200.host.ifxnw.com.ar
200.80.21.47	A+PTR	47.21.80.200.host.ifxnw.com.ar
200.80.21.49	A+PTR	mailer-jwww6.freemarketgroupnow.com
200.80.21.49	A	freemarketgroupnow.com
200.80.21.50	A+PTR	amil-host1.freemarketgroupnow.com
200.80.21.53	A+PTR	53.21.80.200.host.ifxnw.com.ar
200.80.21.54	A+PTR	54.21.80.200.host.ifxnw.com.ar
200.80.21.56	A+PTR	56.21.80.200.host.ifxnw.com.ar
200.80.21.58	A	www.freemarketgroupmail.com
200.80.21.59	A	reply.freemarketgroupmail.com
200.80.21.61	A+PTR	61.21.80.200.host.ifxnw.com.ar
200.80.21.66	A+PTR	66.21.80.200.host.ifxnw.com.ar
200.80.21.66	A	reply-host3.totalfreemarketgroup.com
200.80.21.67	A+PTR	67.21.80.200.host.ifxnw.com.ar
200.80.21.67	A	mail-host13.totalfreemarketgroup.com
200.80.21.67	A	reply.totalfreemarketgroup.com
200.80.21.72	A+PTR	72.21.80.200.host.ifxnw.com.ar
200.80.21.74	A	zmail13.tomofreemarketgroup.com
200.80.21.75	A	rhost8.tomofreemarketgroup.com
200.80.21.77	A+PTR	77.21.80.200.host.ifxnw.com.ar
200.80.21.80	A+PTR	80.21.80.200.host.ifxnw.com.ar
200.80.21.81	A+PTR	81.21.80.200.host.ifxnw.com.ar
200.80.21.82	A	zwwww-mx3.mediafreemarketgroup.com
200.80.21.83	A	reply.mediafreemarketgroup.com
200.80.21.83	A	xwww-mai-13.mediafreemarketgroup.com
200.80.21.89	A+PTR	89.21.80.200.host.ifxnw.com.ar
200.80.21.91	A	mx-auth13.topfreemarketgroup.com
200.80.21.92	A	postfix8.topfreemarketgroup.com
200.80.21.93	A+PTR	93.21.80.200.host.ifxnw.com.ar
200.80.21.96	A+PTR	96.21.80.200.host.ifxnw.com.ar
200.80.21.100	A+PTR	100.21.80.200.host.ifxnw.com.ar
200.80.21.100	A	reply.freemarketgroupmedia.com
200.80.21.100	A	smtp8.freemarketgroupmedia.com
200.80.21.101	A+PTR	101.21.80.200.host.ifxnw.com.ar
200.80.21.102	A+PTR	102.21.80.200.host.ifxnw.com.ar
200.80.21.108	A+PTR	108.21.80.200.host.ifxnw.com.ar
200.80.21.108	A	host-xmail3.freemarketgrouponline.com
200.80.21.108	A	freemarketgrouponline.com
200.80.21.109	A	zmail13.freemarketgrouponline.com
200.80.21.109	A	reply.freemarketgrouponline.com
200.80.21.111	A+PTR	111.21.80.200.host.ifxnw.com.ar
200.80.21.116	A+PTR	116.21.80.200.host.ifxnw.com.ar
200.80.21.117	A+PTR	117.21.80.200.host.ifxnw.com.ar
200.80.21.118	A	freemarketgroupweb.com
200.80.21.118	A	jj-host13.freemarketgroupweb.com
200.80.21.119	A+PTR	119.21.80.200.host.ifxnw.com.ar
200.80.21.119	A	rx-mail8.freemarketgroupweb.com
200.80.21.120	A+PTR	120.21.80.200.host.ifxnw.com.ar
200.80.21.128	A	reply.freemarketgroupnet.com
200.80.21.128	A	resource-mta3.freemarketgroupnet.com
200.80.21.140	A+PTR	140.21.80.200.host.ifxnw.com.ar
200.80.21.142	A+PTR	142.21.80.200.host.ifxnw.com.ar
200.80.21.142	A	xmail-host8.myfreemarketgroup.com
200.80.21.143	A	xmail3.myfreemarketgroup.com
200.80.21.143	A	reply.myfreemarketgroup.com
200.80.21.148	A+PTR	148.21.80.200.host.ifxnw.com.ar
200.80.21.150	A	yourfreemarketgroup.com
200.80.21.150	A	kmail3.yourfreemarketgroup.com
200.80.21.151	A+PTR	151.21.80.200.host.ifxnw.com.ar
200.80.21.151	A	reply.yourfreemarketgroup.com
200.80.21.151	A	qmail13.yourfreemarketgroup.com
200.80.21.153	A+PTR	153.21.80.200.host.ifxnw.com.ar
200.80.21.159	A+PTR	159.21.80.200.host.ifxnw.com.ar
200.80.21.161	A+PTR	161.21.80.200.host.ifxnw.com.ar
200.80.21.161	A	zwwww-mx3.ourfreemarketgroup.com
200.80.21.162	A+PTR	162.21.80.200.host.ifxnw.com.ar
200.80.21.162	A	xwww-mai-13.ourfreemarketgroup.com
200.80.21.162	A	reply.ourfreemarketgroup.com
200.80.21.163	A+PTR	163.21.80.200.host.ifxnw.com.ar
200.80.21.169	A	mx-auth13.freemarketgroupzone.com
200.80.21.169	A	freemarketgroupzone.com
200.80.21.170	A+PTR	170.21.80.200.host.ifxnw.com.ar
200.80.21.176	A+PTR	176.21.80.200.host.ifxnw.com.ar
200.80.21.177	A+PTR	177.21.80.200.host.ifxnw.com.ar
200.80.21.177	A	freemarketgroupnetwork.com
200.80.21.178	A	reply.freemarketgroupnetwork.com
200.80.21.180	A+PTR	180.21.80.200.host.ifxnw.com.ar
200.80.21.181	A+PTR	181.21.80.200.host.ifxnw.com.ar
200.80.21.184	A+PTR	184.21.80.200.host.ifxnw.com.ar
200.80.21.186	A	zmailer13.freemarketgroupsite.com
200.80.21.187	A	reply.freemarketgroupsite.com
200.80.21.191	A+PTR	191.21.80.200.host.ifxnw.com.ar
200.80.21.192	A+PTR	192.21.80.200.host.ifxnw.com.ar
200.80.21.194	A+PTR	194.21.80.200.host.ifxnw.com.ar
200.80.21.194	A	reply.centralfreemarketgroup.com
200.80.21.196	A+PTR	196.21.80.200.host.ifxnw.com.ar
200.80.21.197	A+PTR	197.21.80.200.host.ifxnw.com.ar
200.80.21.200	A+PTR	200.21.80.200.host.ifxnw.com.ar
200.80.21.202	A	freemarketgroupcenter.com
200.80.21.203	A	reply.freemarketgroupcenter.com
200.80.21.209	A+PTR	209.21.80.200.host.ifxnw.com.ar
200.80.21.210	A	freemarketgroupplace.com
200.80.21.211	A	reply.freemarketgroupplace.com
200.80.21.218	A	freemarketgroupplus.com
200.80.21.219	A+PTR	219.21.80.200.host.ifxnw.com.ar
200.80.21.219	A	reply.freemarketgroupplus.com
200.80.21.221	A+PTR	221.21.80.200.host.ifxnw.com.ar
200.80.21.224	A+PTR	224.21.80.200.host.ifxnw.com.ar
200.80.21.226	A+PTR	226.21.80.200.host.ifxnw.com.ar
200.80.21.226	A	reply.freemarketgrouppro.com
200.80.21.227	A+PTR	227.21.80.200.host.ifxnw.com.ar
200.80.21.228	A+PTR	228.21.80.200.host.ifxnw.com.ar
200.80.21.233	A	freemarketgroupclub.com
200.80.21.234	A	reply.freemarketgroupclub.com
200.80.21.235	A+PTR	235.21.80.200.host.ifxnw.com.ar
200.80.21.241	A+PTR	241.21.80.200.host.ifxnw.com.ar
200.80.21.241	A	promofreemarketgroup.com
200.80.21.242	A	reply.promofreemarketgroup.com
200.80.21.242	A	mx-auth13.promofreemarketgroup.com
200.80.21.245	A+PTR	245.21.80.200.host.ifxnw.com.ar
200.80.21.249	A	thefreemarketgroup.com
200.80.21.250	A	reply.thefreemarketgroup.com