Use the ITU national numbering-plan list for current assigned codes. This prototype highlights a few examples, not a complete live database.
Examples from the plan
The ITU lists +44 for the United Kingdom, +49 for Germany, +91 for India and shared +7 for Russia and Kazakhstan.
Shared codes need more digits
Under +1, area and exchange codes distinguish participating NANP regions. The country code alone does not resolve the country.
Check for updates
Allocations and national rules can change. Cite the responsible numbering authority and record the metadata date before publishing a lookup.
A small reference, not a worldwide database
These selected assignments explain how to read a prefix. They do not cover every country, territory or global service.
| Calling code | Plan | Follow-up question |
|---|---|---|
| +1 | Shared NANP | Which numbering-plan area follows? |
| +44 | United Kingdom | Is this a geographic or other range? |
| +49 | Germany | Is the input already international? |
| +91 | India | Does the full number fit the national plan? |
| +7 | Russia / Kazakhstan | Which national allocation applies? |
A prefix missing from this table is unsupported here, not necessarily invalid. Neither the table nor the explorer checks whether a full number is assigned.