239 Country Code: Sao Tome and Principe (+239)
Country code 239 (+239) belongs to Sao Tome and Principe. Sao Tome and Principe uses the international dialing code +239, assigned by the International Telecommunication Union (ITU) under the E.164 standard. The ISO 3166-1 alpha-2 code is ST.
You will see the same code written several ways depending on origin: +239 (universal + prefix, works from mobile), 00239 (from countries that use 00 as their international exit code — most of Europe, Asia, and Latin America), 011 239 (from the US and Canada), 0011 239 (from Australia), or the bare 239. All refer to the same Sao Tome and Principe country code. Note: 239 is not a US area code — US area codes are also 3 digits but +239 is the international dialing code for Sao Tome and Principe, not a domestic US destination.
Below you will find the number format, trunk prefix, major city area codes, and dialing facts specific to Sao Tome and Principe (+239).
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Did You Get a Call from +239? Here's What That Means
Any incoming call that displays +239 followed by more digits is originating from Sao Tome and Principe. The caller is dialing you from a Sao Tome and Principe-registered phone number — either a landline or a mobile on a Sao Tome and Principe carrier.
Common reasons people receive calls from +239:
- -Family or friends in Sao Tome and Principe calling from a local number
- -Business contacts at Sao Tome and Principe-based companies
- -Customer support agents working from a Sao Tome and Principe call center
- -Travel-related calls (hotels, airlines, tour operators)
- -Less commonly, robocalls or scam calls that have spoofed a +239 number — if the call is unsolicited, do not return it without verifying the source
Sao Tome and Principe Phone Number Format
International Format Example
Sao Tome and Principe does not use a trunk prefix, so domestic and international formats are effectively the same — just prepend +239.
Calling Sao Tome and Principe Successfully: Common Mistakes & Best Practices
Most failed calls to Sao Tome and Principe come from one of four mistakes, not from network problems. The most common is mishandling the country code itself: Sao Tome and Principe uses +239 with no trunk prefix to remove, so you dial it as-is. The most frequent error is adding a leading 0 by habit — there is none in the Sao Tome and Principe number plan.
The second is misreading the area code on landline numbers — Sao Tome and Principe numbers may have variable formatting depending on the carrier and city, so confirm the area code with the recipient before dialing. The third is dialing during off-hours — Sao Tome and Principe uses local business hours and consumer phones are usually answered between 8 AM and 9 PM local time. The fourth and most expensive mistake is assuming your US carrier's WiFi calling feature makes the call cheap. It does not — see WiFi calling vs VoIP for international calls for why.
For scam-call awareness: +239 is the legitimate Sao Tome and Principe country code, and most unsolicited calls from +239 numbers are legitimate calls from Sao Tome and Principe-based businesses, hospitals, family members, or call centers serving US customers. Caller-ID spoofing exists, so if a call from a +239 number claims to be from a US government agency, your bank, or the IRS, hang up and call the agency back on its published number. Real authorities never demand payment over the phone.
When you are ready to place a call, the cheapest reliable route is to dial +239 from your browser using Kinvo — no app, no carrier add-on, and the per-minute rate is shown before you connect so there are no bill surprises. The browser approach also works from any laptop, tablet, or phone you happen to have access to, which matters when you're traveling, using a work device, or borrowing someone else's computer.
Call Sao Tome and Principe from Your Browser
Call any Sao Tome and Principe number (+239) directly from Chrome, Firefox, Safari, or Edge. No install required. Use it in under 2 minutes.
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Frequently Asked Questions: Sao Tome and Principe Country Code
Which country is country code 239?
Country code 239 belongs to Sao Tome and Principe. The full international dialing code is +239, also written as 00239 from countries using 00 as their international exit code (Europe, most of Asia, Latin America), 011 239 from the US and Canada, or +239 from any mobile phone.
What is the country code for Sao Tome and Principe?
+239 is the international dialing code for Sao Tome and Principe, assigned by the ITU under E.164. The ISO 3166-1 alpha-2 code is ST. Equivalent forms — 00239, 011 239, +239, and 239 — all refer to the same Sao Tome and Principe country code.
Is 239 a US area code?
No. 239 is the international country code for Sao Tome and Principe, not a US area code. US area codes are also 3 digits but they are domestic North American Numbering Plan codes — to reach Sao Tome and Principe from the US, dial +239 or 011 239 followed by the local number.
Can I call Sao Tome and Principe from my browser?
Yes. Kinvo connects calls to Sao Tome and Principe via WebRTC directly from Chrome, Firefox, Safari, or Edge. No app download. Sign up, add credits from $5, and dial +239 followed by the local number.