The 225 area code is Baton Rouge, Louisiana, and the parishes around the state capital — Zachary to the north, Denham Springs and Livingston to the east, Gonzales and Donaldsonville down the Mississippi, Plaquemine across it, New Roads and St. Francisville upriver — carved out of 504 on August 17, 1998, and never overlaid.
Capital-region routine accounts for most 225s that arrive without a name: a state office, an LSU department, a river-corridor plant, a Gonzales contractor. A three-digit prefix was never built to vouch for whoever is dialing, and it still doesn’t.
225, the short version
| Item | 225 |
|---|---|
| First day of service | August 17, 1998 — assigned by NANPA on June 9, 1998 |
| Carved from | 504, Louisiana’s 1947 original, in a geographic split |
| Companion overlay | None — one code serves the whole footprint |
| Anchor communities | Baton Rouge, Zachary, Denham Springs, Gonzales, New Roads |
| How locals dial | Seven digits within 225; ten digits on local calls into a neighboring code; 1 plus ten on toll |
| Prefix runway | Third quarter of 2054, per NANPA’s April 2026 exhaust analysis |
Most area codes born in the late 1990s have since been overlaid, converted to ten-digit dialing, or both. Baton Rouge’s code has done neither. NANPA’s database lists exactly three planning letters against 225 — PL-123, PL-156 and PL-187 — and all three belong to the split that created it. Nothing on the record since 1999 has touched the map or the dialing plan.
The parishes inside the 225 line
The boundary was never a set of parish lines. Planning Letter PL-NANP-123 (June 9, 1998) explains that the New Orleans Local Access and Transport Area would keep 504 while the Baton Rouge LATA took the new code, and its attached map shows 225 as a wedge of south-central Louisiana with 318 wrapped around the north and west and 504 holding everything south and east of it.
The exchange list attached to that letter — current as of June 1, 1998 — spells out the roster. Baton Rouge itself, then Zachary and Jackson to the north; Clinton, Wilson, Tunica and St. Francisville in the Felicianas; New Roads, Morganza, Innis, Livonia and Rougon across the river in Pointe Coupee; Plaquemine, White Castle, Maringouin and Rosedale on the west bank; St. Gabriel, Dutch Town, Gonzales, Galvez, Sorrento and Donaldsonville along the river road; and Denham Springs, Livingston, Albany, Springfield, French Settlement and Maurepas to the east, with Greensburg and Montpelier up in St. Helena Parish.
Downriver, the LATA line put Convent, Lutcher and Vacherie in St. James Parish on the Baton Rouge side, while LaPlace and Reserve, the next exchanges toward New Orleans, stayed with 504. To the east, Hammond and Ponchatoula stayed with 504 as well — and when the 504 area code split again in 2001, Planning Letter PL-242’s map moved both into the new 985, along with LaPlace and Reserve. On the New Orleans side, Baton Rouge’s neighbor today is the 985 area code; to the north, the map reads 318, which NANPA’s database now lists as the 318/457 overlay complex — 457 in service since September 25, 2025.
All told, PL-123 moved 204 central office codes into 225, and 145 of them carried the Baton Rouge exchange name. One more sat outside Louisiana’s own LATA structure entirely: the 874 prefix in the North Cornor rate center, which the letter files under the Jackson, Mississippi LATA and flags as a cross-boundary code affected by the split.
The 1998 split, and the wireless prefixes that lagged it
By NANPA’s account in PL-123, BellSouth advised the administrator that number growth in Louisiana required relief for 504, and the Louisiana Public Service Commission approved a geographic split with a new 225 code introduced at the same time. NANPA’s database records the assignment on June 9, 1998 — the date on the letter — with service beginning August 17, 1998.
Three dates govern the cutover. July 17, 1998: every carrier was to have 225 activated across its network, and two test numbers became reachable — 225-291-6715 for the Baton Rouge LATA, 225-874-7712 for the Jackson LATA. August 17, 1998, a Monday, 12:01 a.m.: permissive dialing opened, with either 504 or 225 completing a call into the new territory. April 5, 1999, also a Monday, 12:01 a.m.: permissive dialing closed and misdialed calls went to intercept, the test line having been scheduled for disconnection on April 4, the day before.
Wireless carriers got longer. Planning Letter PL-NANP-156 (February 22, 1999) reminded the industry that mandatory dialing began April 5 — but that 31 qualifying Type II wireless prefixes had been granted an extended permissive period running to August 16, 1999, and that mandatory dialing on those codes should not be implemented before then. PL-NANP-187 (July 28, 1999), headed “Urgent Reminder,” listed the same 31 prefixes and set their cutover at 12:01 a.m. on August 16. That closed the paperwork a year after the split began.
PL-123 also ventured a forecast: the new 225 was expected to exhaust in about ten years, the trimmed-down 504 in about five. Keep that figure in mind for the exhaust section below.
Seven digits at home, ten across the line
The dialing plan PL-123 laid out for the Baton Rouge LATA is the one NANPA’s database still shows for 225 today. Local calls within the home code are dialed as seven digits with no prefix. Local calls to Extended Area Service points in a neighboring code take ten digits, no prefix. Toll calls, home code or foreign, take 1 plus ten digits, and operator-assisted calls take 0 plus ten. The letter carved out one exception for the North Cornor rate center, where foreign-code EAS calls stayed at seven digits and Expanded Local Calling Area points took 1 plus ten.
What kept the seven-digit habit alive through 2021 was absence from a list. When the FCC made 988 the three-digit crisis line in an order adopted July 16, 2020 (FCC 20-100), NANPA’s Planning Letter PL-556 (January 8, 2021, superseding PL-544) named the 82 area codes where seven-digit dialing and a working 988 central office code coexisted. Louisiana’s row read 337 and 504 — two codes, and 225 was not one of them.
So while New Orleans went to mandatory ten-digit dialing on October 24, 2021 under the national calendar — permissive from April 24, 2021, carrier cutovers complete by July 15, 2022, 988 live July 16, 2022 — Baton Rouge kept dialing seven. NANPA’s database records the same for 985, so the whole territory 504 shed in 1998 and 2001 still dials the short way while the city that kept the original digits does not.
An overlay would end that, since a second code on the same map forces ten digits for every local call. No overlay is planned, and the next section explains why one is unlikely for a very long time.
From a ten-year forecast to 2054
Twenty quarters in one revision: the October 2025 study had 225 exhausting in the third quarter of 2049, and NANPA’s 2026-1 NPA Exhaust Analysis — April 2026, utilization and central-office-code data as of March 1, 2026 — moved the last assignable prefix out to the third quarter of 2054, on what the study logs as reduced historical and projected demand.
The trend has run one way for years. Reading back through the forecast columns of the same report: second quarter of 2039 in the October 2023 study, first quarter of 2040 by April 2024, first quarter of 2042 by October 2024, first quarter of 2048 by April 2025, third quarter of 2049 by October 2025, and now 2054. The ten-year horizon PL-123 sketched in 1998 would have landed around 2008; the code is on course to outlast that guess by nearly half a century.
Nothing on NANPA’s operational reports contradicts the forecast. NANPA’s July 6, 2026 corrections to the April study ran four lines, every one of them a Texas code. The NPA Relief Planning Status Report dated August 30, 2026 lists twelve codes under planning, none in Louisiana, and the report of codes exhausting within 36 months names only 657/714, 828 and 956. In NANPA’s database, 225’s jeopardy and relief-planning columns both read no.
Within the state, 225 is not the tightest code either. The same April 2026 study puts 504 at the third quarter of 2061 and 985 at the second quarter of 2103; among Louisiana’s five entries only 337, in the southwest, carries an earlier date than Baton Rouge, and even that one sits in 2053.
Putting a Baton Rouge number to work
One code covers the capital-region market end to end, so a single set of 225 digits reads local from St. Francisville to Donaldsonville — a display that gets answered where an out-of-state number gets screened, the effect our local presence dialing guide quantifies. For a firm selling into state government, the university, or the river-corridor industrial base, the digits do real work on the first ring.
They do not, however, prove who is calling. Caller ID spoofing can dress a call from anywhere in Baton Rouge digits, which is why the durable signal is the attestation applied at the originating carrier rather than the number on the screen. SIPNEX signs outbound traffic at the A level with its own STIR/SHAKEN certificate, a credential a spoofed display cannot borrow.
The supply side is simple. SIPNEX operates under its own FCC carrier license — direct authorization, not resale — and provisions local DID numbers by rate center across the 225 footprint as inventory allows, delivering them into any PBX or dialer over SIP trunking. Toll-free numbers ride the company’s own RespOrg registration when a campaign wants both a local and a national face.
225 area code: what readers ask
Which Louisiana communities are in the 225 area code?
Baton Rouge and the parishes around it, from St. Francisville and New Roads down to Gonzales and Donaldsonville. NANPA’s Planning Letter PL-123 lists the exchanges that moved to 225 in 1998: Baton Rouge, Zachary, Jackson, Clinton, Wilson, St. Francisville, New Roads, Morganza, Innis, Livonia, Rougon, Maringouin, Rosedale, Plaquemine, White Castle, Tunica, St. Gabriel, Dutch Town, Gonzales, Galvez, Sorrento, Donaldsonville, Denham Springs, Livingston, Albany, Springfield, French Settlement, Maurepas, Greensburg, Montpelier, and — downriver in St. James Parish — Convent, Lutcher and Vacherie. Hammond and Ponchatoula are not included; they dial 985.
When did the 225 area code split from 504?
Permissive dialing began at 12:01 a.m. on August 17, 1998, and 504 stopped completing calls into the new territory on April 5, 1999. Per NANPA’s PL-123, the Louisiana Public Service Commission approved the geographic split after BellSouth reported that number growth required relief; NANPA assigned 225 on June 9, 1998, the date on that letter. Thirty-one wireless prefixes were allowed an extended permissive period to August 16, 1999, documented in PL-156 and PL-187.
Does the 225 area code use seven-digit or ten-digit dialing?
Seven digits for local calls inside 225 — NANPA’s database still lists the code that way. Local calls into a neighboring code take ten digits, toll calls take 1 plus ten. The 2021 conversion for the 988 crisis line did not apply: Planning Letter PL-556 named only 337 and 504 for Louisiana, because those were the state’s codes that both allowed seven-digit dialing and had 988 in use as a prefix. Only an overlay would change the rule, and none is planned.
How long before the 225 area code runs out of numbers?
Not soon — NANPA’s April 2026 exhaust analysis projects the third quarter of 2054. That is twenty quarters later than the October 2025 forecast, and the date has receded in every study since late 2023. The July 6, 2026 revisions covered four Texas entries only, and 225 appears on neither the relief-planning status report nor the 36-month exhausting list as of August 30, 2026. Nothing constrains new assignments.
How does a company outside Louisiana end up with a 225 number?
By ordering one from a carrier that holds Baton Rouge rate-center inventory. A number is tied to its rate center rather than to a street address, so it can be answered wherever the company’s phone system lives. SIPNEX provisions 225 DID numbers by rate center where inventory permits and routes them over SIP trunking into any PBX or dialer, under its own FCC carrier authorization. With exhaust projected in the 2050s, availability is a practical question rather than a regulatory one.
Capital-region callers pick up for capital-region digits. To get some: SIPNEX holds 225 rate-center numbers as a directly licensed FCC carrier, delivers them over dialer-grade SIP, and signs every outbound leg at the A level — rates are posted, the contact desk answers in writing, and (833) 665-2220 answers out loud.
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