List of .rio Zone Domains
.rio Domain Zone Datasets
Download a .rio domain name list or a full dataset with DNS, server IP, emails, and phone numbers.
Zone TLD: .RIO
Zone type: generic (gTLD)
Update frequency: daily (last updated on September 12, 2026)
Total domains monitored: 915
Live domains included in datasets: 767
Datasets available:
Basic Domain List (download sample 💾)
Detailed Domain Dataset (download sample 💾)
Filters: Active domains, New domains (last 24h)
How many .rio domains are registered?
As of September 12, 2026, the .rio domain list contains 767 active .rio domains, <0.001% of all domains tracked by NetAPI, which makes .rio the #773 largest of 1,584 zones. 1 new .rio domains were registered in the last 24 hours and 14 over the last 30 days. Net of expired and deleted domains, the zone changed by +1 (+0.131%) in 30 days and by +78 (+11.3%) year over year.
The .rio domain list and the detailed dataset above are refreshed daily, so these figures move with the zone. 13 .rio domains are in the free NetAPI Top 1M. See the Top 1M list.
Frequently Asked Questions
See our FAQ for more answers.
Can I download sample datasets for the .rio zone?
Yes. Download a sample .rio domain list or a sample .rio dataset.
What is a basic domain list, and how does it differ from a detailed dataset?
Both cover the same 767 registered domain names in the .rio zone. A basic list is one domain name per line in a gzip CSV. A detailed dataset adds DNS servers, server IP, hostname, emails, phone numbers, and more. See the dataset format details.
What are active and new domains?
Datasets for .rio are updated daily. Active domains are all currently registered names in the zone. New domains are names added in the last 24 hours.
Can I download only newly registered .rio domains?
Yes. The New domains list contains only the .rio domains registered in the last 24 hours and is rebuilt every day.
To download it manually, sign in and click the number in the New domains column of the
download table on this page (the Download button next to it gets the full list of active domains).
Through the API, call
/api2/?method=download&zone_tld=rio&dataset_type=list&filter_type=new&token=YOUR_API_TOKEN
(dataset_type=dataset for the detailed dataset); see the API documentation.
What format and size is the file?
Every .rio domain list and dataset is a CSV file compressed with gzip (.csv.gz):
the basic list has one domain name per line, the detailed dataset has one row per domain with the columns described in the
dataset format details.
Compressed, the current .rio basic list is about 4 KB and the detailed dataset about 14 KB.
Any archiver opens gzip files, for example the free
7-Zip on Windows,
and the API can also serve the files uncompressed (format=plain).
How do I automate daily downloads?
Schedule automatic downloads through the API. See the API documentation for authentication and endpoints.
Are emails and phone numbers available for every domain?
No. We collect contact details from public websites when available. Many domains have no published email or phone, and we do not guarantee these fields on every row. Do not use the data for unsolicited bulk outreach.
Additional .RIO Zone / Registry Information
Registration is open to anyone worldwide, although the extension is intended for businesses, organisations, events and residents connected to Rio; the city administration and local companies use it for regional branding.
Top DNS providers / .rio domain zone
Share of .rio domains by nameserver provider.
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