List of .co Zone Domains

.co Domain Zone Datasets

Download a .co domain name list or a full dataset with DNS, server IP, emails, and phone numbers.

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Zone TLD: .CO

Zone type: country-code (ccTLD)

Update frequency: monthly (last updated on September 10, 2026)

Total domains monitored: 850,957

Tracked domains included in datasets: 850,957

Datasets available:
Basic Domain List (download sample 💾)
Detailed Domain Dataset (download sample 💾)

The vertical axis uses only this chart's value range so small changes over time are easier to see.

Dataset type
choose a type		 Last updated
next update: tomorrow 		Total domains
in current dataset		 Emails
crawled from websites 		Phones
crawled from websites
Basic Domain List September 10, 2026 850,957 --- --- Download GET
Detailed Domain Dataset September 10, 2026 850,957 YES YES Download GET

How many .co domains are there?

As of September 10, 2026, the .co domain list contains 850,957 tracked .co domains, 0.233% of all domains tracked by NetAPI, which makes .co the #42 largest of 1,584 zones. The list grew by +16,992 (+2.04%) over the last 30 days and by +180,381 (+26.9%) year over year.

850,957
tracked .co domains
+16,992
30-day change (+2.04%)
+47,745
90-day change (+5.94%)
+26.9%
1-year growth (+180,381)
#42 of 1,584
zones by size
0.233%
of all tracked domains

Newly discovered .co domains are added to the list daily, with a full refresh every one to two months (how updates work). 7,875 .co domains are in the free NetAPI Top 1M. See the most popular .co websites. 629 .co domains are currently listed in the compromised domains feed (0.074% of the zone). See the TLD abuse report.

Frequently Asked Questions

See our FAQ for more answers.

Can I download sample datasets for the .co zone?

Yes. Download a sample .co domain list or a sample .co dataset.

What is a basic domain list, and how does it differ from a detailed dataset?

Both cover the same 850,957 registered domain names in the .co 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.

How often are .co datasets updated?

The .co zone is a country-code (ccTLD) zone, and its registry zone file is not directly accessible. NetAPI discovers .co domains through large-scale crawls: newly discovered domains are added to the list daily, and the full dataset is rebuilt every one to two months. See how updates work.

Can I download only newly registered .co domains?

Not for this zone. Newly discovered .co domains are merged into the active list daily, but there is no separate new-domains file for .co. Daily new-domains lists exist for the zones marked as updated daily in the datasets catalog.

What format and size is the file?

Every .co 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 .co basic list is about 4.8 MB and the detailed dataset about 11 MB. 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.

Related domain zones

Other zones you can download alongside .co — lists and datasets in the same format.

Similar in size

Largest country-code zones

Largest generic zones

Additional .CO Zone / Registry Information

Zone Registry: .CO Internet S.A.S.

Dispute Policy: link

Registry Policy: link

Data Privacy Policy: link

The .co was primarily established on December 24, 1991, as the country-code domain but is now also included in generic top-level domains due to its global usage. It is administered by the popular agency .CO Internet S.A.S.

The .co domain allows you to build your online presence in the Colombian market. It also targets a Worldwide audience without any geographical restrictions. The term .co stands for corporation or company, and that’s why different startups have adopted this domain extension for convenience and versatility.

It has over 2 million registered domains and gained massive popularity over the years. .co has various second-level domains that were implemented by the Colombian government in 2010. The second and third-level domains can be used globally and are generally available to anyone. Commercial businesses can adopt the .com.co second-level domain, while others can register for the third-level domains.

Compromised .co Domains

Live compromised domain count per day (last 30 days).

The list of compromised domains in the .co zone can be downloaded here.

The full list of compromised domains can be downloaded here.

Chart Y-axis is scaled to the data range to show day-to-day changes (not from zero).

Based on this dataset and daily threat-intelligence signals. Domains may be listed after observed phishing, malware, spam, botnet, or similar activity; inclusion does not imply malicious intent by the owner, registrar, registry, or host. Updated daily; figures may change as new data arrives.

Questions? See our FAQ or contact us.

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