Choose .io when
- APIs and developer platforms
- Open-source projects
- Technical startups
- Infrastructure products
.io domain search
Find a .io name that feels native to software
Generate ideas, check an exact name or research a shortlist—all scoped to .io.
Live .io search
Find your strongest available .io
Results remain on this page and stay scoped to .io. Availability and final checkout price are confirmed by the registrar.
About this extension
What is .io?
.io is the country-code top-level domain for the British Indian Ocean Territory. Its short spelling and long use by software companies have made it a recognisable technology signal, but it remains a ccTLD rather than a generic technology category.
- Type
- Country-code TLD
- IANA type
- Country-code TLD
- Sponsoring organisation
- Internet Computer Bureau Limited
The ccTLD for the British Indian Ocean Territory is widely used by technology companies; check current local policy at the registrar.
Current classification in the IANA Root Zone Database.
IANA records the sponsoring organisation; retail registration is handled by registrars.
The short answer
Is .io a good domain extension?
Choose .io when a technical audience is central and the shorter name is worth the extension premium. Keep a backup plan for renewal and policy changes because the registry is a territory-based ccTLD.
Consider another extension when
- Your audience expects a mainstream consumer address
- The price is materially higher than a relevant alternative
- You need a country-specific trust signal elsewhere
Research brief
The .io facts that change the decision
This page separates registry policy, public market evidence and registrar pricing. A sample is labeled as a sample; a rule is labeled as a rule; and a checkout quote is never presented as a registry statistic.
IANA type
Country-code TLD
Current classification in the IANA Root Zone Database.
IANA .io delegation recordSponsoring organisation
Internet Computer Bureau Limited
IANA records the sponsoring organisation; retail registration is handled by registrars.
IANA .io delegation recordIANA registration service
nic.io
IANA lists this registration-service destination for .io. It identifies a registry service, not a quote for a specific domain name.
IANA .io delegation recordRegistry lookup endpoint
whois.nic.io
IANA publishes these .io registry lookup endpoints. A lookup does not settle final availability, rights or checkout price.
IANA .io delegation recordRoot-zone registration date
1997-09-16
IANA records this date for .io in the DNS root. It is not the launch date of every registry service or a measure of a particular domain's age.
IANA .io delegation recordRegistration model
First come, first served
NIC.IO says applicants may reside in any legal jurisdiction; the extension remains the ccTLD for the British Indian Ocean Territory.
NIC.IO domain rulesDNS at registration
Two working nameservers
NIC.IO requires at least two nameservers when a second-level domain request is submitted.
NIC.IO domain rulesLaunch path
.io → certificate → product
Use .io as a clear product signal, then verify certificates, redirects and every hostname before launch.
Registry evidence
Registration facts for .io
A registry has not published a comparable public registration series for this extension. Rather than estimate a total, this page surfaces the most useful verified facts for checking eligibility, registration and lifecycle details.
Verified registry fact
Registration model
First come, first served
NIC.IO says applicants may reside in any legal jurisdiction; the extension remains the ccTLD for the British Indian Ocean Territory.
NIC.IO domain rulesVerified registry fact
DNS at registration
Two working nameservers
NIC.IO requires at least two nameservers when a second-level domain request is submitted.
NIC.IO domain rulesVerified registry fact
IANA type
Country-code TLD
Current classification in the IANA Root Zone Database.
IANA .io delegation recordFamiliar in the wild
Who uses .io?
These are recognizable examples, not endorsements or traffic rankings. The useful pattern is how broadly the extension works across industries.
Availability without guesswork
How to find a strong available .io
Treat availability as the start of the decision, not the finish. A usable name also needs to be easy to communicate, defensible and fairly priced.
- 01
Start with a name that earns .io
Short .io names are heavily searched by technical teams. Test a clear verb-plus-noun compound and say it aloud so listeners do not confuse the ending with .com.
- 02
Search the exact label first
Keep the search scoped to this extension, then compare the exact label with closely related endings before accepting a spelling compromise.
- 03
Check rights and pronunciation
An available result is not trademark clearance. Say the name aloud, check local implications and review the registrar’s final eligibility rules.
Pricing explained
What does a .io domain cost?
The useful number is the full cost of ownership, not the largest promotional figure on a registrar banner.
Lowest verified row: $38.99 for year one
Renews from $69.99
This is the lowest verified provider row, not a recommendation. Verified 2026-09-04. Compare every available registrar below; a provider gets a price row after its current quote is collected or approved in admin.
RegistrarRegisterRenewTransfer
NameSiloSource price table
Register$38.99Renew$69.99Transfer$53.49
Standard names only. Prices were source-checked on September 4, 2026; promotional rates, taxes, ICANN fees and premium-name pricing can change at checkout.
Compare the full .io ownership cost
Compare first-year, renewal and transfer prices: .io promotions vary widely and some registrars price it above common gTLDs. Check the exact label for premium status.
Registration options
Where to register a .io
Compare the final registration, renewal and transfer terms. We put the provider best aligned with this market first, but the choice remains yours.
Compare Bluehost, Namecheap, NameSilo, HostGator and Domain.com. Prices appear only when a provider's current quote is verified, so a missing row never becomes a made-up number.
NameSilo
Register $38.99 · renew $69.99
Verified 2026-09-04
Bluehost
Our primary global registration option for generic extensions.
Namecheap
A second checkout option for comparing registration and renewal terms.
HostGator
A domain and hosting option; confirm the current renewal price at checkout.
Domain.com
Search and register on Domain.com's official domain page; confirm current availability and terms there.
Make the tradeoff visible
.io compared with common alternatives
| Extension | Recognition | Availability | Strongest fit | Watch for |
|---|---|---|---|---|
| .io | Strong with developers | Category-dependent | Software and APIs | ccTLD policy and renewal pricing |
| .com | Very high | Crowded | Broad commercial and global brands | Premium or awkward remaining names |
| .org | High | Often better | Mission-led and community work | May imply a public-interest purpose |
AI naming tools
Use AI for ideas—not fake availability
Copy a focused prompt into your preferred AI assistant, then paste the names it finds into FlashDomains Bulk Search. Test the whole shortlist together—AI can explore language, but live registry and registrar signals confirm domains.
Generate .io name ideas
Create 30 short .io names for a developer product that [does X]. Prioritise pronounceable compounds, avoid forced spellings and explain why each ending reinforces a technical audience.
Score a shortlist for clarity
Score these possible .io names: [paste shortlist]. Assess pronunciation, spelling, category fit, unintended meanings and sentence flow. Do not claim availability, trademark clearance or monetary value. Return the strongest three with risks.
Create clean variations
The preferred label [name] is unavailable as a .io. Suggest concise variations that preserve its meaning and suit developer tools, apis and technical products. Reject forced spellings, hyphens and numbers. Do not claim availability.
These prompts help generate and evaluate .io ideas. They do not confirm domain availability, trademark status or price.
Direct answers
.io questions
Updated August 15, 2026. Time-sensitive prices and availability must be rechecked at the registrar.
What is a .io domain?
.io is the country-code top-level domain for the British Indian Ocean Territory. Its short spelling and long use by software companies have made it a recognisable technology signal, but it remains a ccTLD rather than a generic technology category.
How much does a .io domain cost?
There is no universal retail price. Registrars set registration, renewal and transfer pricing, and some names are premium. Compare current rows for the exact name before checkout.
Is FlashDomains the .io registrar?
No. FlashDomains compares availability signals and routes registration actions to a registrar with the searched name filled in. The registrar confirms availability, price and eligibility at checkout.
Is .io a technology TLD?
It is a country-code TLD for the British Indian Ocean Territory that became popular in technology. IANA classifies it as a ccTLD, not a generic technology TLD.
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