Luxembourg phone number format
How do you format a Luxembourg phone number?
Write a Luxembourg phone number with the country code +352. A mobile looks like 628 123 456 inside Luxembourg and +352 628 123 456 from abroad. Mobiles have 9 digits after the country code, and the E.164 form is +352628123456. A format check confirms the digits fit the numbering plan, not that the number is in service.
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Paste your Luxembourg numbers (a mixed list is fine). They are counted here at once; the free checker then gives every number its E.164 form, country and line type, with a file to download.
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See the phone add-onLuxembourg number format at a glance
| Country calling code | +352 |
|---|---|
| International prefix (calling out of Luxembourg) | 00 |
| Trunk prefix (domestic dialling) | None |
| Mobile number length | 9 digits after +352 |
| Landline number length | 4 to 11 digits after +352 |
| Mobile vs landline from the digits | Yes, separate ranges |
In short: +352, 9 digits for a mobile. The checker below formats any Luxembourg number free in your browser; it can't say whether a line is live. Bulk phone number validator · Pro + Phone plan
Example Luxembourg phone numbers
These are the example numbers from Google’s libphonenumber data, the same numbering-plan data our validator uses, written three ways.
| Format | Mobile | Landline |
|---|---|---|
| National (inside Luxembourg) | 628 123 456 | 27 12 34 56 |
| International | +352 628 123 456 | +352 27 12 34 56 |
| E.164 | +352628123456 | +35227123456 |
How to write a Luxembourg number in E.164
- Remove spaces, dashes, dots and brackets so only digits are left.
- Luxembourg has no trunk prefix, so keep every digit of the national number.
- Put +352 in front. The result has 9 digits after the country code for a mobile.
So 628 123 456 becomes +352628123456. E.164 is the format SMS gateways, dialers and most CRMs store; see the E.164 format explained for why.
Mobile or landline?
Luxembourg allocates separate number ranges to mobiles and landlines, so a numbering-plan check reads the line type straight from the digits, for free. That type describes the range the number came from. It doesn’t prove the number is connected today.
Mobile, landline and special number ranges in Luxembourg
A Luxembourg mobile number starts with 62, 65–69 after +352. Every valid number of each type below starts with one of the digit groups shown. A number that starts the right way can still be unassigned: the groups say what a range is for, not that a number is connected.
| Type | Starts with, after +352 | Digits | Example |
|---|---|---|---|
| Mobile | 62, 65–69 | 9 | +352 628 123 456 |
| Landline (fixed line) | 22–29, 3–5, 7, 80, 81, 83–89, 90, 92–95, 97, 99 | 4 to 11 | +352 27 12 34 56 |
| Toll-free | 800 | 8 | +352 800 12 345 |
| Premium rate | 900, 901, 905 | 8 | +352 900 12 345 |
| Shared cost | 801 | 8 | +352 801 12 345 |
| VoIP | 201–206, 208, 209 | 4 to 10 | +352 20 20 12 34 |
More on Luxembourg’s free-to-call and charged ranges: toll-free and premium numbers in Luxembourg.
Sources, checked 5 November 2026
- Ranges, lengths and examples: Google libphonenumber numbering-plan data (libphonenumber-js 1.13.15), the data our validator uses.
- Official plan: ITU-T E.164 national numbering plan for Luxembourg. The regulator’s filing is the authority when the two disagree.
Validate a list of Luxembourg numbers
Check a single number with the free phone number validator. For a whole file, upload the CSV to the verifier: every row gets a status, the E.164 number, the country and the line type, and emails in the same file get a live mailbox check. The Pro + Phone plan ($49.99 a month) adds 5,000 live carrier lookups a month for the real line type and current carrier.
Common questions
- What is the country code for Luxembourg?
- The country calling code for Luxembourg is +352. When you call Luxembourg from abroad, dial your international prefix (or +) followed by 352 and the number.
- How many digits is a Luxembourg phone number?
- A Luxembourg mobile number has 9 digits after the country code +352, and a landline has 4 to 11.
- How do I write a Luxembourg number in international format?
- Start with +352, then add the rest of the number. The mobile number 628 123 456 becomes +352 628 123 456, or +352628123456 in E.164, the form most CRMs and SMS tools expect.
- Can you tell if a Luxembourg number is a mobile?
- Usually, yes. Luxembourg numbers come from ranges allocated separately to mobiles and landlines, so a numbering-plan check reads the line type from the digits. It tells you what the range is for, not whether the number is in service.
- Does a valid format mean a Luxembourg number is in service?
- No. A valid format means the digits fit a range Luxembourg's numbering plan allocates. It cannot tell whether the number is connected today or who carries it, because numbers are reassigned and ported. A live carrier lookup reports the current carrier and line type, but even that does not prove someone answers.
- Can I check a list of Luxembourg numbers for free?
- Yes. Paste them in the list tab above or upload a CSV to the bulk phone number validator: E.164, country, format status and numbering-plan line type are free for every row, with no account. Live carrier and line-type lookups come with Pro + Phone at $49.99/mo (5,000 a month).
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- Upload a CSV up to 100,000 rows with an email or phone column
- Every phone gets status, E.164 format, country and number type
- Emails in the same file get a real SMTP mailbox check
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