619 Area Code: San Diego, Chula Vista and the 858 Overlay

Where does 619 cover?

The California Public Utilities Commission's 2017 decision describes the area 619 had held for two decades: "the southern portion of the City of San Diego and the adjacent cities of Chula Vista, Coronado, El Cajon, Imperial Beach, La Mesa, Lemon Grove, National City, Santee", plus unincorporated parts of the county. 858, by the same decision, held the northern part of the city with Del Mar, Poway, Solana Beach and a corner of Encinitas.

Those two areas were merged for numbering purposes in 2018. Any new line anywhere in the combined area can now be 619 or 858, so the old boundary only tells you where a number was issued before June 2018. A 619 number is still, in practice, more likely to be south of Interstate 8, but nothing guarantees it.

The decision also counts the rate centres — the local calling zones numbers are assigned to: eleven in 619, six of them serving the City of San Diego, and eight in 858, all of which serve the city. That is why the city's own numbers are a mix of both codes even for lines installed long before the overlay.

619 or 858: a split that was undone

Most area-code pairs are one of two things: a split, where a region is cut in two, or an overlay, where a second code is laid over the same region. 619 and 858 have been both. In June 1999, 858 was split out of 619 to take the north of the city. In June 2018 the line between them was erased and both codes began serving the whole area — what the CPUC calls a boundary-elimination overlay.

Why undo a split? Because 619 was running out and the alternatives were worse. NANPA's October 2016 forecast gave 619 until the fourth quarter of 2018. A brand-new third code would have forced ten-digit dialing anyway; a further split would have made people change their numbers. Sharing 858's spare capacity across the whole city cost nobody a number and was expected, per the decision, to last about seventeen years. The CPUC approved it as Decision 17-04-027 on 27 April 2017, and the industry set the dates: permissive dialing from 11 November 2017, mandatory 1+10 dialing from 19 May 2018, and the first 858 numbers in the old 619 area from 19 June 2018.

How do you dial a 619 number?

On a landline, 1 + 619 + the seven-digit number — for every call, including next door. That is California's standard overlay rule, and NANPA's planning letter for the overlay lists the local dialing plan as 1 + 10 digits. Mobile phones are more forgiving: carrier notices for the change told customers that cellular users may dial ten digits or 1 + ten digits.

The 1 does not make a call long distance; local rates did not change with the dialing rule. Nor was 619 part of the FCC's 2021 switch to ten-digit dialing for the 988 crisis line: that list covered codes that still allowed seven-digit calls, and the CPUC's list of affected California codes is 209, 530, 562, 626, 650, 707, 925, 949 and 951. San Diego had made its change three years earlier.

The federal Mountain–Pacific boundary follows the California–Arizona line, so the whole state, San Diego included, is Pacific. Clocks change on the second Sunday in March and the first Sunday in November.

A history of area code 619

San Diego has been renumbered more often than most cities, and once came within weeks of a code that was never used.

1. 1947

   Part of 213

   Southern California starts with one code. The CPUC's 2001 report on 619 traces the lineage back to it.

2. 1951

   714 splits off

   Everything south and east of Los Angeles — Orange County, San Diego and the desert counties — becomes 714.

3. 1982

   619 is created

   The southern half of 714 becomes 619, "created in 1982 from a geographic area code split off the original 714". It stretches from San Diego to the Nevada line, taking in Imperial, Inyo and Mono counties.

4. 1997

   760 takes the outer counties

   In March 1997 760 is split from 619, leaving 619 with San Diego and its suburbs.

5. 1998

   A three-way split is approved

   The CPUC's Decision 98-06-018 of 4 June 1998 orders a phased three-way split: 858 for the north of the city in 1999, then a third code, 935, for the east and south in 2000.

6. 1999

   858 goes live

   Permissive dialing from 12 June 1999, mandatory from 11 December. NANPA's database records 858 as in service from 12 June 1999, with 619 as its parent.

7. 2000

   935 is stopped

   Weeks before its scheduled start, the CPUC suspends the second phase "until further notice" on 4 May 2000; NANPA confirms in Planning Letter 230 that 935 will not begin. Number conservation had bought more time than expected, and 935 was never used in San Diego.

8. 2016–2017

   The boundary is erased

   NANPA applies in December 2016 to merge 619 and 858 into one overlay area. The CPUC agrees on 27 April 2017 and announces it on 1 May.

9. 2018

   Overlay in effect

   1+10 dialing becomes mandatory on 19 May; from 19 June 2018 new lines anywhere in the area may be 619 or 858.

Can you still get a 619 number?

Yes, from carriers that still hold 619 prefixes. New lines come out of whichever code a carrier has in stock, so a business ordering lines in Chula Vista today could receive 619 or 858 numbers, or a mix.

The overlay bought the area roughly two decades. NANPA's April 2026 exhaust analysis projects the combined 619/858 area to run out of prefixes in the third quarter of 2039, and the figure has been moving later with each report:

Each step carries the footnote "reduced historical and projected demand". No relief case is open for 619/858: NANPA's most recent California application, in February 2025, concerned 626 alone. When the time comes, a third code for San Diego would be a straightforward overlay on an area that already dials 1+10.

Is +619 a country code?

No. In the ITU's list of country codes, 61 is Australia, and country codes are designed so that no code is the start of another — so "+619" cannot exist. A number written +61 9 … is Australian; Telstra explains that the 09 range is now used for Internet-of-Things devices. San Diego is in country code +1, shared by the United States and Canada: from abroad, a 619 number is +1 619 followed by seven digits.

What surrounds 619?

Within the area, 858 is not a neighbour at all but the same territory under a second code. For the other California story of an overlay that was approved, shelved and revived, see the 510 area code guide; our Los Angeles guide covers 213, 323 and 738. All the guides are listed on the area codes page.

What a 619 number tells you about a caller

Where the number was first issued, and since 2018 not even which half of the city. A 619 mobile keeps its code when its owner moves to Phoenix, and caller ID can be set to a number the caller has no right to — the FCC calls this spoofing. "619" on a screen means a San Diego number, not a San Diego caller.

For a business calling out from 619, what the called party sees — the number intact, or a warning label — is decided by the route and the far-end network's scoring, not by the digits. Our guides to CLI vs NCLI routes and area codes and call routing cover that.

619 area code FAQ

Sources

1. CPUC — Decision 17-04-027: boundary elimination overlay for the 619 and 858 area codes (27 April 2017)
2. CPUC — Press release on the 619/858 overlay (1 May 2017)
3. NANPA — Planning Letter 507: 619/858 overlay dates and dialing plan (18 May 2017, archived copy)
4. Vonage — Customer notice on the 619/858 boundary elimination overlay
5. Cox — Customer notice on the 619/858 boundary elimination
6. CPUC Telecommunications Division — Report on the 619 area code (13 March 2001)
7. CPUC Telecommunications Division — Report on the 760 area code (10 October 2001)
8. NANPA — Planning Letter 128: three-way split of the 619 area code (30 June 1998, archived copy)
9. CPUC — Decision 00-05-025 suspending the second phase of 619 relief (4 May 2000)
10. NANPA — Planning Letter 230: suspension of the 935 area code (31 May 2000, archived copy)
11. CPUC — Press release on the 760/442 overlay (16 October 2008)
12. NANPA — Area code (NPA) database: in-service dates and parent codes
13. NANPA — 2026-1 NPA exhaust analysis (April 2026)
14. FCC — Area codes required to transition to 10-digit dialing for 988
15. CPUC — Area codes and numbering
16. ITU — List of ITU-T Recommendation E.164 assigned country codes
17. Telstra — 09 numbers
18. 49 CFR 71.9 — Boundary between the Mountain and Pacific time zones
19. FCC — What is a toll-free number and how does it work
20. FCC — Caller ID spoofing