The +1 prefix belongs to Puerto Rico. If you got a call or text from a number starting with +1 (calling code 1), it came from Puerto Rico.
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Code
+1
ISO
PR
Region
Americas
Time zone
America/Puerto Rico
The +1 code identifies Puerto Rico on the international telephone network. Country code 1 is assigned to Puerto Rico under the ITU-T E.164 numbering plan, so any phone number that begins with +1 — written +1 or 001 — is a Puerto Rico number.
Every Puerto Rico number in international format follows this shape — colour-coded so you can see where the country code ends and the local number begins.
When dialing Puerto Rico from abroad, the only fixed part is +1 — that's the country code. The rest depends on whether you're calling a mobile or landline number inside Puerto Rico.
+X XXX XXX XXXX
Example: +1 787 234 5678
+1 XX XXXX XXX
Include the area code if applicable. Omit any leading 0.
Enter the country code +1 when dialing Puerto Rico from abroad.
Add the local phone number (in most countries, drop the leading zero).
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Example numbers for Puerto Rico:
Dialing codes immediately above and below +1 in the ITU plan — handy if you mistyped a digit or are dialing across a region.
Everything you need to know about TwinPhone.
The +1 code belongs to Puerto Rico. Any phone number that starts with +1 — or with 001 — is a Puerto Rico number.
The 001 prefix is Puerto Rico. The 00 is the international exit code dialed from Europe and many other regions; it is followed by +1, the Puerto Rico country code.
Dialing code 1 (dialed as +1 or 001) belongs to Puerto Rico. Any phone number that starts with +1 is a Puerto Rico number.
Country code 1 is the ITU-T E.164 calling code for Puerto Rico. To call Puerto Rico from abroad, dial +1 followed by the national number.
The country code (international dialing code) for Puerto Rico is +1. To call Puerto Rico from abroad, dial +1 followed by the national number (in most countries, without its leading zero).
+1 is Puerto Rico's international country calling code under the ITU E.164 plan — often searched as the "1 area code". Any phone number starting with +1 is a Puerto Rico number.
From TwinPhone, just type +1 and the number — we connect it. From a landline, dial your exit code, then +1, then the number (in most countries, without the leading 0).
Puerto Rico's current local time is shown live on this page. Check it before calling so you reach people during waking hours.
Yes! Virtual numbers in Puerto Rico start at $1.60/month. Use it as your caller ID so people see a local number, or receive incoming calls directly in your browser.
Calling Puerto Rico with TwinPhone starts from $0.02/min, billed by the minute (rounded up to the next full minute). It is pay-as-you-go from your browser — no connection fee and no monthly fee. The exact per-minute price for +1 landlines and mobiles is shown live on this page.
Yes. TwinPhone works entirely in your web browser — Chrome, Edge, Safari, or Brave on desktop or mobile. There is no app to install and no SIM card: open the site, add credit, dial +1 and the Puerto Rico number, and the call connects.
A +1 number is not automatically a scam — +1 is simply the country code 1 assigned to Puerto Rico under ITU-T E.164, so the call or text came from Puerto Rico. If you do not know anyone there, treat an unexpected +1 call with the same caution as any unknown number: do not call back blindly and do not share personal details. Costs to call Puerto Rico are shown above.
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