~/dnsniffer/tlds/co·rank #14
▸ How many .co domains are registered?
2,829,793
active .co domains as of .
# rank #14 of all TLDs# all records held: 3,561,732# snapshots: 60
~/tlds/co/history·active domains
2,829,793
active .co domains on 2026-10-15 · ▲ +2,588,454 (+1,072.54%) since 2025-06-30
# y-axis starts at 0, 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
▲ +5.11%
+137,460 domains
90 days
▲ +4.24%
+115,104 domains
1 year
▲ +44.88%
+876,571 domains
# faq
- ? How many .co domains are registered?
- There are 2,829,793 active .co domains as of October 15, 2026, according to DNSniffer’s daily count of zone-file and certificate-transparency records.
- ? Is .co growing or shrinking?
- .co has grown by 44.88% over the last year (+876,571 domains).
- ? Where does the .co 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 .co 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.