Generate random US-format phone numbers with real area codes, shown in both US and international (+1) formats. For mock data and testing.
| Input | Result |
|---|---|
| 5 numbers | a batch for mock data |
| 212 fixed | all numbers in New York's 212 code |
| blank area code | a different real US city each time |
They are randomly assembled, NOT verified as unassigned, a generated number can theoretically belong to a real subscriber. For fiction and scripts, use the officially reserved 555-01xx block. For software tests, use your platform's documented test numbers.
Yes, every area code in the bank is a genuinely assigned US code (212 New York, 310 Los Angeles, 312 Chicago…). The exchange and line digits are random.
(XXX) XXX-XXXX is the US convention; +1 XXX XXX XXXX is the international E.164-style form you need when a form or API expects a country code.