How to Call Denmark from the US

To call Denmark from the US, dial 011 + 45 + the 8-digit Danish number. There are no area codes and no leading 0 to drop — you dial every Danish number the same way.

Copenhagen example: a number written 33 XX XX XX is dialed as 011-45-33-XX-XX-XX. Danish mobile example: a number written 20 XX XX XX is dialed as 011-45-20-XX-XX-XX.

The 011 is the US international exit code. The 45 is Denmark’s country code. This pattern works from any US landline or mobile — on a smartphone you can substitute + for 011, dialing +45 33 XX XX XX.

How to dial Denmark from the US

Follow these three steps every time:

1. Dial 011 — the US exit code for all international calls. On a mobile keypad, long-press 0 to enter + as a shortcut; + works identically to 011 on smartphones.
2. Dial 45 — Denmark’s ITU-assigned country code, used for every Danish number regardless of type.
3. Dial the full 8-digit number. Denmark uses a closed numbering plan: there are no area codes and no trunk prefix, so you dial all eight digits exactly as written.

The complete pattern: 011 45 <8-digit number>.

If you see a Danish number already formatted with +45 (common on business cards and websites), replace the + with 011 from a US landline, or dial it as-is from a smartphone.

Danish numbers: no area codes

Unlike Germany or France, Denmark has no geographic area codes. The country switched to an 8-digit closed numbering plan, so the entire number is the subscriber number.

The digits are conventionally written in pairs — XX XX XX XX — but that grouping is purely for readability. You dial all eight, with no spaces, after 011 45.

Number type	Typical first digit	Dial from US
Landline	3, 7, or 8	011 45 + 8 digits
Mobile	2, 4, or 5	011 45 + 8 digits
Toll-free (freephone)	80	not reliably reachable from abroad

Because numbers are not tied to a city, the same 011 45 pattern reaches a contact in Copenhagen, Aarhus, or Odense without any change.

How Danish numbering works

Denmark operates an 8-digit closed numbering plan with no area codes and no trunk prefix. This is the key difference from most European countries: there is no leading 0 to drop when you call from abroad.

Numbers are portable across both carrier and geography, so a Danish landline number can be kept even if the subscriber moves to a different part of the country. That portability is one reason Denmark abandoned geographic area codes.

You can usually infer the line type from the first digit — landlines commonly begin with 3, 7, or 8, and mobiles with 2, 4, or 5 — but there are exceptions, so treat the first digit as a hint rather than a rule.

Time zones: CET and CEST

Denmark observes two time settings across the year:

• CET (Central European Time) — UTC+1, in effect from the last Sunday of October through the last Sunday of March (Denmark’s “winter time”).
• CEST (Central European Summer Time) — UTC+2, in effect from the last Sunday of March through the last Sunday of October.

US time zone	Offset to Denmark (most of the year)
Eastern (ET)	Denmark +6 h
Central (CT)	Denmark +7 h
Mountain (MT)	Denmark +8 h
Pacific (PT)	Denmark +9 h

Because the US and EU both observe daylight saving over broadly the same months, Denmark stays 6 hours ahead of US Eastern for most of the year.

Important for business callers: the US and EU do not switch clocks on the same Sunday. For roughly two weeks each spring and fall, the offset temporarily shifts by one hour. During those windows, confirm the local time before scheduling recurring calls.

The reliable overlap window for standard business hours is 8 AM–11 AM ET, reaching Danish offices between 2 PM and 5 PM local time before most close.

US to Denmark calling costs

Costs vary significantly by calling method:

• US carrier per-minute (no plan): major US carriers can charge roughly $2–$3 per minute to Denmark without an international add-on. Fine for a call or two per month.
• Carrier international add-on packages: a monthly fee reduces rates to a few cents per minute. Worthwhile above roughly 30 minutes per month.
• VoIP providers (including DialPhone): flat per-minute rates to Denmark that typically undercut carrier add-ons, with no monthly minimum. For US–Denmark business calling at any volume, a VoIP plan on DialPhone business phone pays for itself quickly.
• Free app-to-app (WhatsApp, Signal): works if the Danish side also uses the app and has Wi-Fi or data. Not viable for reaching most Danish landlines or businesses.

See DialPhone pricing for current per-minute Denmark rates included in each plan tier.

Calling Danish mobile vs landline from the US

From a US perspective, the dialing procedure is identical for both: 011 45 <8-digit number>. Denmark uses the same length and format for mobiles and landlines, so there is no separate prefix or area code to add for either.

The practical difference is identifying the line type and anticipating cost:

• Landlines typically begin with 3, 7, or 8.
• Mobiles typically begin with 2, 4, or 5.

Calling cost note: Danish mobile destinations can be priced higher per minute than landlines on some US carrier plans. VoIP providers including DialPhone typically apply a single flat rate regardless of landline vs mobile destination.

SMS to Denmark and business use cases

US-to-Denmark SMS works from most US mobile plans — the same international add-on that covers calls usually covers texts. Send to +45 followed by the 8-digit number. Business-grade SMS (A2P, bulk, or CRM-triggered) requires a provider supporting international SMS routing to Danish networks.

US–Denmark B2B context where this matters most:

• Shipping and logistics: US firms coordinating with Danish maritime and freight counterparties benefit from a recognizable caller ID and disciplined time-zone management.
• Pharmaceuticals and life sciences: US partners working with Danish biotech and pharma firms in and around Copenhagen rely on reliable, scheduled calls within the narrow overlap window.
• Renewables and technology: US buyers and SaaS vendors selling into Danish wind-energy and clean-tech companies find that verified caller ID improves answer rates.

DialPhone’s AI receptionist handles the time-zone asymmetry automatically: when a Danish contact calls your US DialPhone number outside US business hours, the AI receptionist answers, qualifies the inquiry, and routes or escalates based on rules you set — no missed opportunity because of a 6-hour offset.

For outbound, DialPhone routes US-to-Denmark calls with STIR/SHAKEN A-attestation, so your caller ID passes carrier verification checks rather than appearing as an unverified international number — a meaningful factor for answer rates.

FAQ

Calling Denmark FAQ

What is the country code for Denmark? +

Denmark's country code is +45. From a US landline or mobile, you reach it by dialing the US international exit code 011 first, making the full prefix 011 45. From a smartphone that supports E.164 dialing you can substitute + for 011, so +45 works identically.

Do I need to drop a leading 0 when calling Denmark from the US? +

No. Denmark does not use a trunk prefix or leading 0, and it has no area codes. Danish numbers are a flat 8 digits — for example a Copenhagen number written as 33 XX XX XX is dialed in full.

From the US you simply dial 011 45 followed by all 8 digits. There is nothing to drop, which makes Denmark simpler to dial than Germany or France.

How do I call a Danish mobile number from the US? +

Danish mobile and landline numbers share the same 8-digit format, so the dialing procedure is identical: 011 + 45 + the 8 digits.

You can usually tell the type from the first digit — mobile numbers generally begin with 2, 4, or 5, while landlines typically begin with 3, 7, or 8. There is no separate mobile prefix or area code to add.

What is the best time to call Denmark from the US? +

Denmark is 6 hours ahead of US Eastern Time year-round, because both regions observe daylight saving during overlapping periods (UTC+1/UTC+2 in Denmark vs UTC-5/UTC-4 in the US East). The reliable business-hours overlap is 8 AM–11 AM ET, which lands in the 2–5 PM range in Denmark — still within office hours.

Note: the US and EU switch clocks on different Sundays each spring and fall, so for roughly two weeks the offset can briefly shift by one hour.

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

Standard US carrier rates without an international plan can run roughly $2–$3 per minute to Denmark. Carrier international add-on packages reduce this to a few cents per minute for a monthly fee.

VoIP providers including DialPhone charge flat per-minute rates to Danish destinations that are typically lower than carrier add-on plans, with no monthly minimum for low-volume callers.

Can I call Danish toll-free (80) numbers from the US? +

Danish 80 freephone numbers are designed to be free only when dialed from within Denmark. Calling one from the US will often fail to connect, and where it does connect it is usually not free for you.

Ask your Danish contact for their standard 8-digit geographic or mobile number as a reliable alternative when calling from abroad.

What is the difference between CET and CEST for calling Denmark? +

CET (Central European Time) is UTC+1 and applies from late October to late March — Denmark's standard time. CEST (Central European Summer Time) is UTC+2 and applies from late March to late October.

Because the US also observes daylight saving over a similar period, Denmark stays 6 hours ahead of US Eastern across most of the year. The EU and US change clocks on different Sundays, so for roughly two weeks the offset temporarily becomes 7 hours.

How do I save a Danish number in my phone contacts? +

Save Danish numbers in full E.164 international format: +45 followed by all 8 digits, with no leading 0 and no area code. For example, a Copenhagen number 33 XX XX XX should be saved as +45 33 XX XX XX.

This format works from any country without modification, prevents dialing errors when roaming, and is the standard format expected by CRMs and VoIP platforms including DialPhone.

Start calling Denmark today

Whether you make occasional calls to a Danish supplier or run a team with daily US–Denmark volume, the right setup eliminates per-minute sticker shock and missed calls.

• DialPhone pricing — compare per-minute Denmark rates across plans
• Start a free trial — call Denmark from day one, no commitment
• DialPhone business phone — full VoIP platform with international DID support
• AI receptionist — handle inbound calls from Denmark 24/7

Related guides

• How to call Germany from the US — same exit-code pattern, +49
• How to call France from the US — +33 with a leading 0 to drop
• STIR/SHAKEN explained — why caller ID attestation matters for international calls

Call other countries from the US

Part of the How to Call Internationally from the US hub — exit code 011, country codes, and the per-country mobile rules.

• How to call the UK from the US
• How to call Germany from the US
• How to call France from the US
• How to call Italy from the US
• How to call Spain from the US