~/dnsniffer/tlds/ca.us·rank #1,507
▸ How many .ca.us domains are registered?
196
active .ca.us domains as of .
# rank #1,507 of all TLDs ▲ 9 in 30d# all records held: 203# snapshots: 20
~/tlds/ca.us/history·active domains
196
active .ca.us domains on 2026-09-05 · ▲ +158 (+415.79%) since 2025-06-30
# y-axis starts at 18.92, 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
▼ -0.51%
-1 domains
90 days
▲ +0.51%
+1 domains
1 year
▲ +1.55%
+3 domains
# faq
- ? How many .ca.us domains are registered?
- There are 196 active .ca.us domains as of September 5, 2026, according to DNSniffer’s daily count of zone-file and certificate-transparency records.
- ? Is .ca.us growing or shrinking?
- .ca.us has grown by 1.55% over the last year (+3 domains).
- ? Where does the .ca.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 .ca.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.