.co domains and subdomains
The GetDomainLists release contains 2,241,842 registrable .co domains and 3,319,514 subdomains under them — names only, as historical observations, not a list of live websites.
The subdomain file has 1.5 .co names for each registrable .co domain in the domain file, against 3.4 across all top-level domains. This is a ratio of file rows, not a typical count for one site: many domains have no subdomains in the file. The most common tracked leftmost label is www (1,447,406 names, 43.6% of .co subdomains). 6.4% of .co domains sit under a second-level suffix such as com.co.
.co domain names
How the 2,241,842 registrable .co names are built (the label before the suffix):
| Label type | Domains | Share |
|---|---|---|
| Letters only | 1,982,290 | 88.4% |
| Letters and digits | 129,931 | 5.8% |
| Digits only | 34,270 | 1.5% |
| Hyphenated | 91,291 | 4.1% |
| Internationalized (xn--) | 4,060 | 0.2% |
Public suffixes under .co:
| Suffix | Domains | Share |
|---|---|---|
co | 2,098,300 | 93.6% |
com.co | 128,383 | 5.7% |
edu.co | 7,004 | 0.3% |
gov.co | 4,438 | 0.2% |
net.co | 2,502 | 0.1% |
org.co | 923 | <0.1% |
.co subdomains
Depth counts the labels to the left of the registrable domain.
| Depth | Subdomains | Share |
|---|---|---|
| 1 (a.example.co) | 2,432,881 | 73.3% |
| 2 | 306,904 | 9.2% |
| 3 | 134,606 | 4.1% |
| 4 or more | 445,123 | 13.4% |
Tracked leftmost labels (name patterns, not confirmed services):
| Label | Subdomains | Share |
|---|---|---|
www | 1,447,406 | 43.6% |
mail | 58,842 | 1.8% |
api | 34,627 | 1.0% |
webmail | 32,186 | 1.0% |
cpanel | 31,717 | 1.0% |
webdisk | 30,911 | 0.9% |
autodiscover | 24,846 | 0.7% |
cpcontacts | 23,888 | 0.7% |
Getting only .co
The release is sold as two complete files covering every TLD in it, not as per-TLD lists. To keep only .co, filter the files you download, for example:
zgrep -E '\.co$' getdomainlists-2026-09-28-domains.txt.gz > co-domains.txt zgrep -E '\.co$' getdomainlists-2026-09-28-subdomains.txt.gz > co-subdomains.txt
Try the format first with a free sample of 1,000 .co domains (plain text, no sign-up). Both full files are $9 once, with 30 days to download.
Limits
- Historical observations collected up to this release (updated 28 September 2026); not proof that a name is registered, resolves or hosts a website today.
- Coverage is incomplete and uneven; these counts describe this release, not the whole .co namespace.
- Names only: no owner, contact, hosting or registration-date data.