~/dnsniffer/tlds/co.us·rank #2,348
▸ How many .co.us domains are registered?
42
active .co.us domains as of .
# rank #2,348 of all TLDs ▲ 7 in 30d# all records held: 43# snapshots: 20
~/tlds/co.us/history·active domains
42
active .co.us domains on 2026-09-05 · ▲ +28 (+200.00%) since 2025-06-30
# y-axis starts at 10.64, 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
▲ +0.00%
+0 domains
90 days
▲ +0.00%
+0 domains
1 year
▲ +5.00%
+2 domains
# faq
- ? How many .co.us domains are registered?
- There are 42 active .co.us domains as of September 5, 2026, according to DNSniffer’s daily count of zone-file and certificate-transparency records.
- ? Is .co.us growing or shrinking?
- .co.us has grown by 5.00% over the last year (+2 domains).
- ? Where does the .co.us 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.us 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.