.bio domain statistics
72,328 domains were registered under .bio at its latest check (Oct 9, 2026), placing it #80 of 1,079. Since its first check on Feb 24, 2026 it has grown by 34.0% (+18,371 domains). At its latest check it changed by +143 domains over 56 days, about +0.0% a week, the #116 fastest growth among 162 large TLDs.
About the .bio extension
The registry behind .bio is Identity Digital Domains Limited. The extension was delegated to the root zone on Jun 2, 2014, 12.4 years ago. Its ICANN registry agreement was signed on Mar 6, 2014, 88 days before launch.
Registry details from ICANN's gTLD list.
Other extensions run by Identity Digital Domains Limited
Identity Digital Domains Limited operates 24 of the TLDs RootFetch tracks, holding 7,107,744 domains in total. .bio is #6 of them by size, with 1.0% of the group's domains. The largest are listed below.
How .bio compares
In domain count, .bio outranks 93% of the extensions RootFetch follows. Since Feb 24 it has changed +34.0%, against a median of +3.5% for large TLDs tracked as long, which puts it ahead of 91% of them. Its latest weekly rate, +0.0%, is faster than 28% of large TLDs right now. Among the 10 TLDs closest to it in size, .bio grew faster than 7; the fastest of that group was .best at +127.7%.
Biggest moves
Of 9 changes between checks, 6 were gains, 2 were losses and 1 showed no change. The biggest gain was +6,613 domains (+10.1%) between Jul 3, 2026 and Aug 14, 2026. The biggest drop was −19 (−0.0%) between Mar 1, 2026 and Mar 2, 2026.
.bio growth trend
.bio accounts for 0.08% of all 89M domains RootFetch counts. Over the 227 days from Feb 24 to Oct 9 it averaged +0.91% a week, or +81 domains a day. Its strongest month on record was August 2026 (+6,613); its weakest was March 2026 (−15). If the latest rate held for 30 days, .bio would reach about 72,405 domains (a straight-line projection, not a forecast).
.bio domains by month
| Month | Domains | Change |
|---|---|---|
| October 2026 | 72,328 | +143 |
| August 2026 | 72,185 | +6,613 |
| July 2026 | 65,572 | +6,541 |
| June 2026 | 59,031 | +4,974 |
| March 2026 | 54,057 | −15 |
| February 2026 | 54,072 | – |
Every check
| Date | Domains | Change | Growth | Window | Severity |
|---|---|---|---|---|---|
| Oct 9, 2026 | 72,328 | +143 | +0.2% | 56 days | |
| Aug 14, 2026 | 72,185 | +6,613 | +10.1% | 42 days | |
| Jul 3, 2026 | 65,572 | +6,541 | +11.1% | 28 days | |
| Jun 5, 2026 | 59,031 | +4,974 | +9.2% | 94 days | |
| Mar 3, 2026 | 54,057 | +13 | +0.0% | 1 day | |
| Mar 2, 2026 | 54,044 | −19 | −0.0% | 1 day | |
| Mar 1, 2026 | 54,063 | −9 | −0.0% | 3 days | |
| Feb 26, 2026 | 54,072 | +115 | +0.2% | 1 day | |
| Feb 25, 2026 | 53,957 | 0 | +0.0% | 1 day | |
| Feb 24, 2026 | 53,957 | – | – | first check |
Questions about .bio
How many .bio domains are there?
72,328, according to the .bio zone file on Oct 9, 2026.
Can anyone register a .bio domain?
Yes, unless Identity Digital Domains Limited sets its own limits. .bio is a generic extension, not a company-only brand TLD.
Who runs the .bio domain extension?
The registry operator is Identity Digital Domains Limited.
When was .bio created?
It was delegated on Jun 2, 2014.
Is .bio growing?
.bio went from 53,957 domains on Feb 24, 2026 to 72,328 on Oct 9, 2026, a change of +34.0%. Its latest rate is about +0.0% a week.
How big is the .bio domain extension compared to others?
.bio is number 80 in size among tracked extensions. Its nearest neighbours are .news, .cam, .network.