| 74.121.52.0 | — | — |
| 74.121.52.1 | mail4024.mkt4621.com | — |
| 74.121.52.2 | mail4025.spop-demo1.mkt4622.com | — |
| 74.121.52.3 | — | — |
| 74.121.52.4 | mail6127.ourtimemedia.mkt6726.com | — |
| 74.121.52.5 | mail6948.e.mopar.com | — |
| 74.121.52.6 | mail4029.humana.mkt4626.com | — |
| 74.121.52.7 | mail4030.neteller.mkt4627.com | — |
| 74.121.52.8 | — | — |
| 74.121.52.9 | mail4032.shaneco.mkt4629.com | — |
| 74.121.52.10 | mail4033.trivita.mkt4630.com | — |
| 74.121.52.11 | mail4034.bonnier.mkt4631.com | — |
| 74.121.52.12 | mail4035.graffiticaps.mkt4632.com | — |
| 74.121.52.13 | mail4036.crowshootingsupply.mkt4633.com | — |
| 74.121.52.14 | mail4037.hdandis.mkt4634.com | — |
| 74.121.52.15 | mail6535.creditsafeuk.mkt7134.com | — |
| 74.121.52.16 | mail5893.gowildgaming.mkt6492.com | — |
| 74.121.52.17 | mail4040.carphonewarehouse.mkt4637.com | — |
| 74.121.52.18 | mail4041.axcessfinancial.mkt4638.com | — |
| 74.121.52.19 | mail4042.campusacquisitions.mkt4639.com | — |
| 74.121.52.20 | mail4043.emeraldcoastflnews.com | — |
| 74.121.52.21 | mail4044.drive-dealers.mkt4641.com | — |
| 74.121.52.22 | mail4045.santanderconsumer.mkt4642.com | — |
| 74.121.52.23 | mail4046.santanderconsumer.mkt4643.com | — |
| 74.121.52.24 | mail4047.em.chuckschumer.com | — |
| 74.121.52.25 | mail4048.marylandrieu.mkt4645.com | — |
| 74.121.52.26 | mail4049.spop-demoip2.mkt4646.com | — |
| 74.121.52.27 | mail4050.insteon.mkt4647.com | — |
| 74.121.52.28 | mail4051.golftown.mkt4648.com | — |
| 74.121.52.29 | mail4052.southerncaliforniagas.mkt4649.com | — |
| 74.121.52.30 | mail4053.programs.dlink.com | — |
| 74.121.52.31 | mail4054.seaworld.mkt4651.com | — |
| 74.121.52.32 | mail4055.email.bensonhedgespr.com | — |
| 74.121.52.33 | mail4056.nowmanifest.mkt4653.com | — |
| 74.121.52.34 | mail4057.mail.style.com | — |
| 74.121.52.35 | mail4058.dynegy.mkt4655.com | — |
| 74.121.52.36 | mail7020.thredbo.mkt7619.com | — |
| 74.121.52.37 | mail6988.email.hotstripecasino.com | — |
| 74.121.52.38 | mail4061.sportsexpos.mkt4658.com | — |
| 74.121.52.39 | mail4062.lc-masterlock.mkt4659.com | — |
| 74.121.52.40 | mail4063.keas.mkt4660.com | — |
| 74.121.52.41 | mail4064.keas.mkt4661.com | — |
| 74.121.52.42 | mail4065.accelerize.mkt4662.com | — |
| 74.121.52.43 | mail5877.sunlife.mkt6476.com | — |
| 74.121.52.44 | mail4067.vwrinternational.mkt4664.com | — |
| 74.121.52.45 | mail4068.lasell.mkt4665.com | — |
| 74.121.52.46 | mail4069.alpinefunds.mkt4666.com | — |
| 74.121.52.47 | mail4070.bonnier.mkt4667.com | — |
| 74.121.52.48 | mail4071.medamericaltc.mkt4668.com | — |
| 74.121.52.49 | mail7017.info.safesender.email | — |
| 74.121.52.50 | mail4073.cheapcaribbean.mkt4670.com | — |
| 74.121.52.51 | mail4074.notifications.ottofrei.com | — |
| 74.121.52.52 | mail4075.questex.mkt4672.com | — |
| 74.121.52.53 | mail4076.vwr.mkt4673.com | — |
| 74.121.52.54 | mail4077.vwr.mkt4674.com | — |
| 74.121.52.55 | mail4078.safarinow.mkt4675.com | — |
| 74.121.52.56 | mail4079.netflights.mkt4676.com | — |
| 74.121.52.57 | mail5496.futuredontics.mkt6094.com | — |
| 74.121.52.58 | — | — |
| 74.121.52.59 | mail15667.e.forwardbluepac.com | — |
| 74.121.52.60 | — | — |
| 74.121.52.61 | mail15668.ctx-11aug-ahcd.babayaga-acoustic.pl | — |
| 74.121.52.62 | mail15671.info.wingotv2028.com | — |
| 74.121.52.63 | — | — |
| 74.121.52.64 | mail4087.yankeecandle-uk.mkt4684.com | — |
| 74.121.52.65 | mail4088.sclnewsletters.mkt4685.com | — |
| 74.121.52.66 | — | — |
| 74.121.52.67 | mail5493.marketing.newage.com | — |
| 74.121.52.68 | mail4091.azurolongo.mkt4688.com | — |
| 74.121.52.69 | mail4092.viceroyhotelgroup.mkt4689.com | — |
| 74.121.52.70 | mail5492.education-affiliates.mkt6090.com | — |
| 74.121.52.71 | — | — |
| 74.121.52.72 | — | — |
| 74.121.52.73 | mail4096.firecoltd.mkt4693.com | — |
| 74.121.52.74 | mail4097.dgitl.mkt4694.com | — |
| 74.121.52.75 | mail6529.casualdininggroup.mkt7128.com | — |
| 74.121.52.76 | mail5487.cedarfinance.mkt6085.com | — |
| 74.121.52.77 | mail4100.baybreakers.mkt4697.com | — |
| 74.121.52.78 | mail5922.b2btransact.mkt6521.com | — |
| 74.121.52.79 | mail4102.viva.mkt4699.com | — |
| 74.121.52.80 | mail15675.email.forwardblue.org | — |
| 74.121.52.81 | mail4104.astechnosoft.mkt4701.com | — |
| 74.121.52.82 | mail4105.certification.mkt4702.com | — |
| 74.121.52.83 | mail4106.playmillion.mkt4703.com | — |
| 74.121.52.84 | mail4107.macmillan-macsci.mkt4704.com | — |
| 74.121.52.85 | mail6534.viliving.mkt7133.com | — |
| 74.121.52.86 | mail4109.umn.mkt4706.com | — |
| 74.121.52.87 | mail4110.ifusionmarketing.mkt4707.com | — |
| 74.121.52.88 | mail4111.ritterim.mkt4708.com | — |
| 74.121.52.89 | — | — |
| 74.121.52.90 | mail4113.arlingtonlenssupply.mkt4710.com | — |
| 74.121.52.91 | mail4114.boardroom.mkt4711.com | — |
| 74.121.52.92 | mail4115.boardroom.mkt4712.com | — |
| 74.121.52.93 | mail4116.boardroom.mkt4713.com | — |
| 74.121.52.94 | mail4117.boardroom.mkt4714.com | — |
| 74.121.52.95 | mail4118.boardroom.mkt4715.com | — |
| 74.121.52.96 | mail4119.boardroom.mkt4716.com | — |
| 74.121.52.97 | mail4120.boardroom.mkt4717.com | — |
| 74.121.52.98 | mail4121.boardroom.mkt4718.com | — |
| 74.121.52.99 | mail4122.boardroom.mkt4719.com | — |
| 74.121.52.100 | mail4123.boardroom.mkt4720.com | — |
| 74.121.52.101 | mail4124.boardroom.mkt4721.com | — |
| 74.121.52.102 | mail4125.boardroom.mkt4722.com | — |
| 74.121.52.103 | mail4126.boardroom.mkt4723.com | — |
| 74.121.52.104 | mail4127.boardroom.mkt4724.com | — |
| 74.121.52.105 | mail4128.boardroom.mkt4725.com | — |
| 74.121.52.106 | mail5913.hy-vee.mkt6512.com | — |
| 74.121.52.107 | mail15676.email.forwardblue.org | — |
| 74.121.52.108 | mail4131.zondervancorporation.mkt4728.com | — |
| 74.121.52.109 | mail4132.taylorwimpey.mkt4729.com | — |
| 74.121.52.110 | mail15677.email.forwardblue.org | — |
| 74.121.52.111 | mail4134.biblegateway.mkt4731.com | Yes |
| 74.121.52.112 | mail4135.sp.dstvcomms.com | — |
| 74.121.52.113 | mail4136.multichoicetechops-t.mkt4733.com | — |
| 74.121.52.114 | mail5909.igodirect.mkt6508.com | — |
| 74.121.52.115 | mail4138.portico.mkt4735.com | — |
| 74.121.52.116 | mail4139.elcid.mkt4736.com | — |
| 74.121.52.117 | mail4140.accountantsworld.mkt4737.com | — |
| 74.121.52.118 | mail4141.fashionandyou.mkt4738.com | — |
| 74.121.52.119 | mail4142.email.redcats.se | — |
| 74.121.52.120 | mail5716.kensington.mkt6315.com | — |
| 74.121.52.121 | mail4144.mts-sensorsdivision.mkt4741.com | — |
| 74.121.52.122 | mail4145.cbsinteractive.mkt4742.com | — |
| 74.121.52.123 | mail4146.rumbleentertainment.mkt4743.com | — |
| 74.121.52.124 | mail6522.welovesalt.mkt7121.com | — |
| 74.121.52.125 | mail4148.e.daflores.com | — |
| 74.121.52.126 | mail4149.jwt.mkt4746.com | — |
| 74.121.52.127 | mail6117.heineken-uk.mkt6716.com | — |
| 74.121.52.128 | mail4151.pearsonaustralia.mkt4748.com | — |
| 74.121.52.129 | mail4152.elseviersingapore.mkt4749.com | — |
| 74.121.52.130 | — | — |
| 74.121.52.131 | mail5483.ufx-news2.com | — |
| 74.121.52.132 | mail4155.javelinstrategy.mkt4752.com | — |
| 74.121.52.133 | mail4156.pointsoflight.mkt4753.com | — |
| 74.121.52.134 | mail5482.skar.mkt6080.com | — |
| 74.121.52.135 | mail15444.e.armstrongcomfort.com | — |
| 74.121.52.136 | mail6968.homechoice.mkt7567.com | — |
| 74.121.52.137 | mail5903.mail.vasque.com | — |
| 74.121.52.138 | mail5481.west-central-inc.mkt6079.com | — |
| 74.121.52.139 | mail4162.lumens.mkt4759.com | — |
| 74.121.52.140 | mail4163.stonyfield.mkt4760.com | — |
| 74.121.52.141 | mail4164.collecta.mkt4761.com | — |
| 74.121.52.142 | mail6722.daubalderney.mkt7321.com | — |
| 74.121.52.143 | mail5479.blenz.mkt6077.com | — |
| 74.121.52.144 | mail4167.maxwell.mkt4764.com | — |
| 74.121.52.145 | mail4168.thomascook.mkt4765.com | — |
| 74.121.52.146 | mail4169.t-signonsandiego.mkt4766.com | — |
| 74.121.52.147 | mail4170.signonsandiego.mkt4767.com | — |
| 74.121.52.148 | mail4171.paid.mkt4768.com | — |
| 74.121.52.149 | mail4172.cspnet.mkt4769.com | — |
| 74.121.52.150 | mail4173.silverpop.org | — |
| 74.121.52.151 | mail6115.vancity.mkt6714.com | — |
| 74.121.52.152 | mail7577.transac.jplocalbusiness.co.uk | — |
| 74.121.52.153 | mail4176.quantumloyalty.mkt4773.com | — |
| 74.121.52.154 | mail4177.drs-ts.mkt4774.com | — |
| 74.121.52.155 | mail4178.lsc-clientsender.mkt4775.com | — |
| 74.121.52.156 | mail4179.mxg2.mkt4776.com | — |
| 74.121.52.157 | mail4180.mxg.mkt4777.com | — |
| 74.121.52.158 | mail4181.ccg.mkt4778.com | — |
| 74.121.52.159 | mail4182.mail.dreamland.be | — |
| 74.121.52.160 | mail4183.mail.collectandgo.be | — |
| 74.121.52.161 | mail4184.mail.colruyt.lu | — |
| 74.121.52.162 | mail4185.mail.colruyt.be | — |
| 74.121.52.163 | — | — |
| 74.121.52.164 | mail4187.mail.colruyt.fr | — |
| 74.121.52.165 | mail4188.mail.dats24.be | — |
| 74.121.52.166 | mail4189.mail.colruytgroup.com | — |
| 74.121.52.167 | — | — |
| 74.121.52.168 | mail4191.mail.collishop.fr | — |
| 74.121.52.169 | mail4192.dreambaby.mkt4789.com | — |
| 74.121.52.170 | mail4193.mail.solucious.be | — |
| 74.121.52.171 | mail4194.mail.cru.be | — |
| 74.121.52.172 | — | — |
| 74.121.52.173 | mail4196.edwards.mkt4793.com | — |
| 74.121.52.174 | mail4197.edwards.mkt4794.com | — |
| 74.121.52.175 | mail4198.edwards.mkt4795.com | — |
| 74.121.52.176 | mail4199.metlifecbf.mkt4796.com | — |
| 74.121.52.177 | mail4200.casinorewards.mkt4797.com | — |
| 74.121.52.178 | mail5894.regis-management.mkt6493.com | — |
| 74.121.52.179 | mail4202.viacord.mkt4799.com | — |
| 74.121.52.180 | mail4203.greenmountain.mkt4800.com | — |
| 74.121.52.181 | mail5622.greenpeace-nordic.mkt6221.com | — |
| 74.121.52.182 | mail4205.northernreflection.mkt4802.com | — |
| 74.121.52.183 | mail6514.s.suppmeonline.com | — |
| 74.121.52.184 | mail4207.ravemobilesafety.mkt4804.com | — |
| 74.121.52.185 | mail4208.littlestarmedia.mkt4805.com | — |
| 74.121.52.186 | mail4209.wintingo.mkt4806.com | — |
| 74.121.52.187 | mail6942.liquidint.mkt7541.com | — |
| 74.121.52.188 | mail4211.sankynet.mkt4808.com | — |
| 74.121.52.189 | mail4212.visitscotland.mkt4809.com | — |
| 74.121.52.190 | mail4213.dtgdealer.com | — |
| 74.121.52.191 | mail4214.consider-toyota.com | — |
| 74.121.52.192 | mail4215.beachesmailings.mkt4812.com | — |
| 74.121.52.193 | mail4216.grandpineapplemailings.mkt4813.com | — |
| 74.121.52.194 | mail4217.ttifloorcare.mkt4814.com | — |
| 74.121.52.195 | mail4218.mailsouthinc.mkt4815.com | — |
| 74.121.52.196 | mail4219.thealchemediaproject.mkt4816.com | — |
| 74.121.52.197 | — | — |
| 74.121.52.198 | mail4221.heifer.mkt4818.com | — |
| 74.121.52.199 | mail5881.bravelets.mkt6480.com | — |
| 74.121.52.200 | mail4223.pins.mkt4820.com | — |
| 74.121.52.201 | mail5880.casina.mkt6479.com | — |
| 74.121.52.202 | mail4225.lsc-clientsender.mkt4822.com | — |
| 74.121.52.203 | mail4226.bingosoft.mkt4823.com | — |
| 74.121.52.204 | mail4227.zones.mkt4824.com | — |
| 74.121.52.205 | mail4228.lucbrainhive.mkt4825.com | — |
| 74.121.52.206 | mail4229.rbff.mkt4826.com | — |
| 74.121.52.207 | mail4230.landhgroup.mkt4827.com | — |
| 74.121.52.208 | mail4231.sungardps.mkt4828.com | — |
| 74.121.52.209 | mail4232.healthintegrated.mkt4829.com | — |
| 74.121.52.210 | mail4233.reinsw.mkt4830.com | — |
| 74.121.52.211 | mail4234.pro-football.mkt4831.com | — |
| 74.121.52.212 | mail6510.harpercollins.mkt7109.com | — |
| 74.121.52.213 | mail4236.ascent-advisor.mkt4833.com | — |
| 74.121.52.214 | mail4237.email.perfectinfo.com | — |
| 74.121.52.215 | mail4238.omcaltd.mkt4835.com | — |
| 74.121.52.216 | mail7021.londonconsulting.mkt7620.com | — |
| 74.121.52.217 | mail5607.remedyhealthmedia.mkt6206.com | — |
| 74.121.52.218 | mail5869.email.britt.com | — |
| 74.121.52.219 | mail4242.babsoncollege.mkt4839.com | — |
| 74.121.52.220 | mail6993.mkt7592.com | — |
| 74.121.52.221 | mail4244.timewarnercable.mkt4841.com | — |
| 74.121.52.222 | mail4245.dysonuk.mkt4842.com | — |
| 74.121.52.223 | mail4246.gvingmachine.mkt4843.com | — |
| 74.121.52.224 | mail15581.mail.citizensalliancepac.com | — |
| 74.121.52.225 | mail6971.engage.fordshuttleservice.com | — |
| 74.121.52.226 | mail4249.themxgroup.mkt4846.com | — |
| 74.121.52.227 | mail4250.transact.officeworks.com.au | — |
| 74.121.52.228 | mail4251.t-silverpopaustralia.mkt4848.com | — |
| 74.121.52.229 | mail6185.mkt6784.com | — |
| 74.121.52.230 | mail4253.globalred.mkt4850.com | — |
| 74.121.52.231 | mail4254.hks-belfercenter.mkt4851.com | — |
| 74.121.52.232 | mail4255.nationalcathedral.mkt4852.com | — |
| 74.121.52.233 | mail4256.regionsbank.mkt4853.com | — |
| 74.121.52.234 | mail4257.emails.regions.com | — |
| 74.121.52.235 | mail6989.payoneerraf.mkt7588.com | — |
| 74.121.52.236 | mail4259.morris.mkt4856.com | — |
| 74.121.52.237 | mail5559.netspendcorporation.mkt6158.com | — |
| 74.121.52.238 | mail4261.email.diningclubgroup.co.uk | — |
| 74.121.52.239 | mail4262.reflexblu.mkt4859.com | — |
| 74.121.52.240 | mail6665.unicefusa.mkt7264.com | — |
| 74.121.52.241 | mail4264.sandals.mkt4861.com | — |
| 74.121.52.242 | mail4265.besmith.mkt4862.com | — |
| 74.121.52.243 | — | — |
| 74.121.52.244 | mail4267.northamericaopg.mkt4864.com | — |
| 74.121.52.245 | mail4268.lsc-certifytax.mkt4865.com | — |
| 74.121.52.246 | mail4269.odeonbet.mkt4866.com | — |
| 74.121.52.247 | — | — |
| 74.121.52.248 | mail4271.threedeepcomm.mkt4868.com | — |
| 74.121.52.249 | — | — |
| 74.121.52.250 | — | — |
| 74.121.52.251 | mail5742.junctioninsurance-t.mkt6341.com | — |
| 74.121.52.252 | mail6726.dafabetpromo.com | — |
| 74.121.52.253 | mail6826.etnetera.mkt7425.com | — |
| 74.121.52.254 | mail4277.officeworks.mkt4874.com | — |
| 74.121.52.255 | — | — |