.book domain statistics
On Aug 7, 2026 the .book zone held 1 domains, which makes it #1,033 in RootFetch's ranking. Since its first check on Mar 7, 2026 it has held steady.
About the .book extension
Amazon Registry Services, Inc. runs .book, which went live in the root zone on Dec 5, 2015 (10.8 years ago). Its ICANN registry agreement was signed on Aug 27, 2015, 100 days before launch.
Registry details from ICANN's gTLD list.
Other extensions run by Amazon Registry Services, Inc.
Amazon Registry Services, Inc. operates 51 of the TLDs RootFetch tracks, holding 74,068 domains in total. .book is #23 of them by size, with 0.0% of the group's domains. The largest are listed below.
How .book compares
.book is bigger than 4% of the TLDs in this dataset. .book beat 0 of the 10 similar-sized TLDs on growth; the fastest of that group was .xerox at +0.0%.
Biggest moves
Of 2 changes between checks, 0 were gains, 0 were losses and 2 showed no change.
.book growth trend
That is a 0.00% slice of the 89M domains in the whole dataset. Over the 153 days from Mar 7 to Aug 7 it averaged +0.00% a week, or 0 domains a day.
.book domains by month
| Month | Domains | Change |
|---|---|---|
| August 2026 | 1 | 0 |
| May 2026 | 1 | 0 |
| March 2026 | 1 | – |
Every check
| Date | Domains | Change | Growth | Window | Severity |
|---|---|---|---|---|---|
| Aug 7, 2026 | 1 | 0 | +0.0% | 70 days | |
| May 29, 2026 | 1 | 0 | +0.0% | 83 days | |
| Mar 7, 2026 | 1 | – | – | first check |
Questions about .book
How many .book domains are there?
As of Aug 7, 2026, there are 1 registered .book domains.
Can anyone register a .book domain?
.book is open to the public through registrars; it is not a Specification 13 brand TLD. Check Amazon Registry Services, Inc.'s policies for any restrictions.
Who runs the .book domain extension?
Amazon Registry Services, Inc..
When was .book created?
.book went live in the DNS root on Dec 5, 2015.
Is .book growing?
.book went from 1 domains on Mar 7, 2026 to 1 on Aug 7, 2026, a change of +0.0%.
How big is the .book domain extension compared to others?
It ranks #1,033 by domain count. Its nearest neighbours are .tkmaxx, .winners, .xerox.