Robtex

Up: 209.191.240.0/20
Can't show all results, try to descend to a more specific CIDR
Down left: 209.191.240.0/22
Down right: 209.191.244.0/22
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
209.191.243.202	A	hotspotfx.eu
209.191.246.1	A+PTR	co1.knighttrading.com
209.191.246.37	A	jc1mx01.knighttrading.com
209.191.246.37	A	mail11.knight.com
209.191.246.38	A+PTR	mail12.knight.com
209.191.246.38	A	jc1mx02.knighttrading.com
209.191.246.39	PTR	mail1.kcg.com
209.191.246.40	PTR	mail2.kcg.com
209.191.246.40	A	jcy1smtps02.knighttrading.com
209.191.246.40	A	jcy1smtps02.knight.com
209.191.246.42	A+PTR	mail14.knight.com
209.191.246.44	PTR	vpn.kcg.com
209.191.246.44	PTR	vpn.knight.com
209.191.246.44	PTR	vpntest.knight.com
209.191.247.38	A	jc1lmust3.knight.com
209.191.247.44	A	mobile.kcg.com
209.191.247.44	A	knightglobal.com
209.191.247.44	A	mobile.knightglobal.com
209.191.247.45	A	ns1.knight.com
209.191.247.49	PTR	kcg.com
209.191.247.49	PTR	rsr.kcg.com
209.191.247.49	PTR	www.kcg.com
209.191.247.50	PTR	astorllc.com
209.191.247.50	PTR	canireverse.com
209.191.247.50	PTR	ufamerica.com
209.191.247.56	A	kd.knight.com
209.191.247.61	A	jc1lnpmd1.knight.com
209.191.247.82	PTR	209-191-247-82.knight.com
209.191.247.82	A	www3.kcg.com
209.191.247.83	PTR	209-191-247-83.knight.com
209.191.247.83	A+PTR	tt.knight.com
209.191.247.86	A	www.efutures.com