Teresina, Brazil

Teresina is located in Piauí, Brazil at coordinates -5.0892° S, -42.8019° W. With a population of approximately 871,126, Teresina is a growing urban center in Piauí. While smaller than the country's largest cities, it plays an important regional role in Brazil's digital landscape, with connectivity options that continue to improve year over year.

The city operates in the America/Fortaleza timezone (UTC-3). Near the equator, Teresina has relatively consistent daylight hours year-round, which contributes to more evenly distributed internet traffic patterns compared to cities at higher latitudes. Internet connectivity in Teresina is primarily served by Vivo, Claro, Oi. Residents and visitors can use our speed test to check their connection quality from Teresina.

If you're connecting to the internet from Teresina, your IP address will typically show a location within Piauí. IP geolocation in mid-sized cities like Teresina is usually accurate to the regional level, though some connections may resolve to a nearby larger city depending on how the ISP routes traffic. Use our IP lookup tool to check the accuracy for your specific connection.

With a population under one million, Teresina faces different connectivity dynamics than Brazil's largest metros. Broadband penetration in Teresina has improved significantly in recent years, though speeds and availability can vary between neighborhoods. Cable and DSL remain common, with fiber deployments concentrated in central districts.

The main ISPs in Teresina are Vivo, Claro, and Oi. With fewer providers competing in a smaller market, it's especially important to verify actual speeds against advertised plans. Use our speed test to measure your real download and upload speeds from Teresina.

IP addresses assigned to users in Teresina are allocated by Vivo, Claro, and Oi, each of which manages its own blocks of IPv4 and IPv6 addresses. In Latin America, IP address blocks are managed by LACNIC (Latin American and Caribbean Internet Addresses Registry). The registry assigns ranges to ISPs like Vivo and Claro, enabling geolocation services to map IPs to cities like Teresina.

When you connect to the internet in Teresina, your ISP assigns you either a dynamic or static IP address. In smaller cities, ISPs sometimes allocate IP blocks that cover a broader geographic area, which can cause your IP to geolocate to a nearby larger city rather than Teresina specifically. Check your current IP and its associated location using our My IP Address tool, or look up any IP with our IP lookup.

Brazil's Lei Geral de Proteção de Dados (LGPD) provides GDPR-like privacy protections for internet users in Teresina. ISPs like Vivo must comply with data processing rules and user consent requirements. Still, your IP address and online activity remain visible to websites without additional privacy measures.

To protect your privacy while browsing from Teresina, consider using a trusted VPN service that encrypts your traffic and masks your real IP address. Even in Teresina, public Wi-Fi at local cafes and public spaces can expose your data. A VPN adds a critical layer of encryption between your device and the internet. After connecting to your VPN, verify it's working properly with our VPN leak test — this checks for DNS, WebRTC, and IPv6 leaks that could expose your real Teresina IP address. You can also check your browser fingerprint to see how uniquely identifiable your browser is, even when using a VPN.