551 Area Code — New Jersey
551 is a North American Numbering Plan area code for New Jersey, the United States. It covers about 1,425,289 people in 57 towns and 73 ZIP codes, including Jersey City, Bayonne and Union City.
| Field | Value |
|---|---|
| Area code | 551 |
| Country | United States (+1) |
| State / province | New Jersey |
| Type | Shares its towns with 201 |
| Time zone | Eastern |
| Population covered | 1,425,289 |
| Towns covered | 57 |
| ZIP codes | 73 |
| Approx. centre | 40.877, -74.046 |
Where area code 551 is used
Area code 551 is assigned to New Jersey, the United States, inside the North American Numbering Plan. Numbers in the code are written (551) NXX-XXXX at home and +1 551 NXX-XXXX when dialled from outside Canada and the United States. Since the NANP moved to 10-digit dialling you must always include the area code, even for a local call.
Other area codes in this footprint: 201. They serve towns in the same territory, so a single street can contain numbers from more than one code. That is normal in the NANP and does not change how you dial.
Towns and cities in area code 551
The 57 towns below are the largest in the 551 footprint, ranked by population. Every one of them links to its own page with the full list of area codes and ZIP codes for that town.
| Town | County | Population | ZIP codes |
|---|---|---|---|
| Jersey City | Hudson County | 294,078 | 12 |
| Bayonne | Hudson County | 71,553 | 1 |
| Union City | Hudson County | 66,463 | 1 |
| West New York | Hudson County | 63,758 | 1 |
| North Bergen | Hudson County | 61,250 | 1 |
| Hoboken | Hudson County | 58,668 | 1 |
| Hackensack | Bergen County | 46,057 | 2 |
| Teaneck | Bergen County | 41,876 | 1 |
| Kearny | Hudson County | 40,614 | 2 |
| Fort Lee | Bergen County | 40,024 | 1 |
| Fair Lawn | Bergen County | 35,610 | 1 |
| Englewood | Bergen County | 29,638 | 1 |
Counties covered
| County | ZIP codes |
|---|---|
| Bergen County | 51 |
| Hudson County | 22 |
Other area codes serving the same towns
Nearby area codes
How to dial area code 551
- Within North America: 551 + 7-digit number (551-NXX-XXXX). The leading 1 is optional on a mobile phone and required on most landlines for long-distance.
- From abroad: your country's international prefix, then 1, then 551, then the 7-digit number — for example 00 1 551 NXX-XXXX from most of Europe.
Frequently asked questions
What area code is 551?
551 is a North American Numbering Plan area code assigned to New Jersey, the United States. It covers about 1,425,289 people in 57 towns.
Is 551 a US or Canadian area code?
551 is a United States area code. Canada and the United States share the +1 country code, so both are part of the same numbering plan.
What time zone is area code 551 in?
Area code 551 is in the Eastern time zone.
Do I have to dial 10 digits?
Yes. Every NANP call now requires the area code plus the seven-digit number, even for a local call.