The 413 area code is western Massachusetts — Springfield, Chicopee, Holyoke, Westfield, Northampton, Amherst, Greenfield, and Pittsfield, from the Connecticut River valley to the Berkshire hills at the New York line — a 1947 original that has never been split, never been overlaid, and still completes a local call on seven digits.
Valley or Berkshire routine — a Springfield office, a Northampton clinic, a Pittsfield contractor — is what a 413 you can’t place usually turns out to be. The three digits fix a number’s home exchange and nothing about the person dialing it.
413 as the record stands in 2026
| Attribute | Western Massachusetts’s 413 |
|---|---|
| Serving since | January 1, 1947 — assigned and placed in service the same day, one of the 86 codes NANPA’s NPA database dates to that morning |
| Ancestry | None — no parent code; Massachusetts opened with 413 in the west and 617 in the east |
| Sharing the map | Nothing. Never overlaid, never split, and the database lists no planning letter for it |
| Principal towns | Springfield, Holyoke, Northampton, Greenfield, Pittsfield |
| Dial pattern | Seven digits inside 413; ten digits on local calls into another code; 1 plus ten on toll calls |
| Projected empty | Third quarter of 2048 — NANPA’s 2026-1 NPA Exhaust Analysis, April 2026 |
Most area-code histories are a sequence of interventions. This one is a sequence of studies that found nothing to intervene in — and the studies themselves have been walking the exhaust date further away since 2024.
From the Connecticut River to the New York line
The territory is the western third of the state. Its spine is the Connecticut River: Springfield at the bottom, with Chicopee, Holyoke, and Westfield around it, then Northampton and Amherst upriver, and Greenfield near the Vermont line. West of the valley the road climbs into the Berkshires — Pittsfield at the center, North Adams at the top — before dropping to the New York border.
Every one of those cities lists its own city hall under the code — Springfield, Pittsfield, Northampton, Greenfield, Holyoke, Westfield, Amherst, Chicopee, and North Adams all publish 413 numbers on their municipal websites. To the east, 978 picks up at Athol and Orange, and the Worcester side of the line dials 508. Every 413 number keeps Eastern Time.
Two codes in 1947, and the one that stayed still
Massachusetts entered the numbering plan holding exactly two area codes, and NANPA’s NPA database dates them identically: 413 and 617, both assigned and in service on January 1, 1947. Both carry a 1 as the middle digit — under the original scheme, the marker of a state with more than one code, where a 0 meant a state served by a single code. The west took 413; everything from Worcester to the Cape took 617.
Every change the state has made since then has landed east of that line. NANPA records 508 assigned on July 2, 1987 and in service July 16, 1988, listing 617 as its parent. On September 1, 1997, two more splits landed on the same morning — 978 out of 508 and 781 out of 617, both assigned June 16, 1997. And on May 2, 2001, four overlays went live at once under Planning Letter PL-234: 774 over 508, 857 over 617, 339 over 781, and 351 over 978, all assigned May 3, 2000.
That is seven area codes descended from one 1947 original, while the other 1947 original has produced none. The database entry for 413 shows a blank parent column, an overlay column that reads No, a blank planning-letter column — and no other code anywhere in the file names 413 as the code it was cut from.
Why has the 413 area code never changed?
Because it never had to. Relief projects are triggered by prefix demand, and the western third of Massachusetts has never drawn numbers fast enough to trip one; the state’s three splits and four overlays were all answers to growth in Boston’s orbit. How a split differs from an overlay — and why overlays became the standard remedy after the 1990s — is laid out in our guide to how area codes work.
The company 413 keeps is small. Of the 86 codes NANPA’s database shows in service on January 1, 1947, only six still combine no overlay, no listed descendant, and a seven-digit home dialing plan: Maine’s 207, Wyoming’s 307, Rhode Island’s 401, North Dakota’s 701, Iowa’s 712, and 413. Four of those are single-code states. Only 712 and 413 have managed it inside a state that has other area codes — and 413 did so beside one of the busiest numbering markets in the Northeast.
Seven digits west, ten digits all around
NANPA’s current dialing entry keeps the seven-digit local dialing 413 has had from the start: seven digits on a local call within 413, ten digits on a local call that crosses into another code, and 1 plus ten on toll calls. The permissive-dialing columns read “NA” — no transition is underway, and the relief-planning flag is set to No.
Look across any of the code’s borders and the pattern flips. New York’s 518, Vermont’s 802, New Hampshire’s 603, and Connecticut’s 860 all list ten-digit local dialing in NANPA’s database, and so do the 351/978 and 508/774 complexes on the Massachusetts side, which lost seven digits at 12:01 a.m. on April 2, 2001 ahead of their overlays. In the western third of the state, seven digits still complete the call.
The 988 transition passed it by as well. Planning Letter PL-556 — January 8, 2021, superseding PL-544 — listed the 82 area codes in which a 988 central office code was in use alongside seven-digit dialing, and moved them to ten digits: permissive from April 24, 2021, mandatory October 24, 2021, carrier network changes done by July 15, 2022, with the 988 crisis line live nationwide on July 16, 2022. Its state-by-state table has no Massachusetts row. 413 is now the only code in the state that still dials seven, and NANPA’s database lists no planning letter — conversion or otherwise — against it.
2048, fourteen years later than 2034
NANPA’s 2026-1 NPA Exhaust Analysis (April 2026), built on NRUF and central-office-code data as of March 1, 2026, projects 413 out of assignable prefixes in the third quarter of 2048. The figure sits two quarters past the October 2025 study’s first quarter of 2048, and the report footnotes it to reduced historical and projected demand.
The forecast-history columns tell the longer story. The October 2023 and April 2024 studies both projected the fourth quarter of 2034; October 2024 moved it to the fourth quarter of 2037; April 2025 to the first quarter of 2043; October 2025 to the first quarter of 2048; and April 2026 to the third quarter of that year. Six consecutive studies, and the projected exhaust has moved fourteen years further out — all on a single, never-relieved pool.
The revision reordered the state’s queue. In the October 2025 study, 413 held Massachusetts’s earliest projected exhaust; the April 2026 edition put the 508/774 complex ahead at the fourth quarter of 2045, with 413 second at 2048. Boston’s 617/857 pair runs to the third quarter of 2066, and NANPA prints the 339/781 and 351/978 pools as “100+” — beyond the study’s hundred-year horizon.
Nothing is filed against any of it. The four entries NANPA revised on July 6, 2026 all sit in Texas; Massachusetts was untouched. NANPA’s NPA Relief Planning Status Report of August 30, 2026 carries twelve area codes, none of them in the state, and NANPA’s companion report of codes exhausting within 36 months names only California’s 657/714, North Carolina’s 828, and Texas’s 956. In the NPA database, 413 is neither in jeopardy nor in relief planning.
A Springfield display, a Pittsfield display
For an outbound operation, an undivided code is a commercial asset. A Holyoke homeowner or a Northampton shop owner reads 413 as a neighbor and any other three digits as a stranger, and there is no overlay to blur the signal — the code has meant the same ground for seventy-nine years. Local presence dialing puts numbers to what that recognition does when the phone rings.
The digits cannot vouch for the dialer: Caller ID spoofing can write 413 on a call from anywhere, which is why the signal that holds up is the attestation the originating carrier signs into the call under STIR/SHAKEN, not the display itself.
SIPNEX signs at that level directly. An FCC-licensed carrier rather than a reseller, it stocks local DID numbers by rate center — Springfield, Pittsfield, Northampton, or any 413 exchange with inventory — delivers them over SIP trunking to whatever PBX, softphone, or dialer already answers, and applies A-level attestation under its own STIR/SHAKEN certificate. Toll-free service rides the same account through SIPNEX’s RespOrg registration.
What the valley wants to know about 413
Which Massachusetts cities and towns use the 413 area code?
Springfield, Chicopee, Holyoke, Westfield, Northampton, Amherst, Greenfield, Pittsfield, and North Adams — western Massachusetts from the Connecticut River valley to the Berkshires. Each of those cities publishes a 413 number for its own city hall. The code ends where 978 begins at Athol and Orange and where the Worcester side of the state dials 508; the whole territory keeps Eastern Time.
Has the 413 area code ever been split or overlaid?
Never — 413 is one of two codes Massachusetts started with in 1947, and it is the one nothing has happened to. NANPA’s NPA database lists no parent, no overlay, and no planning letter for it, and no other code in the file descends from it. Every Massachusetts relief project — the 508 split of 1988, the 978 and 781 splits of 1997, and the four overlays of 2001 — traces back to 617 instead.
Is western Massachusetts still on seven-digit dialing?
Yes — NANPA’s database lists seven-digit dialing for local calls within 413, the last Massachusetts code where that is true. Local calls into a neighboring code take ten digits, and toll calls take 1 plus ten. The 2021 conversions tied to the 988 crisis line never reached it: Planning Letter PL-556 named 82 area codes and no Massachusetts entry, so 413 kept its seven-digit local dialing.
Is 413 anywhere near running out of numbers?
Third quarter of 2048, on NANPA’s April 2026 projection — twenty-two years out, with no jeopardy declared and no relief planning open. The date has only receded: the October 2023 and April 2024 studies both said late 2034; every edition since has pushed it later, and the latest step is footnoted to reduced demand. The 508/774 complex, projected for late 2045, now stands ahead of 413 in the state’s queue.
Do you need a Springfield or Pittsfield address for a 413 number?
No. Assignment is by rate center, not by street address, so 413 digits can ring in any state over SIP. SIPNEX provisions local DIDs exchange by exchange — Springfield, Pittsfield, Northampton, and the rest as inventory allows — and routes them into the phone system already in place under its own FCC carrier authorization, with every outbound call signed at A-level attestation.
Seventy-nine years on one set of digits, from the river valley to the hill towns — and a business anywhere can hold a few of them. SIPNEX provisions 413 rate-center numbers as a directly licensed FCC carrier, delivers them over SIP trunks sized for outbound volume, and signs every outbound leg with its own STIR/SHAKEN certificate; current DID and trunking rates are posted, the provisioning desk answers email, and (833) 665-2220 answers the phone.
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