201 Area Code: New Jersey's First Number

The 201 area code is northern New Jersey — Jersey City, Hoboken, Hackensack, and the rest of Hudson and Bergen counties, directly across the river from Manhattan. It was the first code in AT&T’s original 1947 numbering plan, and it has shared its territory with the 551 overlay since December 2001.

No other area code carries 201’s paperwork distinction. When the North American Numbering Plan was drawn up, New Jersey’s code came first in the book — and four years later a 201 telephone placed the first customer-dialed long-distance call in history. The code that once covered the entire state now covers its densest, most New York-facing corner.

Where 201 works today

After decades of splits, 201 is a compact code: Hudson and Bergen counties, the strip of New Jersey pressed against the Hudson River. Jersey City, Hoboken, Bayonne, Union City, and Secaucus on the Hudson side; Hackensack, Teaneck, Fort Lee, and Englewood in Bergen.

It is the code of the George Washington Bridge approach, the Jersey City financial waterfront that earned the nickname “Wall Street West,” and the commuter belt that empties into Manhattan every morning. The 212/646 stack sits directly across the river — a 201 number is the New Jersey half of the same metropolitan conversation.

The first area code — and the first direct-dialed call

When AT&T and Bell Laboratories carved the US and Canada into 86 numbering plan areas in 1947, New Jersey drew 201, the plan’s first assignable code, covering the whole state. Our guide to how area codes work covers the system that assignment inaugurated.

The code made history again on November 10, 1951, when the mayor of Englewood — a Bergen County town still in 201 today — dialed ten digits and reached the mayor of Alameda, California, in about eighteen seconds. It was the first customer-dialed long-distance call ever placed: Direct Distance Dialing, and with it the practical use of area codes, started on a 201 line.

Three splits, one shrinking map

Statewide coverage did not survive New Jersey’s growth. In 1957, area code 609 took the southern half of the state — Trenton, the Philadelphia suburbs, and the southern shore.

In November 1990, the 908 split carved off north-central New Jersey, including Union, Somerset, Hunterdon, and Warren counties; the permissive-dialing window closed on June 8, 1991, after which the old code no longer worked there. Then on June 1, 1997, area code 973 took Newark, Paterson, and the Essex, Passaic, Morris, and Sussex county territory around them.

What remained of the first area code was Hudson and Bergen counties — the same riverfront footprint 201 holds today. Like Sacramento’s 916, the original code ended up defined by a fraction of its original ground.

551: the overlay across North Jersey

Even the trimmed footprint kept consuming numbers, and regulators chose an overlay rather than a fourth split. Mandatory ten-digit local dialing arrived on December 1, 2001, and area code 551 entered service on December 29, 2001, layered over the identical Hudson–Bergen territory.

Overlay rules apply as they do everywhere: no existing 201 number changed, 551 fills new demand as 201 prefixes deplete, and the two codes cost and route identically. A 551 number is simply a newer North Jersey number. There is no third code on the horizon, either — NANPA’s October 2025 exhaust analysis projects the 201/551 pool lasting until roughly the first quarter of 2046.

What a 201 caller ID actually proves

Nothing, on its own. Because 201 is the code of banks’ back offices, hospitals, and school districts serving two dense counties, a spoofed 201 display is a natural costume for impersonation calls — and caller ID can be forged outright, down to a display that mirrors your own prefix.

The defense is the callback habit: give an inbound caller nothing sensitive, look up the organization’s published number, and dial it yourself. A genuine Jersey City bank or Hackensack medical office survives independent verification; a spoofer does not.

A North Jersey number for your business

Businesses selling into the New York metro from the Jersey side — or reaching Hudson and Bergen county customers from anywhere — treat a 201 number as the local front door. Financial firms, logistics operators around the Bayonne and Jersey City port terminals, and multi-market companies routinely hold North Jersey numbers without North Jersey offices; for the answer-rate math behind that choice, see our local presence dialing guide.

SIPNEX provisions DID numbers by rate center across the 201/551 region and every US market, backs them with SIP trunking built for serious call volume, and puts A-level STIR/SHAKEN attestation, signed under its own certificate, on every outbound call — the trust signal a spoofed 201 can never carry.

Frequently asked questions

SIPNEX is an FCC-licensed carrier providing local DID numbers in North Jersey and every US market, toll-free numbers as a registered RespOrg, and dialer-grade SIP trunking — every call signed with our own STIR/SHAKEN certificate. Talk to an operator or call (833) 665-2220.