~/dnsniffer/tlds/rio·rank #1,106
▸ How many .rio domains are registered?
721
active .rio domains as of .
# rank #1,106 of all TLDs ▼ 20 in 30d# all records held: 1,107# snapshots: 59
~/tlds/rio/history·active domains
721
active .rio domains on 2026-10-14 · ▲ +179 (+33.03%) since 2025-06-30
# y-axis starts at 519.92, not zero - domain counts move by fractions of a percent a day. Dashed segments are estimated: reconstructed from certificate first-seen dates before daily snapshots began, not measured on the day.
# change over time
30 days
▼ -0.14%
-1 domains
90 days
▲ +11.44%
+74 domains
1 year
▲ +32.05%
+175 domains
# faq
- ? How many .rio domains are registered?
- There are 721 active .rio domains as of October 14, 2026, according to DNSniffer’s daily count of zone-file and certificate-transparency records.
- ? Is .rio growing or shrinking?
- .rio has grown by 32.05% over the last year (+175 domains).
- ? Where does the .rio domain count come from?
- We ingest ICANN CZDS zone files and Certificate Transparency logs continuously and snapshot the per-TLD count once a day. A .rio domain is counted as active if it appeared in a zone file in the last 2 days, or - where no zone file is published - if a certificate was issued for it in the last 12 months.