This free Argentine phone number checker shows whether a number is valid.
An Argentine phone number checker tells you whether a number is real, which means it follows Argentina's numbering rules and is assigned. Enter a +54 number above and 1Lookup's free checker returns valid or invalid in seconds, with the line type and country, checked against Argentina's numbering plan.
Pick the country, then enter the number without the country code.
Free & rate-limited. No signup required to try.
- Country code
- +54
- Mobile numbers
- 11 digits after +54, starting 9
- Landlines
- 10 digits after +54, starting 1, 2 or 3, such as +54聽11聽XXXX聽XXXX
- Written at home
- 011 15-2345-6789
- Written for apps and SMS
- +5491123456789
- Dialed from the US
- 011 54 9 11 2345 6789
An Argentine mobile number is +54 followed by 11 digits, and the first one is 9.
Written with the country code
- +54Country code
- 9Mobile start
- 11 2345 678910 more digits
The +54 comes before the number and is dropped when you dial inside Argentina.
An Argentine phone number checker reads a number's format first and then checks it against Argentina's numbering plan.
This is the path one check takes. A number can be written correctly and still not be assigned to anyone, so the format check alone is not the answer.
- You enter the numberType it the way it is written at home, such as 011 15-2345-6789, or paste it with +54.
- Its format is checkedEach type of number has its own rules. A mobile needs 11 digits after +54 and starts with 9 after +54.
- It is checked against the numbering planNumbers outside the US and Canada are checked against the numbering plan of their country, which for this page is Argentina's.Nothing is sent to the number, so it never rings and its owner is never told.
- You see valid or invalidWith the line type and country in a few seconds, and the carrier or network where one is listed.
An Argentine mobile number has 11 digits after +54 and starts with 9.
These lengths come from the numbering data for Argentina. Written at home, a mobile number has a 15 after the area code in place of the 9. The numbering data also lists a small range starting 67, which this page leaves out.
| Number type | Starts with after +54 | Digits after +54 | Written at home |
|---|---|---|---|
| Mobile | 9 | 11 | 011 15-2345-6789 |
| Landline | 1, 2 or 3 | 10 | 011 XXXX-XXXX |
Three common mistakes make an Argentine number fail the check, and each one is quick to fix.
Repeating +54 adds digits.
Write +54 9 11 2345 6789 once, with the country code at the front.
Typing too few or too many digits makes a number invalid.
A mobile number has 11 digits after +54. With 10 or 12, look for a missing or doubled digit.
Leaving the wrong country selected changes how the number is read.
The checker reads a number by the rules of the country selected above, so keep Argentina selected for a +54 number. Paste a number with its + and country code and the country is read from the number itself.
These are the questions people ask most about checking Argentine phone numbers.
How do I check if an Argentine phone number is valid?
Enter the number in the box above with Argentina selected. The free checker returns valid or invalid in seconds, with the line type and country. Type it the way it is written at home, such as 011 15-2345-6789, or in full as +54 9 11 2345 6789.
How many digits is an Argentine phone number?
A mobile number has 11 digits after +54. A landline has 10 digits after +54, such as +54 11 XXXX XXXX.
What does an Argentine mobile number start with?
Written with +54, mobile numbers start with 9. Written at home, a mobile number has a 15 after the area code in place of the 9. The numbering data also lists a small range starting 67, which this page leaves out.
How do I write an Argentine number for an app or an SMS tool?
Use the E.164 form: a plus sign, 54, then the number and no spaces, such as +5491123456789.
Does the Argentine phone number checker show the carrier?
It shows the carrier or network where one is listed. Numbers outside the US and Canada are checked against the numbering plan of their country rather than live carrier data, so some come back with no carrier name.
Does valid mean the Argentine number is active?
No. Valid means the number is real, correctly written for Argentina and assigned. Whether a line is switched on and reachable right now is a different question, and the free HLR lookup answers it.
Can I check a whole list of Argentine phone numbers?
Yes. This free tool checks one number at a time. A 7-day free trial opens CSV upload and the API, at 1 credit a number.
Does the person know I checked their number?
No. The check reads records only. No call or text goes to the number, so its owner is never told.
What are the landline area codes of Rosario, C贸rdoba and Mendoza?
The codes are 341 for Rosario, 351 for C贸rdoba and 261 for Mendoza. From abroad you dial +54 and then the code, so Rosario is +54 341. The area code is part of the digits of a landline number.
You can check numbers from other countries on their own pages.
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These free tools answer the next question about a number.
- The +54 country code pageHow to dial Argentina, the time there now and the landline places.
- HLR lookupCheck whether a mobile number is switched on and reachable right now.
- Line type lookupSee whether a number is a mobile, a landline or VoIP.
- Carrier lookupFind the carrier or network behind a number.
- Phone validator for any countryThe same check with the country picker open to every country.
- Phone validation APIRun the same check from your own software, one request per number.
Sources: Google's libphonenumber numbering data for lengths, mobile starts and landline starts, as of September 24, 2026; the ITU list of country codes.