Cisco IronPort

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Mailbox provider detected by primary MX target (lowest-preference record). Counts reflect Tranco top-1M domains with at least one MX record on snapshot 2026-05-04.

2,842domains with this primary MX
0.43%of 662,839 domains with MX
137distinct TLDs
2026-05-04snapshot date

TLD Distribution (top 30 of 137)

com — 1,333 (46.9%)
org — 182 (6.4%)
de — 101 (3.6%)
edu — 86 (3.0%)
fr — 66 (2.3%)
net — 65 (2.3%)
gov — 60 (2.1%)
es — 55 (1.9%)
ca — 52 (1.8%)
it — 50 (1.8%)
co.il — 49 (1.7%)
com.br — 42 (1.5%)
co.jp — 36 (1.3%)
co.uk — 35 (1.2%)
at — 34 (1.2%)
be — 31 (1.1%)
com.au — 26 (0.9%)
ch — 26 (0.9%)
nl — 21 (0.7%)
cat — 17 (0.6%)
ie — 17 (0.6%)
au — 16 (0.6%)
in — 16 (0.6%)
il — 15 (0.5%)
pt — 14 (0.5%)
com.mx — 13 (0.5%)
se — 13 (0.5%)
dk — 12 (0.4%)
co.th — 11 (0.4%)
jp — 11 (0.4%)

Domain Sample (top 100)

nginx.comintuit.comf5.comwebex.comebay.commeraki.comcisco.comopendns.commailchimp.comxerox.comebay.co.ukdeloitte.comebay.demoneycontrol.commakemytrip.comebay.itacs.orgfao.orgasahi.comkohls.comutah.educorebridgefinancial.comumd.eduey.comharman.comaarp.orgnasdaq.comwalgreens.combu.educancer.orgduosecurity.comstarbucks.comcaltech.edunhl.comsantander.com.bruwaterloo.cacreditkarma.comemxdgt.comebay.catcgplayer.comseagate.comsplunk.comebay.com.auuq.edu.auprogressive.comqvc.comctrls.ininfobip.comebay.frswarovski.comstlouisfed.orgjustgiving.comrand.orgparis.frcapgemini.comgoindigo.ingoibibo.commako.co.ilappdynamics.comfourseasons.combmwgroup.comves.ioqvc.degencat.catwilliamhill.comnavyfederal.orgbancsabadell.comjnj.comalz.orgallianz.comtchibo.deqoo10.jpthescore.commicrochip.comwesterndigital.comsignalfx.combancoestado.clamtrak.comdesjardins.commeinbezirk.atbezeq.co.ilmichaelkors.comboots.comclaro.com.brqvc.jpjreast.co.jpdxc.comhsn.comvcu.educathaypacific.comalarm.comiphmx.commsstate.eduplarium.comnec.comsandisk.comebay.esmadrid.orgbluebeam.comrenault.com

Showing 100 of 2,842 domains. Sample sorted by Tranco rank.