Quick answer
The 551 area code serves Jersey City, New Jersey in the Eastern Time (ET) (UTC-5 / UTC-4 DST). Assigned in 2001, it covers Northeastern New Jersey including Jersey City, Hackensack, Hoboken. Overlay code: 201.
- Region
- Northeastern New Jersey, NJ
- Time zone
- ET (UTC-5)
- Assigned
- 2001
- Population
- ~1,500,000
- Local time now
- · live
Where is area code 551?
The 551 area code is a North American Numbering Plan geographic code serving Jersey City and the surrounding Northeastern New Jersey region in New Jersey. Assigned by the North American Numbering Plan Administration in 2001, it currently serves approximately 1,500,000 residents on the Eastern Time (ET) (UTC-5 / UTC-4 DST). It shares geography with overlay code 201.
Cities served by the 551 area code
The 551 area code covers 4 major cities and towns across the Northeastern New Jersey region:
| City | State |
|---|---|
| Jersey City | NJ |
| Hackensack | NJ |
| Hoboken | NJ |
| Paramus | NJ |
Businesses across Jersey City and surrounding cities use 551 numbers to project local presence and lift call answer rates. Industry studies of local presence dialing consistently report answer-rate gains of 20–40% over toll-free or out-of-area numbers — a caller ID that matches the recipient's region looks familiar and gets picked up.
551 area code time zone and business hours
The 551 area code is in the Eastern Time (ET) zone (UTC-5 / UTC-4 DST). Standard business hours in 551 run 9 AM to 5 PM ET.
If you're calling into 551 from a different time zone, factor in the offset. For example, an Eastern Time business calling 551 at 9 AM ET reaches Jersey City at local time — likely outside standard business hours.
History of the 551 area code
The 551 area code was introduced in 2001 when the North American Numbering Plan was first deployed. As Jersey City grew and number demand increased, overlay code 201 was added to serve the same geographic region — a common solution that avoids forcing existing subscribers to change their numbers.
Is the 551 area code safe? Spam and scam calls
551 is a legitimate geographic area code for Jersey City — it is not a scam code or a premium-rate prefix, and a call from a 551 number is most likely a genuine local caller. The risk is not the area code itself but a tactic called neighbor spoofing: scammers fake their caller ID so an unwanted call appears to come from your own area code, because people answer familiar numbers more readily.
If you get an unexpected 551 call, a few signals point to a likely scam — a pre-recorded message, urgent pressure to act now, a demand for payment by gift card or wire transfer, or anyone asking for passwords, Social Security, or account numbers. Let suspicious calls go to voicemail, never share personal information, and report fraud to the FTC at reportfraud.ftc.gov. The FCC consumer guide on spoofing explains your rights under the Truth in Caller ID Act. A real Jersey City business will leave a clear voicemail and will not pressure you.
US carriers verify caller ID with the STIR/SHAKEN framework, which flags many spoofed numbers as "Spam Likely" before they ring. DialPhone 551 numbers are registered for STIR/SHAKEN attestation, so calls from your business are verified as genuine and reach customers without a false spam label. See the DialPhone guide to VoIP security for more.
Why get a 551 area code number for your business?
Getting a 551 number gives your business three measurable advantages over a toll-free or out-of-area number:
- Local trust signal. Customers in Jersey City recognize 551 as their home area code. Caller ID matching builds immediate credibility for service businesses, sales outreach, and patient communication.
- Higher answer rate. Calls from a familiar local area code are answered far more often than unknown or toll-free numbers — industry measurements of local presence dialing put the lift at 20–40%, which matters most for outbound sales, appointment confirmations, and time-sensitive service callbacks.
- Targeted marketing. Businesses serving Jersey City and the broader Northeastern New Jersey can advertise a local number across print, radio, billboards, and digital channels for higher conversion than a national 800 number.
For businesses in Jersey City and surrounding cities, top industries that benefit from local 551 presence include Professional Services, Healthcare, and Retail. DialPhone's AI receptionist is available for every 551 number — never miss a call, even after standard business hours.
How to get a 551 area code number
Setting up a 551 business number with DialPhone takes under 10 minutes:
- Sign up for a DialPhone plan. Choose any plan starting at $24/user/month. Free 14-day trial, no credit card required.
- Search available 551 numbers. Filter the DialPhone number inventory by area code, city, or pattern.
- Choose your number and configure. Assign your new 551 number to a user or team, set up call routing, voicemail, AI receptionist, and business SMS.
- Port your existing number (optional). Already have a 551 number? Free number porting in 2 to 5 business days with zero service interruption.
New to local numbers? The complete guide to getting a local phone number covers choosing the right area code, porting an existing line, and avoiding spam flags.
551 area code overlay codes
The Northeastern New Jersey region is served by multiple overlay area codes:
| Area Code | Coverage |
|---|---|
| 551 | Primary area code for Northeastern New Jersey, assigned 2001 |
| 201 | Overlay — same geography (assigned 1947) |
All overlay codes serve the same Jersey City region. New subscribers may be assigned any available code; existing numbers retain their original prefix.
AI receptionist for 551 area code businesses
Every DialPhone 551 number includes optional AI receptionist coverage, available 24/7. The AI handles calls when your team is unavailable — answering common questions, booking appointments, routing urgent callers to on-call staff, and capturing voicemail with full transcription and intent tagging.
For businesses in Jersey City that handle high call volume, run extended hours, or need bilingual support (especially valuable in service areas with diverse customer bases), the AI receptionist reduces voicemail backlog and improves first-call resolution.
All area codes in New Jersey
New Jersey has 9 active geographic area codes. The 551 area code is part of the same numbering plan as the codes listed below — calls between them are typically local within the state, depending on the carrier.
Nearby area codes
Related area codes in New Jersey and the Eastern Time (ET) region:
- 201 area code — Jersey City, New Jersey
- 609 area code — Trenton, New Jersey
- 732 area code — New Brunswick, New Jersey
- 848 area code — New Brunswick, New Jersey
- 856 area code — Camden, New Jersey
- 862 area code — Newark, New Jersey
All New Jersey area codes → · Browse all US area codes →
More area codes: ← 541 Eugene · 559 Fresno →
How We Tested
DialPhone re-verifies every area code page every 90 days. Area code geography, timezone, and overlay data come from the official North American Numbering Plan Administration (NANPA) database. Pricing reflects the published DialPhone plan tiers — see the pricing page for current details. Number availability varies; check the DialPhone signup flow for live inventory in the 551 region.
What We Don't Like
- Number availability is finite. Popular Jersey City area codes can be inventory-constrained — request specific vanity patterns early.
- Porting timing varies. Most 551 ports complete in 2-5 business days; complex multi-line legacy contracts can take 7-10.
- HIPAA tier required for healthcare. The Core $24 plan doesn't include a BAA — healthcare users need Advanced ($34) or above.