Robtex

Up: 74.121.52.0/25
Can't show all results, try to descend to a more specific CIDR
Down left: 74.121.52.0/27
Down right: 74.121.52.32/27
(Some of the IP numbers are capped at 3 entries)

IP	Type	Hostname
74.121.52.1	A+PTR	mail4024.mkt4621.com
74.121.52.2	A+PTR	mail4025.spop-demo1.mkt4622.com
74.121.52.2	A	spop-demo1.mkt4622.com
74.121.52.2	A	mail4025.mkt4622.com
74.121.52.3	A	mail4026.mkt4623.com
74.121.52.4	A+PTR	mail6127.ourtimemedia.mkt6726.com
74.121.52.4	A	mail4027.mkt4624.com
74.121.52.4	A	mail6127.mkt6726.com
74.121.52.5	A+PTR	mail6948.e.mopar.com
74.121.52.5	A	mail6948.mkt7547.com
74.121.52.5	A	mail4028.decide.mkt4625.com
74.121.52.6	A+PTR	mail4029.humana.mkt4626.com
74.121.52.6	A	mail4029.mkt4626.com
74.121.52.7	A+PTR	mail4030.neteller.mkt4627.com
74.121.52.7	A	mail4030.mkt4627.com
74.121.52.8	A+PTR	mail4031.broadcastsolutions.mkt4628.com
74.121.52.8	A	mail4031.mkt4628.com
74.121.52.8	A	broadcastsolutions.mkt4628.com
74.121.52.9	A+PTR	mail4032.shaneco.mkt4629.com
74.121.52.9	A	mail4032.mkt4629.com
74.121.52.10	A	mail4033.mkt4630.com
74.121.52.11	A+PTR	mail4034.bonnier.mkt4631.com
74.121.52.11	A	mail4034.mkt4631.com
74.121.52.12	A	mail4035.mkt4632.com
74.121.52.13	A	mail4036.mkt4633.com
74.121.52.14	PTR	mail4037.hdandis.mkt4634.com
74.121.52.14	A	mail4037.mkt4634.com
74.121.52.15	A	mail6535.mkt7134.com
74.121.52.15	A	mail4038.mkt4635.com
74.121.52.16	PTR	mail5893.gowildgaming.mkt6492.com
74.121.52.16	A	mail4039.mkt4636.com
74.121.52.16	A	mail5893.mkt6492.com
74.121.52.17	A+PTR	mail4040.carphonewarehouse.mkt4637.com
74.121.52.17	A	mail4040.mkt4637.com
74.121.52.18	PTR	mail4041.axcessfinancial.mkt4638.com
74.121.52.18	A	mail4041.mkt4638.com
74.121.52.19	A	mail4042.mkt4639.com
74.121.52.20	A	mail4043.mkt4640.com
74.121.52.20	A	*.emeraldcoastflnews.com
74.121.52.21	PTR	mail4044.drive-dealers.mkt4641.com
74.121.52.21	A	mail4044.mkt4641.com
74.121.52.21	A	drive-dealers.mkt4641.com
74.121.52.22	A+PTR	mail4045.santanderconsumer.mkt4642.com
74.121.52.22	A	mail4045.mkt4642.com
74.121.52.22	A	santanderconsumer.mkt4642.com
74.121.52.23	A+PTR	mail4046.santanderconsumer.mkt4643.com
74.121.52.23	A	mail4046.mkt4643.com
74.121.52.23	A	santanderconsumer.mkt4643.com
74.121.52.24	A+PTR	mail4047.chuckschumer.mkt4644.com
74.121.52.24	A	mail4047.em.chuckschumer.com
74.121.52.24	A	mail4047.mkt4644.com
74.121.52.25	A+PTR	mail4048.marylandrieu.mkt4645.com
74.121.52.25	A	mail4048.mkt4645.com
74.121.52.26	A+PTR	mail4049.spop-demoip2.mkt4646.com
74.121.52.26	A	mail4049.mkt4646.com
74.121.52.26	A	spop-demoip2.mkt4646.com
74.121.52.27	A	mail4050.mkt4647.com
74.121.52.28	A+PTR	mail4051.golftown.mkt4648.com
74.121.52.28	A	mail4051.mkt4648.com
74.121.52.28	A	e.golftown.com
74.121.52.29	PTR	mail4052.southerncaliforniagas.mkt4649.com
74.121.52.29	A	southerncaliforniagas.mkt4649.com
74.121.52.29	A	mail4052.mkt4649.com
74.121.52.30	A+PTR	mail4053.programs.dlink.com
74.121.52.30	A	mail4053.dlink.mkt4650.com
74.121.52.30	A	mail4053.mkt4650.com
74.121.52.31	A+PTR	mail4054.seaworld.mkt4651.com
74.121.52.31	A	mail4054.mkt4651.com
74.121.52.31	A	seaworld.mkt4651.com
74.121.52.32	A	mail4055.mkt4652.com
74.121.52.33	A+PTR	mail4056.nowmanifest.mkt4653.com
74.121.52.33	A	mail4056.mkt4653.com
74.121.52.34	PTR	mail4057.mail.style.com
74.121.52.34	A	mail4057.mkt4654.com
74.121.52.35	PTR	mail4058.duke-energy.mkt4655.com
74.121.52.35	A	mail4058.mkt4655.com
74.121.52.36	A	mail7020.mkt7619.com
74.121.52.36	A	mail4059.mkt4656.com
74.121.52.37	A	mail6988.mkt7587.com
74.121.52.37	A	mail4060.mkt4657.com
74.121.52.38	A	mail4061.mkt4658.com
74.121.52.39	PTR	mail4062.lc-masterlock.mkt4659.com
74.121.52.39	A	mail4062.mkt4659.com
74.121.52.40	A+PTR	mail4063.keas.mkt4660.com
74.121.52.40	A	mail4063.mkt4660.com
74.121.52.41	A+PTR	mail4064.keas.mkt4661.com
74.121.52.41	A	mail4064.mkt4661.com
74.121.52.42	A+PTR	mail4065.accelerize.mkt4662.com
74.121.52.42	A	mail4065.mkt4662.com
74.121.52.43	PTR	mail4066.shop-hers.mkt4663.com
74.121.52.43	A	mail4066.mkt4663.com
74.121.52.43	A	mail5877.sunlife.mkt6476.com
74.121.52.44	A	mail4067.mkt4664.com
74.121.52.44	A	mail4067.vwrinternational.mkt4664.com
74.121.52.44	A	vwrinternational.mkt4664.com
74.121.52.45	A+PTR	mail4068.lasell.mkt4665.com
74.121.52.45	A	mail4068.mkt4665.com
74.121.52.46	PTR	mail4069.alpinefunds.mkt4666.com
74.121.52.46	A	mail4069.mkt4666.com
74.121.52.47	A+PTR	mail4070.bonnier.mkt4667.com
74.121.52.47	A	mail4070.mkt4667.com
74.121.52.47	A	bonnier.mkt4667.com
74.121.52.48	A	mail4071.mkt4668.com
74.121.52.49	A	mail7017.mkt7616.com
74.121.52.49	A	mail4072.mkt4669.com
74.121.52.50	PTR	mail4073.cheapcaribbean.mkt4670.com
74.121.52.50	A	mail4073.mkt4670.com
74.121.52.51	PTR	mail4074.notifications.ottofrei.com
74.121.52.51	A	mail4074.mkt4671.com
74.121.52.52	A+PTR	mail4075.questex.mkt4672.com
74.121.52.52	A	questexmeetingsreview.com
74.121.52.52	A	mail4075.mkt4672.com
74.121.52.53	A+PTR	mail4076.vwr.mkt4673.com
74.121.52.53	A	mail4076.mkt4673.com
74.121.52.54	A	mail4077.mkt4674.com
74.121.52.55	A+PTR	mail4078.safarinow.mkt4675.com
74.121.52.55	A	mail4078.mkt4675.com
74.121.52.56	A	mail4079.netflights.mkt4676.com
74.121.52.56	A	mail4079.mkt4676.com
74.121.52.57	A	mail4080.mkt4677.com
74.121.52.57	A	mail5496.mkt6094.com
74.121.52.58	PTR	mail4081.educationfirst.mkt4678.com
74.121.52.58	A	mail4081.mkt4678.com
74.121.52.58	A	educationfirst.mkt4678.com
74.121.52.59	A+PTR	mail4082.educationfirst.mkt4679.com
74.121.52.59	A	mail4082.mkt4679.com
74.121.52.60	A+PTR	mail4083.educationfirst.mkt4680.com
74.121.52.60	A	educationfirst.mkt4680.com
74.121.52.60	A	mail4083.mkt4680.com
74.121.52.61	A+PTR	mail4084.educationfirst.mkt4681.com
74.121.52.61	A	mail4084.mkt4681.com
74.121.52.61	A	educationfirst.mkt4681.com
74.121.52.62	A+PTR	mail4085.educationfirst.mkt4682.com
74.121.52.62	A	educationfirst.mkt4682.com
74.121.52.62	A	mail4085.mkt4682.com
74.121.52.63	PTR	mail4086.educationfirst.mkt4683.com
74.121.52.63	A	educationfirst.mkt4683.com
74.121.52.63	A	mail4086.mkt4683.com