São Tomé & Príncipe country code, +239 explained.
Everything you need to call São Tomé & Príncipe with Twiching — full dialing format, step-by-step guide, and Tier-1 CLI routes that land every call.
São Tomé & Príncipe
São Tomé · Africa
· COUNTRY INFO · VERIFIED
- ISO Alpha-2
- ST
- Capital
- São Tomé
- Region
- Africa
- Timezone
- UTC+0
· DIALING GUIDE · VERIFIED
FULL DIAL FORMAT
011 · +239 · XXXXXXX
How São Tomé & Príncipe numbers break down
A complete number to São Tomé & Príncipe follows this pattern. Twiching adds the exit and country codes automatically when you dial from the app.
EXIT CODE
Dial from the US/Canada to leave the country.
COUNTRY CODE
Routes the call directly into São Tomé & Príncipe.
LOCAL NUMBER
The subscriber's local number.
COMPLETE NUMBER FORMAT
011 · +239 · XXXXXXX
São Tomé & Príncipe on the map
São Tomé · Africa
ROUTE
Tier-1 Direct
CLI
Verified
ASR
60%+ min
How to call São Tomé & Príncipe
Click any step — watch the full dial string build piece by piece.
FULL NUMBER FORMAT
011 · +239 · XXXXXXX
Twiching automatically adds the exit and country codes — just enter the local number.
São Tomé & Príncipe —
connected across every carrier.
191
Countries in directory
SÃO TOMÉ & PRÍNCIPE INCLUDED
99.97%
Call delivery rate
STIR/SHAKEN
500+
Carrier interconnects
TIER-1 DIRECT
60%+
Guaranteed ASR
REAL-TIME ROUTING
São Tomé & Príncipe
Africa · ST
São Tomé & Príncipe numbering plan & how to dial
Under country code +239, São Tomé & Príncipe runs a closed numbering plan — just a 7-digit subscriber number after the country code, no area code required.
3 major networks cover São Tomé & Príncipe (CST (Companhia Santomense de Telecomunicações), Unitel T+, Africell STP), against 42% internet penetration. VoIP is permitted and regulated by Agência Geral de Regulação (AGER). Because Portuguese is the primary language and São Tomé and Príncipe Dobra the local currency, both should inform IVR scripts, SMS content, and support hours.
Across African markets, mobile-first numbering dominates and Tier-1 interconnects are the key to consistent call delivery and CLI presentation.
Skipping the exit code
Reaching São Tomé & Príncipe from the US requires the 011 exit code ahead of +239 — skip it and the call won't connect.
Adding an area code that doesn't exist
São Tomé & Príncipe uses a closed plan — dial the +239 country code then the 7-digit subscriber number directly, with no area code.
Ignoring the time difference
UTC+0 governs local business hours in São Tomé & Príncipe; confirm the time there before placing the call.
Permitted — AGER regulated
Regulated by Agência Geral de Regulação (AGER)
- AGER regulates all electronic communications in São Tomé & Príncipe and requires licensing for VoIP services.
- International service providers must obtain gateway authorization from AGER before terminating traffic.
- Consumer protection and CLI transparency rules apply to virtual number providers operating in the country.
US → São Tomé & Príncipe
$0.40/min
per minute
São Tomé & Príncipe → US
$0.30/min
per minute
Business calling to São Tomé & Príncipe
Local ST caller ID
Present a São Tomé & Príncipe +239 number so prospects in São Tomé and nationwide recognise the call and are more likely to answer.
Africa outbound & support
Run sales and support lines into São Tomé & Príncipe over Tier-1 routes that interconnect with networks like CST (Companhia Santomense de Telecomunicações).
Follow-the-sun coverage
Staff São Tomé & Príncipe hours (UTC+0) with routing that sends calls to the right team at the right local time.
FAQ
Calling São Tomé & Príncipe — frequently asked questions
São Tomé & Príncipe uses a closed numbering plan with no leading trunk 0 to worry about — just the country code followed directly by the subscriber number. That makes the dial string identical whether you're calling from inside or outside the country.
São Tomé & Príncipe's ISO 3166-1 alpha-2 code is ST, distinct from its dialing code (+239). The ISO code is used in things like domain names and shipping forms, while the dialing code is what actually routes a phone call.
Yes — calls to São Tomé & Príncipe are billed per second, not rounded up to the minute, starting at $0.40/min. Per-second billing means a 45-second call costs less than a full minute, unlike carriers that round every call up.
São Tomé & Príncipe uses a closed plan: a single 7-digit subscriber number directly after the country code, with no separate prefix layer. Every number in the country is the same total length as a result.
No — São Tomé & Príncipe's closed plan has no trunk prefix; the country code is followed directly by the subscriber number. That keeps the dial format identical whether the call originates domestically or from abroad.
São Tomé & Príncipe's local currency is São Tomé and Príncipe Dobra, which is worth factoring into any pricing or invoicing shown to customers there. Twiching's own per-minute rates to and from São Tomé & Príncipe are quoted in USD regardless of the local currency.
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