.bio gTLD
The .bio TLD is a generic top-level domain intended for individuals, organizations, and businesses connected to life sciences, health, sustainability, organic products, and biological innovation. While open to general registration, it carries special implications for organic food and agricultural sectors due to European regulatory concerns.
Open for general registration; however, registrants using .bio for organic food products may be subject to compliance expectations aligned with EU standards.
.bio Domain Overview
The .bio extension is a generic top-level domain (gTLD) in the Domain Name System (DNS). It is managed by Identity Digital Limited. .bio was introduced in 2014. There are currently 59,694 domains registered under this extension. Registration prices start from USD 5.57 - 74.57. DNSSEC adoption stands at 5.7%.
Registration Info
Price range based on 3 registrars. Actual prices may vary.
Security Features
- DNSSEC
- CAA Record Support
Where to Register a .bio Domain — Price Comparison
Compare .bio domain registration and renewal prices across 3 registrars. Prices are in USD and updated daily.
| Registrar | Registration | Renewal | Transfer |
|---|---|---|---|
| dynadot Cheapest | $5.57 | $60.14 | $60.14 |
| porkbun | $5.66 | $58.19 | $58.19 |
| resellerclub | $74.57 | $89.31 | $74.57 |
Prices checked April 7, 2026. Prices exclude ICANN fees where applicable and may vary by registrar promotions or contract terms.
What Is the History of .bio?
The .bio domain was delegated to Starting Dot Limited on May 15, 2014, after passing ICANN’s new gTLD application process. In August 2016, Afilias acquired Starting Dot and took over registry operations. Identity Digital Limited became the registry operator in 2019 after acquiring Afilias’s TLD portfolio. A notable point of contention arose from the European Union’s concern that '.bio' could be misleading for organic food labeling, leading to internal compliance guidelines for registrants in that space.
Did you know?
The .bio TLD serves a specific purpose in the domain ecosystem, providing users with clear context about the websites using this extension.
What Is .bio Used For?
The .bio TLD is commonly used for the following purposes:
Organic food and agriculture brands
Biotechnology and life science companies
Environmental and sustainability organizations
Healthcare and clinical research institutions
Personal branding for scientists and biologists
Eco-friendly product lines
Popular Websites
How Many .bio Domains Are Registered?
Total Registrations
59,694
DNSSEC Adoption
5.7%
Alternative TLDs
If .bio doesn't meet your needs, consider these alternatives:
How Does .bio Compare?
| Metric | Value |
|---|---|
| Extension | .bio |
| Type | Generic TLD (gTLD) |
| Total Registrations | 59,694 |
| DNSSEC Adoption | 5.7% |
| Registration Price | USD 5.57 - 74.57 |
| Renewal Price | USD 58.19 - 89.31 |
| Registry Operator | Identity Digital Limited |
| Introduced | 2014-05-15 |
| Restrictions | Open for general registration; however, registrants using .bio for organic food products may be subject to compliance expectations aligned with EU standards. |
How Available Are .bio Domain Names?
Registration density analysis for .bio domains by character length. Currently 49,494 domains are registered across all lengths.
Total Registered
49.5K
Peak Saturation
65.4%
1-char names
DNSSEC Adoption
5.7%
Top Provider
Cloudflare
| Length | Registered | % Full | Density |
|---|---|---|---|
| 1 char | 17 | 65.4% | |
| 2 chars | 135 | 20.0% | |
| 3 chars | 3,976 | 22.6% | |
| 4 chars | 5,167 | 1.1% | |
| 5 chars | 6,130 | 0.05% | |
| 6 chars | 6,855 | <0.01% | |
| 7 chars | 6,762 | <0.01% | |
| 8 chars | 5,919 | <0.01% | |
| 9 chars | 4,976 | <0.01% | |
| 10 chars | 4,180 | <0.01% | |
| 11 chars | 3,029 | <0.01% | |
| 12 chars | 2,348 | <0.01% |
Top DNS Providers
Updated daily from zone file analysis. Alpha density = registered / 26^length.
Compare across all TLDs →How Do I Register a .bio Domain?
Eligibility
No geographic or professional restrictions. Registrants should avoid misleading claims about organic status if operating in EU-regulated markets.
Open Registration
The .bio TLD is available for registration through accredited domain registrars.
Registration Process
- Choose an accredited domain registrar that offers .bio domains
- Check domain availability using the registrar's search tool
- Complete the registration process and provide required information
- Pay the registration fee (typically USD 5.57 - 74.57)
- Manage your domain settings through your registrar's control panel
.bio vs Related Domain Extensions
How does .bio compare to similar top-level domains? This comparison covers pricing, type, and availability to help choose the right domain extension.
View the full TLD Directory to browse all 1,900+ top-level domains with pricing, registration density analysis, and DNSSEC adoption rates.
Frequently Asked Questions
How Is This .bio Data Compiled?
DNS Checker maintains a comprehensive TLD directory covering all 1,900+ active top-level domains. The data on this page combines multiple authoritative sources to provide information not found in standard TLD listings.
Zone File Analysis
Domain registration counts and density analysis are computed daily from TLD zone files, providing accurate registration statistics rather than estimates.
DNSSEC Adoption Tracking
DNSSEC deployment percentages are measured by scanning actual DNS records across all registered domains in each TLD zone.
Registrar Price Monitoring
Registration, renewal, and transfer prices are checked hourly across multiple accredited registrars and compared automatically.
Provider Market Share
DNS provider distribution is calculated from nameserver records, showing which hosting providers serve the most domains in each TLD.
Use DNS Checker tools to inspect any .bio domain: run a full DNS health check, check DNS propagation, look up WHOIS records, or verify email authentication.
Disclaimer: The information on this page is sourced from IANA, ICANN, and respective registry operator publications, then structured and formatted with the assistance of AI. While accuracy is a priority, details such as pricing, registration requirements, and policies may change. Always verify with the official registry or an accredited registrar before making registration decisions.