Luxembourg (+352 / 00352): 6 to 9 digits
Locals write 621 123 456. An API wants +352621123456. Paste any Luxembourg number below to see it normalised, validated, and identified.
# free & rate-limited · no signup · live results from the same engine as the API
Since the engine is the same one the API runs, a key does not buy you a better answer. It buys volume, bulk jobs and a signed receipt.
How Luxembourg numbers are written
- Country calling code
- +352
- Dialled from abroad
- 00352 (011 352 from the US and Canada)
- ISO country code
- LU
- National number length
- 6 to 9 digits
- Trunk prefix
- None
- Written locally
- 621 123 456
- E.164 format
- +352621123456
What +352 means
+352 is the country calling code for Luxembourg. The same code is written 00352 when you dial out from most of Europe, Africa and Asia, and 011 352 from the US and Canada. All three reach the same place: only the exit code in front of it changes. Luxembourg uses no trunk prefix, so the national number follows the code unchanged.
Mobile numbers
No trunk prefix. Mobiles start with 621, 661 or 691.
Converting to E.164
Take the number as written locally (621 123 456), add the +352 prefix (there is no trunk digit to remove). The result is +352621123456: no spaces, no dashes, no parentheses. Store that, and format for display only when you show it to a human.
Why not do it with a regex
A pattern that matches Luxembourg numbers today breaks the moment a new mobile range is allocated, and it cannot tell you whether the number is actually assigned. The tool above runs the same numbering-plan engine as our phone validation API, so it also reports line type and region rather than just shape.
That is how a Luxembourg number is written. Whether a whole list is worth dialling is the free call list cleaner, or check one number on the spam phone checker.