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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.

143,345domains with this primary MX
21.63%of 662,839 domains with MX
644distinct TLDs
2026-05-04snapshot date

TLD Distribution (top 30 of 644)

com — 74,958 (52.3%)
org — 6,692 (4.7%)
net — 4,399 (3.1%)
io — 3,831 (2.7%)
com.br — 3,356 (2.3%)
in — 2,349 (1.6%)
co — 2,076 (1.4%)
co.uk — 1,911 (1.3%)
ai — 1,801 (1.3%)
de — 1,635 (1.1%)
it — 1,556 (1.1%)
jp — 1,329 (0.9%)
fr — 1,231 (0.9%)
com.au — 1,179 (0.8%)
ru — 1,163 (0.8%)
nl — 1,158 (0.8%)
pl — 1,062 (0.7%)
id — 911 (0.6%)
ca — 833 (0.6%)
app — 812 (0.6%)
es — 792 (0.6%)
co.jp — 777 (0.5%)
br — 767 (0.5%)
cl — 722 (0.5%)
vn — 680 (0.5%)
cz — 637 (0.4%)
ua — 597 (0.4%)
ro — 594 (0.4%)
edu — 592 (0.4%)
se — 576 (0.4%)

Domain Sample (top 100)

Showing 100 of 143,345 domains. Sample sorted by Tranco rank.