~/dnsniffer/tlds/security·rank #995
▸ How many .security domains are registered?
1,078
active .security domains as of .
# rank #995 of all TLDs ▼ 6 in 30d# all records held: 1,200# snapshots: 60
~/tlds/security/history·active domains
1,078
active .security domains on 2026-10-15 · ▲ +354 (+48.90%) since 2025-06-30
# y-axis starts at 681.52, 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
▲ +2.76%
+29 domains
90 days
▲ +6.73%
+68 domains
1 year
▲ +45.28%
+336 domains
# faq
- ? How many .security domains are registered?
- There are 1,078 active .security domains as of October 15, 2026, according to DNSniffer’s daily count of zone-file and certificate-transparency records.
- ? Is .security growing or shrinking?
- .security has grown by 45.28% over the last year (+336 domains).
- ? Where does the .security 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 .security 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.