| xxxxxxxxx | 76% |
| xxxxxxxxxx | 11% |
| xxx xxx xxx | 6% |
| xxx-xxx-xxx | 3% |
| xxx xxx xx xx | 2% |
| (other) | 2% |
From a database of 34+ thousand users. There were 292 total different formats, 37 of which were used by more than 10 people. The form field hint was "z kierunkowym, np. 022 xxx xx xx lub komórkowy" ("incl. area code, i.e. 022 xxx xx xx or mobile".)
