Luxembourg phone number validator
How the phone number format works
- Format
- Luxembourg phone number in national or international (+352) format
- Example
- +352628123456
Things to watch for
- Accepts national or international (E.164, e.g. +352...) format
- Validated with Google's libphonenumber; confirms the number is possible/valid for this country, not that it is currently assigned or reachable
^[+]?[0-9 ()\-]{6,}$A Luxembourg phone number has no fixed length — unlike a country with one strict digit count, Luxembourg’s numbering plan carries subscriber numbers of varying size, from short legacy fixed-line numbers to nine-digit mobile numbers starting with 6 (628 123 456). There’s also no trunk prefix to worry about: Luxembourg never adopted a leading 0 for domestic dialling, so the digits used locally and the digits used after +352 are identical.
How this validator works
Enter the number as given (628123456) or with the country code (+352628123456); this tool checks the digits against Luxembourg’s real numbering ranges using Google’s libphonenumber, which handles the variable length internally rather than enforcing one fixed digit count. Because there’s no 0 to strip and no single expected length, the most common failure here is an implausible prefix or a digit count that falls outside any range Luxembourg’s plan actually issues — not a leftover trunk digit like in neighbouring countries.
What a pass doesn’t tell you
A pass confirms the number falls within a real Luxembourg numbering range — it doesn’t confirm the line is connected or the mobile SIM active. Format validity and current reachability are separate questions this tool doesn’t try to answer.
Scope: useful for catching an implausible digit count or an invalid prefix before a Luxembourg number reaches a form or SMS gateway — not a substitute for a real lookup service.
Content last reviewed 2026-07-07.
phone number FAQ
Why doesn't a Luxembourg number have a fixed digit count?
Luxembourg's numbering plan was never standardized to one length the way most countries' were — subscriber numbers assigned over the decades range from as few as six digits for some older fixed lines to nine for newer mobile numbers, so a strict digit-count rule can't apply the way it does elsewhere.
Is there a trunk 0 to drop when converting a Luxembourg number to +352?
No. Luxembourg never adopted a national trunk prefix, so the number dialled locally is the same string of digits used internationally — +352 simply goes in front of it, nothing stripped or reshuffled.
Does a valid check confirm a Luxembourg number is currently reachable?
No. It only confirms the digits fall within a real, recognized Luxembourg numbering range — not that the line is connected or the SIM active, which needs a carrier-side lookup this tool doesn't perform.