Oi headquarters details
- City
- Rio de Janeiro
- State / region
- Rio de Janeiro
- Country
- Brazil
- Phone
- +55 21 3131 2918
- Founded
- 1998
- Website
- oi.com.br
- Stock
- NASDAQ: OIBR.C
- linkedin.com/company/oioficial
Location map
Open in Google MapsAll Oi office locations
| City | State / region | Country | Type |
|---|---|---|---|
| Rio de Janeiro HQ | Rio de Janeiro | Brazil | Headquarters |
Showing the headquarters of 162 recorded locations. See every location in GraphIQ →
About Oi
Oi (NASDAQ: OIBR.C) is headquartered in Rio de Janeiro, Rio de Janeiro, Brazil. Founded in 1998, the company has 162 recorded locations and employs approximately 18,947 people worldwide.
Where is Oi's main office?
Oi's main headquarters office is located at Rio de Janeiro, Rio de Janeiro, Brazil. This is the company's primary corporate address.
Oi regional offices
Beyond its headquarters in Rio de Janeiro, Oi has recorded locations in Brazil.
Oi contact information
The main switchboard for Oi headquarters can be reached at +55 21 3131 2918. Official website: oi.com.br.
What does Oi do?
Oi (Portuguese for "Hi"), formerly known as Telemar, is the largest fixed telephone operator and the fourth mobile telephone operator in Brazil, being the third largest telecommunication company in Latin America. It is headquartered in Rio de Janeiro.
Oi competitors & similar companies
Frequently asked questions
Where is Oi headquarters?
Oi's headquarters is located at Rio de Janeiro, Rio de Janeiro, Brazil.
How many offices does Oi have?
GraphIQ records 162 locations for Oi, as of October 2026.
When was Oi founded?
Oi was founded in 1998 and employs approximately 18,947 people.
What is Oi's phone number?
The main phone number for Oi headquarters is +55 21 3131 2918.
How many employees does Oi have?
Oi has approximately 18,947 employees (GraphIQ estimate, 2026).
Is Oi a public company?
Yes. Oi is publicly traded on NASDAQ under the ticker OIBR.C.