How to Call Argentina from the US

To call Argentina from the US, dial 011 + 54 + area code + local number for landlines. For mobiles, insert a 9 between the country code and the area code: 011 + 54 + 9 + area code + number.

Example — Buenos Aires landline: 011-54-11-4555-1234. Buenos Aires mobile: 011-54-9-11-4555-5678.

That extra 9 for mobiles is the single step most guides omit, and omitting it is the #1 reason US-to-Argentina mobile calls fail or reach the wrong subscriber.

How to dial Argentina from the US

Landline

1. Dial 011 — the US international exit code. Every international call from a US landline or mobile starts here. (On a smartphone you can substitute +.)
2. Dial 54 — Argentina’s country code, assigned by the ITU.
3. Dial the area code without its leading 0. Argentine area codes are written with a leading 0 domestically (e.g., 011 for Buenos Aires, 0351 for Córdoba). Drop that 0 — it is Argentina’s trunk prefix, used only for domestic long-distance.
4. Dial the local subscriber number.

Full pattern: 011 54 <area code no leading 0> <local number>

Mobile — the critical 9-prefix step

1. Dial 011
2. Dial 54
3. Dial 9 — this is the international mobile routing prefix specific to Argentina.
4. Dial the area code without its leading 0.
5. Dial the 8-digit mobile number (omit any domestic 15 prefix you see written locally).

Full pattern: 011 54 9 <area code no leading 0> <8-digit mobile number>

Inside Argentina, callers reach a mobile by dialing 0 + area code + 15 + number. That 15 is a domestic mobile prefix. When calling from the US, the 15 disappears and a 9 takes its place — positioned before the area code, after 54. No other major country uses this convention.

Buenos Aires examples

Landline — local format: (011) 4555-1234

From the US: 011-54-11-4555-1234

Mobile — local format: 0 11 15-4555-5678

From the US: 011-54-9-11-4555-5678

Note that both numbers share the same area code (11 for Buenos Aires city). The only structural difference is the presence of 9 before the area code on the mobile line.

Argentine area codes

Argentina uses a semi-open numbering plan. Area codes range from two to four digits, and local subscriber numbers range from six to eight digits, such that area code + subscriber number always totals ten digits nationally.

City	Area code	Dial from US (landline prefix)	Dial from US (mobile prefix)
Buenos Aires	11	011-54-11-…	011-54-9-11-…
Córdoba	351	011-54-351-…	011-54-9-351-…
Rosario	341	011-54-341-…	011-54-9-341-…
Mendoza	261	011-54-261-…	011-54-9-261-…
La Plata	221	011-54-221-…	011-54-9-221-…
Mar del Plata	223	011-54-223-…	011-54-9-223-…
San Miguel de Tucumán	381	011-54-381-…	011-54-9-381-…

All area codes have the leading 0 removed for international dialing. The mobile 9 prefix applies uniformly regardless of city or carrier.

ENACOM and the domestic-15 / international-9 rule

The 9-prefix convention is not a carrier quirk — it is a regulatory numbering standard set by ENACOM (Ente Nacional de Comunicaciones), Argentina’s national telecom regulator.

Inside Argentina, mobile operators route calls using a 15 routing digit inserted after the area code. ENACOM’s international numbering plan replaces that 15 with a 9 positioned before the area code when calls originate from outside the country.

Because it is an ENACOM-assigned standard, it applies to every Argentine mobile number on every carrier. Vodafone, Claro, Personal, Movistar — the rule is the same.

ENACOM also governs local number portability in Argentina, meaning a Buenos Aires mobile can be ported between carriers without changing its digits, but the 9-prefix international dialing rule stays in place regardless.

Argentina time zone

Argentina observes Argentina Standard Time (ART), UTC-3, year-round. Argentina permanently abolished daylight saving time and does not shift its clocks seasonally.

Because Argentina stays fixed at UTC-3 while the US shifts between standard and daylight time twice a year, the offset from US time zones changes depending on the US season:

US time zone	Argentina offset (US winter)	Argentina offset (US summer)
Eastern (ET)	+2 hours	+1 hour
Central (CT)	+3 hours	+2 hours
Mountain (MT)	+4 hours	+3 hours
Pacific (PT)	+5 hours	+4 hours

Argentine business hours run roughly 9 AM–6 PM ART. For East Coast callers, the best window to reach an Argentine office is 7 AM–4 PM ET in winter or 8 AM–5 PM ET in summer.

Calling costs

Method	Approximate cost per minute
US carrier — no international plan	$0.20–$1.00+
US carrier — international add-on	$0.10–$0.30
VoIP (DialPhone)	Flat per-minute, typically far lower

For occasional calls — a few minutes per month — the standard carrier rate is acceptable. For sales teams, nearshore operations, or anyone calling Argentine contacts weekly, a VoIP business phone plan pays for itself quickly.

DialPhone pricing lists current per-minute rates to Argentine landlines and mobiles. A free trial includes outbound calling credit.

Mobile vs landline — what to watch for

The practical difference between calling an Argentine mobile and an Argentine landline comes down to one digit: the 9.

How to tell landline from mobile in a number you’ve been given:

• Argentine mobile numbers, when written in full domestic format, include the prefix 15 after the area code: 0 351 15-123-4567
• Argentine landline numbers do not include 15: 0 351 423-4567
• Argentine mobile numbers in E.164 / international format start with +54 9 followed by the area code

If you save an Argentine contact’s number in your phone, save it in E.164 format with the 9 included: +54 9 11 4555 5678. That format dials correctly from any country without modification.

If someone gives you a number with the 15 prefix and you are dialing from the US, drop the 15, insert 9 before the area code, and proceed: 0 11 15-4555-5678 → 011 54 9 11 4555 5678.

Argentina for business callers

Argentina is a significant US trading partner and a growing destination for nearshore tech and BPO operations. Key industries with frequent US-to-Argentina calling:

Agribusiness — Argentina is one of the world’s top exporters of soy, corn, beef, and sunflower oil. US commodity traders, logistics firms, and food companies call Buenos Aires and interior provinces regularly.

Technology — Mercado Libre (Latin America’s largest e-commerce platform) and Globant (a global software consultancy) are both Argentine-founded companies with US business relationships. Buenos Aires has a dense software engineering talent pool.

Argentine diaspora — An estimated 1+ million people of Argentine descent live in the US, concentrated in Miami, New York, and Los Angeles. Family and personal calls to Argentina are high-volume from these metros.

For businesses making frequent calls to Argentina, DialPhone’s business phone system supports outbound dialing to Argentina at flat per-minute rates with no per-seat international add-ons. The AI receptionist handles inbound calls in both English and Spanish — useful for Argentine-facing operations where callers may respond in castellano.

For call authentication, DialPhone implements STIR/SHAKEN on outbound calls, which helps your calls to Argentine carriers display as verified rather than flagging as potential spam — an increasing concern for international B2B callers.

If your business regularly receives calls from Argentine numbers and routes them through a US system, reviewing number porting options can simplify your inbound Argentine DID management.

Common mistakes

• Forgetting the 9 for mobiles. Dialing 011 54 11 4555 5678 instead of 011 54 9 11 4555 5678 either fails or reaches a landline at those digits. The 9 is mandatory for every Argentine mobile from abroad.
• Leaving in the domestic 15. If someone gives you their number as 011-15-4555-5678, they have written the Buenos Aires domestic format. Dialing 011 54 11 15 4555 5678 will not work. Drop the 15, add 9 before the area code: 011 54 9 11 4555 5678.
• Keeping the leading 0 on the area code. Argentine area codes are listed with a 0 in local format (011, 0351). Drop that 0 when dialing internationally. 011 54 011 4555 1234 will fail; 011 54 11 4555 1234 is correct.
• Calling 0800/0810 toll-free numbers from the US. Argentine freephone numbers do not work as freephone from abroad. Always use the geographic number instead.
• Wrong time zone calculation. Argentina does not observe DST. The UTC-3 offset is fixed year-round, so the gap between Argentina and US time zones shifts twice a year as the US moves between EST/EDT or PST/PDT.

FAQ

Frequently asked questions

How do I call a landline in Argentina from the US? +

Dial 011 (US exit code) + 54 (Argentina country code) + the area code without its leading 0 + the local subscriber number.

Example: a Buenos Aires landline written as (011) 4555-1234 becomes 011-54-11-4555-1234 from the US. The leading 0 in the Argentine area code is a domestic trunk prefix — drop it when calling internationally.

Why does Argentina use 9 for mobile calls from abroad? +

Inside Argentina, mobile numbers are dialed with a 15 prefix inserted after the area code — for example, 0 11 15-4555-5678 for a Buenos Aires mobile. That 15 is a domestic mobile routing prefix.

When calling from outside Argentina, the 15 is replaced by a 9 placed before the area code, immediately after the country code 54. So the same number becomes 011-54-9-11-4555-5678 from the US. No other major country uses this convention, which is why it catches so many callers off guard.

What is the full dial sequence for an Argentine mobile from the US? +

011 + 54 + 9 + area code (no leading 0) + 8-digit mobile number.

Example: 011-54-9-11-4555-5678. The 9 sits between the country code (54) and the area code — not at the end. Omitting it routes the call to a landline at the same digits or fails entirely.

What are the main area codes in Argentina? +

Buenos Aires city: 11. Córdoba: 351. Rosario: 341. Mendoza: 261. La Plata: 221. Mar del Plata: 223. San Miguel de Tucumán: 381.

Argentine area codes are two to four digits long depending on the region. Always remove the leading 0 when dialing from the US — the 0 is only used for domestic long-distance calls within Argentina.

What time zone is Argentina in, and does it observe DST? +

Argentina observes Argentina Standard Time (ART), which is UTC-3 year-round. Argentina does not observe daylight saving time.

From the US East Coast, Argentina is 2 hours ahead in winter (when the US is on EST) and 1 hour ahead in summer (when the US shifts to EDT). From the US West Coast, Argentina is 5 hours ahead in winter and 4 hours ahead in summer.

Can I call Argentine toll-free numbers (0800/0810) from the US? +

No — Argentine 0800 and 0810 numbers are free only when dialed from within Argentina. Calls from the US to these numbers either fail to connect or are charged at a standard international rate, which can be higher than calling a regular Argentine landline.

Always ask for the geographic number (one starting with a standard area code) when you need to call an Argentine business from abroad.

How much does it cost to call Argentina from the US? +

Traditional US carrier rates to Argentina run roughly $0.20–$1.00+ per minute without an international plan. Carrier add-on packages reduce that to $0.10–$0.30 per minute but add a monthly fee.

VoIP providers like DialPhone charge a flat per-minute rate that is typically $0.01–$0.05 per minute — a significant saving for teams that call Argentina regularly. See DialPhone pricing for current rates.

What is ENACOM and why does it matter for calling Argentina? +

ENACOM (Ente Nacional de Comunicaciones) is Argentina's national telecommunications regulator, established by Decree 267/2015. ENACOM governs numbering assignments, portability rules, and interconnection standards for all Argentine carriers.

The domestic-15 / international-9 mobile convention is an ENACOM-assigned numbering standard — not a carrier quirk. Because it is a regulatory numbering rule, it applies universally to every Argentine mobile number regardless of which carrier issued it.

Related guides

• How to call the UK from the US — same exit-code pattern, different country-specific rules
• Number porting guide — moving Argentine DIDs into your US system
• STIR/SHAKEN explained — call authentication for international outbound
• DialPhone business phone
• DialPhone pricing
• Free trial