Domain Name Requirements for .CO
When choosing your .CO domain, keep these rules in mind:
Length
Must be at least 1 character long.
Cannot exceed 63 characters (not including .CO).
Allowed Characters
Letters (a–z)
Numbers (0–9)
Hyphens (-), with restrictions:
Cannot start or end with a hyphen.
Cannot use two or more consecutive hyphens in the 3rd and 4th positions (e.g., “ab--cd.co” is not allowed).
No other special characters are permitted.
Internationalized Domain Names (IDNs)
You can use IDN characters to include non-English letters such as accents or characters from other scripts.
Key Takeaway
Your .CO domain can be short or long, letters or numbers, and may include hyphens (with restrictions). If needed, you can also register domains with international characters.