| 74.121.53.0 | — | — |
| 74.121.53.1 | mta4601.silverpop.net | — |
| 74.121.53.2 | mta4602.silverpop.net | — |
| 74.121.53.3 | mta4603.silverpop.net | — |
| 74.121.53.4 | mta4604.silverpop.net | — |
| 74.121.53.5 | mta4605.silverpop.net | — |
| 74.121.53.6 | mta4606.silverpop.net | — |
| 74.121.53.7 | mta4607.silverpop.net | — |
| 74.121.53.8 | mta4608.silverpop.net | — |
| 74.121.53.9 | mta4609.silverpop.net | — |
| 74.121.53.10 | mta4610.silverpop.net | — |
| 74.121.53.11 | mta4611.silverpop.net | — |
| 74.121.53.12 | mta4612.silverpop.net | — |
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| 74.121.53.16 | mail15206.x2-13-02-custom-ah.main-baba.pl | — |
| 74.121.53.17 | mail15205.13-02-custom-ah.main-baba.pl | — |
| 74.121.53.18 | mail5726.plowandhearth.mkt6325.com | — |
| 74.121.53.19 | mail5727.plowandhearth.mkt6326.com | — |
| 74.121.53.20 | mail5728.plowandhearth.mkt6327.com | — |
| 74.121.53.21 | mail5729.plowandhearth.mkt6328.com | — |
| 74.121.53.22 | mail15204.x1-12-02-ah-custom.main-baba.pl | — |
| 74.121.53.23 | mail6627.loebenterprises-t.mkt7226.com | — |
| 74.121.53.24 | mail5732.btgoptions.mkt6331.com | — |
| 74.121.53.25 | mail5733.firstclassmedia.mkt6332.com | — |
| 74.121.53.26 | — | — |
| 74.121.53.27 | mail5754.gta-travel.mkt6353.com | — |
| 74.121.53.28 | mail7016.collegeweeklive.mkt7615.com | — |
| 74.121.53.29 | mail7015.totalbet.mkt7614.com | — |
| 74.121.53.30 | mail7014.betjoy.mkt7613.com | — |
| 74.121.53.31 | mail5758.hubzuusa.mkt6357.com | — |
| 74.121.53.32 | mail5759.rcu.mkt6358.com | — |
| 74.121.53.33 | mail5760.bridgepub.mkt6359.com | — |
| 74.121.53.34 | mail5761.monetized.mkt6360.com | — |
| 74.121.53.35 | mail5762.progressplay-t.mkt6361.com | — |
| 74.121.53.36 | mail5763.progressplay.mkt6362.com | — |
| 74.121.53.37 | mail5764.autobytel.mkt6363.com | — |
| 74.121.53.38 | mail5765.dolce.mkt6364.com | — |
| 74.121.53.39 | mail5766.notify.solavei.com | — |
| 74.121.53.40 | mail5767.ahm.honda.mkt6366.com | — |
| 74.121.53.41 | mail5768.123devis.mkt6367.com | — |
| 74.121.53.42 | mail5769.nbf.mkt6368.com | — |
| 74.121.53.43 | mail5770.nbf.mkt6369.com | — |
| 74.121.53.44 | mail5771.intern.mkt6370.com | — |
| 74.121.53.45 | mail5772.int.mkt6371.com | — |
| 74.121.53.46 | mail5773.momcorps.mkt6372.com | — |
| 74.121.53.47 | mail5774.careerstep.mkt6373.com | — |
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| 74.121.53.49 | mail5776.boschptd.mkt6375.com | — |
| 74.121.53.50 | mail5777.parelli.mkt6376.com | — |
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| 74.121.53.53 | mail5780.vsnek.mkt6379.com | — |
| 74.121.53.54 | mail5781.e.democraticvictoryfund.org | — |
| 74.121.53.55 | mail5782.t.cleanchoiceenergy.com | — |
| 74.121.53.56 | mail5783.bluebayinvest.mkt6382.com | — |
| 74.121.53.57 | mail5784.lasikvisioninstitute.mkt6383.com | — |
| 74.121.53.58 | mail5785.newsletters.wmagazine.com | — |
| 74.121.53.59 | mail5786.icgroup.mkt6385.com | — |
| 74.121.53.60 | mail5787.ismgcorp.mkt6386.com | — |
| 74.121.53.61 | mail5788.tradeadvisor.mkt6387.com | — |
| 74.121.53.62 | mail5789.nhunited.mkt6388.com | — |
| 74.121.53.63 | mail5790.ntara.mkt6389.com | — |
| 74.121.53.64 | mail5791.exportmart.mkt6390.com | — |
| 74.121.53.65 | mail5792.e.parkseed.com | — |
| 74.121.53.66 | mail5793.bata.mkt6392.com | — |
| 74.121.53.67 | mail5794.ganz.mkt6393.com | — |
| 74.121.53.68 | mail5795.exportmart.mkt6394.com | — |
| 74.121.53.69 | mail5796.o2ebrands.mkt6395.com | — |
| 74.121.53.70 | mail5797.youmoveme.mkt6396.com | — |
| 74.121.53.71 | mail5798.astmailers.mkt6397.com | — |
| 74.121.53.72 | mail5799.astechmailing.mkt6398.com | — |
| 74.121.53.73 | mail5800.newpointmedia.mkt6399.com | — |
| 74.121.53.74 | mail5801.gbgroupdlc.mkt6400.com | — |
| 74.121.53.75 | mail5802.jhancock.mkt6401.com | — |
| 74.121.53.76 | mail5869.email.stonyfield.com | — |
| 74.121.53.77 | mail5804.bdsupport.mkt6403.com | — |
| 74.121.53.78 | mail5805.shoemetro.mkt6404.com | — |
| 74.121.53.79 | mail5806.butigo-t.mkt6405.com | — |
| 74.121.53.80 | mail5807.vivnetworks-csob.mkt6406.com | — |
| 74.121.53.81 | mail5808.eservice.thomaswoodenrailway.com | — |
| 74.121.53.82 | mail5809.service.thomaswoodenrailway.com | — |
| 74.121.53.83 | mail5810.sfx-resorts.mkt6409.com | — |
| 74.121.53.84 | mail5811.beyondemail.mkt6410.com | — |
| 74.121.53.85 | mail5812.nobia-t.mkt6411.com | — |
| 74.121.53.86 | mail5813.hitentertainment.mkt6412.com | — |
| 74.121.53.87 | mail5814.e.kidsii.com | — |
| 74.121.53.88 | mail7025.ehsmail.mkt7624.com | — |
| 74.121.53.89 | mail5816.thejockeyclub.mkt6415.com | — |
| 74.121.53.90 | mail5817.natmedia.mkt6416.com | — |
| 74.121.53.91 | mail6694.bestfriends.mkt7293.com | — |
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| 74.121.53.93 | mail5820.e.vandykes.com | — |
| 74.121.53.94 | mail5821.online-media.mkt6420.com | — |
| 74.121.53.95 | mail5822.hobbylobby.mkt6421.com | — |
| 74.121.53.96 | mail6926.account-sandalsselect.mkt7525.com | — |
| 74.121.53.97 | mail5824.hcpmessage.mkt6423.com | — |
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| 74.121.53.99 | mail5826.gecweb.mkt6425.com | — |
| 74.121.53.100 | mail5827.gecweb.mkt6426.com | — |
| 74.121.53.101 | mail5828.membersexclusive4.mkt6427.com | — |
| 74.121.53.102 | mail5829.seedhawk.mkt6428.com | — |
| 74.121.53.103 | — | — |
| 74.121.53.104 | mail5831.massmutual.mkt6430.com | — |
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| 74.121.53.106 | mail5833.leverx.mkt6432.com | — |
| 74.121.53.107 | mail5834.redwingshoes.mkt6433.com | — |
| 74.121.53.108 | mail5835.souq-t.mkt6434.com | — |
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| 74.121.53.111 | mail5838.accessconsciousness.mkt6437.com | — |
| 74.121.53.112 | mail5839.drvservices.mkt6438.com | — |
| 74.121.53.113 | mail5840.bluminformatica.mkt6439.com | — |
| 74.121.53.114 | mail5841.horsesmouth.mkt6440.com | — |
| 74.121.53.115 | — | — |
| 74.121.53.116 | mail5843.clickmein.mkt6442.com | — |
| 74.121.53.117 | mail5844.equitylifestyle.mkt6443.com | — |
| 74.121.53.118 | mail5845.aimcoproperties.mkt6444.com | — |
| 74.121.53.119 | mail5846.e.jacksonandperkins.com | — |
| 74.121.53.120 | mail5847.e.waysidegardens.com | — |
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| 74.121.53.124 | mail5851.squawalpine-ryansolutions.mkt6450.com | — |
| 74.121.53.125 | — | — |
| 74.121.53.126 | mail15657.sac.rmged.com | — |
| 74.121.53.127 | mail5854.nationtraffic.mkt6453.com | — |
| 74.121.53.128 | mail5855.lead-works.mkt6454.com | — |
| 74.121.53.129 | mail5856.ryansolutions.mkt6455.com | — |
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| 74.121.53.133 | — | — |
| 74.121.53.134 | — | — |
| 74.121.53.135 | mail5862.allianz-assistance.mkt6461.com | — |
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| 74.121.53.137 | mail15261.x2dkimtest0304.daddy-baba.pl | — |
| 74.121.53.138 | mail7032.email.psbd.fi | — |
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| 74.121.53.140 | mail5867.influence.mkt6466.com | — |
| 74.121.53.141 | mail5928.tthmedia.mkt6527.com | — |
| 74.121.53.142 | mail5929.tthmedia.mkt6528.com | — |
| 74.121.53.143 | mail5930.tthmedia.mkt6529.com | — |
| 74.121.53.144 | mail5931.tthmedia.mkt6530.com | — |
| 74.121.53.145 | mail5932.tthmedia.mkt6531.com | — |
| 74.121.53.146 | mail5933.tthmedia.mkt6532.com | — |
| 74.121.53.147 | mail5934.hubba.mkt6533.com | — |
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| 74.121.53.149 | mail6990.harlequin.mkt7589.com | — |
| 74.121.53.150 | mail5937.pepperi.mkt6536.com | — |
| 74.121.53.151 | mail5938.mattressfirm.mkt6537.com | — |
| 74.121.53.152 | — | — |
| 74.121.53.153 | mail5940.royalcoffee.mkt6539.com | — |
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| 74.121.53.156 | mail5943.rsacanadadev.mkt6542.com | — |
| 74.121.53.157 | mail5944.t-titlenine.mkt6543.com | — |
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| 74.121.53.159 | mail5946.t-aetna.mkt6545.com | — |
| 74.121.53.160 | mail5947.aetna.mkt6546.com | — |
| 74.121.53.161 | mail5948.medseek.mkt6547.com | — |
| 74.121.53.162 | mail5949.t-spokeo.mkt6548.com | — |
| 74.121.53.163 | mail5950.spokeo.mkt6549.com | — |
| 74.121.53.164 | — | — |
| 74.121.53.165 | mail5952.whistler-ryansolutions.mkt6551.com | — |
| 74.121.53.166 | mail5953.wisertogether.mkt6552.com | — |
| 74.121.53.167 | mail5954.pngaming.mkt6553.com | — |
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| 74.121.53.169 | mail5956.tinkertailor.mkt6555.com | — |
| 74.121.53.170 | mail5957.lls.mkt6556.com | — |
| 74.121.53.171 | mail5958.identicomdigital.mkt6557.com | — |
| 74.121.53.172 | mail5959.periscope.mkt6558.com | — |
| 74.121.53.173 | mail5960.gb2bc.mkt6559.com | — |
| 74.121.53.174 | — | — |
| 74.121.53.175 | mail5962.portraitinnovations.mkt6561.com | — |
| 74.121.53.176 | mail5963.pageantmedia.mkt6562.com | — |
| 74.121.53.177 | mail6976.panorama.mkt7575.com | — |
| 74.121.53.178 | mail5965.nelly.mkt6564.com | — |
| 74.121.53.179 | mail6975.moneycorp.mkt7574.com | — |
| 74.121.53.180 | mail5967.kcm.mkt6566.com | — |
| 74.121.53.181 | mail5968.cspbm.mkt6567.com | — |
| 74.121.53.182 | mail5969.primegaming.mkt6568.com | — |
| 74.121.53.183 | mail5970.profiunion.mkt6569.com | — |
| 74.121.53.184 | mail5971.coresystems.mkt6570.com | — |
| 74.121.53.185 | mail5972.ups.mkt6571.com | — |
| 74.121.53.186 | mail5973.alaskaairvacations.com | — |
| 74.121.53.187 | mail5974.hotelplan-t.mkt6573.com | — |
| 74.121.53.188 | mail5975.ondalek.mkt6574.com | — |
| 74.121.53.189 | mail5976.marketing.jjkeller.com | — |
| 74.121.53.190 | mail5977.dante.mkt6576.com | — |
| 74.121.53.191 | mail5978.membersexclusive3.mkt6577.com | — |
| 74.121.53.192 | mail5979.membersexclusive2.mkt6578.com | — |
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| 74.121.53.194 | mail5981.ultradenttransactional.mkt6580.com | — |
| 74.121.53.195 | mail5982.anakinteractive-t.mkt6581.com | — |
| 74.121.53.196 | mail5983.myfunplay.mkt6582.com | — |
| 74.121.53.197 | mail5984.tax.uline.com | — |
| 74.121.53.198 | mail5985.t-ufxmarkets.mkt6584.com | — |
| 74.121.53.199 | mail15500.mail.outside.travel | — |
| 74.121.53.200 | mail5987.maynardmalone.mkt6586.com | — |
| 74.121.53.201 | mail5988.finestra.mkt6587.com | — |
| 74.121.53.202 | mail5989.aspensnowmass.mkt6588.com | — |
| 74.121.53.203 | mail5990.acmetools.mkt6589.com | — |
| 74.121.53.204 | mail5991.insidengo.mkt6590.com | — |
| 74.121.53.205 | mail5992.sourcebooks.mkt6591.com | — |
| 74.121.53.206 | mail5993.datawise.mkt6592.com | — |
| 74.121.53.207 | mail5994.4cite.mkt6593.com | — |
| 74.121.53.208 | mail6056.gbgmarketing.mkt6655.com | — |
| 74.121.53.209 | mail6057.dominion.mkt6656.com | — |
| 74.121.53.210 | mail6058.beatthebrochure.mkt6657.com | — |
| 74.121.53.211 | mail6055.l.efset.org | — |
| 74.121.53.212 | mail6059.pge.mkt6658.com | — |
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| 74.121.53.214 | mail6061.stoklasa.mkt6660.com | — |
| 74.121.53.215 | mail15285.0416-ah-custom.daddy-baba.pl | — |
| 74.121.53.216 | mail6063.dominion.mkt6662.com | — |
| 74.121.53.217 | mail6064.streethouse.mkt6663.com | — |
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| 74.121.53.220 | mail6068.easytobook.mkt6667.com | — |
| 74.121.53.221 | mail6069.holidayplanet.mkt6668.com | — |
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| 74.121.53.223 | mail6071.springfree.mkt6670.com | — |
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| 74.121.53.225 | mail6073.ryansolutions.mkt6672.com | — |
| 74.121.53.226 | mail6927.mail.redwingshoe.com | — |
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| 74.121.53.230 | mail6078.mkt6677.com | — |
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| 74.121.53.232 | mail6080.impact-ps.mkt6679.com | — |
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| 74.121.53.237 | mail6084.telecompros.mkt6683.com | — |
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| 74.121.53.241 | mail6091.qbridgecig2.mkt6690.com | — |
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| 74.121.53.247 | — | — |
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| 74.121.53.255 | — | — |