551 area code
Jersey City area, Eastern Time.Area code 551 covers Jersey City, Hackensack, Bayonne and 19 more places in New Jersey, on Eastern Time. 201 covers the same area.
Right now in Jersey City
Eastern Time (EST, UTC-5; EDT, UTC-4 in summer)
Calling hours: Every day, 8 AM to 9 PM (the federal rule)
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Where 551 numbers come from
Numbers are issued by rate center, a billing area named for its main town. 551 has 22. Each one's share is how many 551 numbers start there. Its biggest metro area is New York-Newark-Jersey City, NY-NJ.
- Jersey City18%
- Hackensack15%
- Bayonne11%
- Union City8%
- Ramsey7%
- Fair Lawn6%
- Cliffside5%
- Kearny4%
- Ridgewood3%
- Rutherford3%
- Closter3%
- Leonia2%
Also: Wyckoff, Westwood, Englewood, Park Ridge, Dumont, Oakland, Oradell, Teaneck, Cragmere, Hasbrouck Heights
Share of exchanges (blocks of 10,000 numbers). Source: NANPA rate center and exchange reports, November 10, 2026
When can you call a 551 number?
Sales calls to homes and cell phones have legal hours, set by the federal rule. Hold every 551 number to them, since you can't tell a work line from a personal cell.
What applies to 551Every day, 8 AM to 9 PM
- Federal (TCPA and FTC rule)Every day, 8 AM to 9 PMCalls to residential and mobile numbers. Most calls to businesses are exempt from the FTC's rule.47 CFR 64.1200(c)(1); 16 CFR 310.4(c) (opens in a new tab)
Local time comes from the area code, not from where the person is today. Mobiles keep their number when they move. Calling hours here are a guide, not legal advice. Every state's calling hours, with sources
551 and 201
551 went into service on December 29, 2001. 551 and 201 cover the same area, so new numbers can get either code and neighbors can have different area codes. 551 holds 29% of the area's exchanges; 201 holds the most. Local calls take all 10 digits.
- 1947201 overlay
- 2001551 starts
Source: NANPA area code database
Calling a list of 551 numbers?
Paste it into the free phone number validator. It checks every number, finds each one's time zone and sorts the list by who you can call right now.
551 area code FAQ
What area code is 551?
551 is a New Jersey area code for Jersey City, Hackensack, Bayonne, Union City and 18 more places.
What time zone is the 551 area code in?
Eastern Time (EST, UTC-5; EDT, UTC-4 in summer).
Is 201 the same as 551?
Same area, different code. 551 and 201 cover the same area (an overlay), so new numbers can get any of them and local calls take all 10 digits.
What are the calling hours for 551 numbers?
Every day, 8 AM to 9 PM, local time, under the federal rule.
When did the 551 area code start?
On December 29, 2001.
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