480 Area Code: Phoenix, Arizona Time and the 2023 Overlay With 602 and 623

Where does 480 cover?

Many sources still describe 480 as the East Valley code. That was accurate from 1999 to 2023, when greater Phoenix was divided between three codes. NANPA's Planning Letter 576 sets out who had what before the change:

The Arizona Corporation Commission (ACC) then approved a boundary elimination overlay in Decision No. 78311 (November 2021). The lines between the three codes were removed, and from 12 September 2023 a new number with any of the three codes could be assigned anywhere in the combined area. The ACC notes that the 1999 split had divided the single Phoenix rate center between three codes, and the change made it one again.

Two consequences follow. A 480 number issued since late 2023 may belong to a line in Glendale or Buckeye. And the combined area is the old three-code footprint, not whole counties — Tucson and the rest of southern Arizona are still 520.

480 vs 602: is there any difference?

For a new number, not since 12 September 2023. Before that date the two codes marked different parts of the Valley. Now either can be issued anywhere in the combined area, and calls that were local stayed local.

Older numbers keep the code they were given, so 480 still leans East Valley and 602 leans central Phoenix among long-held lines. That's a tendency and no more. Don't use the code to guess whether a business is in Scottsdale or downtown.

What time is it in the 480 area?

Time zone is one of the most searched questions about 480. Arizona law sets the state's time to Mountain Standard Time and rejects daylight saving time, using the option federal law gives a state lying entirely in one time zone (15 U.S.C. 260a). Phoenix stays at UTC−7 all year.

Because the rest of the country moves its clocks, Phoenix lines up with different places in different seasons — the arithmetic follows directly from the UTC offsets:

If you schedule calls into Phoenix from another state, the mismatches happen while the rest of the country is on daylight saving time. The 720 area code guide covers Denver, which uses the same zone but does change its clocks.

How did Phoenix end up with three codes?

1. 1947

   602 covers all of Arizona

   One of the original area codes, per NANPA's area code database.

2. 1995

   520 splits off

   The rest of Arizona outside the Phoenix area moved to 520, in service from 19 March 1995.

3. 1999

   A double split

   On 1 March 1999, 480 took the East Valley and 623 the West Valley, leaving 602 with central Phoenix. NANPA's split letter kept calls between the three codes local.

4. 2001

   928 splits from 520

   Most of northern and western Arizona moved to 928 on 23 June 2001.

5. 2021

   480 goes to ten digits for 988

   480 was one of three Arizona codes on the FCC's 988 list. Ten-digit local dialing became mandatory on 24 October 2021.

6. 2023

   Boundaries removed

   602 and 623 moved to mandatory ten-digit dialing on 12 August 2023; from 12 September any of the three codes could be issued anywhere in the area.

The reason was 480's supply. NANPA projected 480 would run out of prefixes in the first quarter of 2024, while the ACC noted that 623 on its own would not have needed ten-digit dialing for about 48 more years. Pooling the three codes solved 480's shortage without a new code. NANPA's April 2026 exhaust analysis projects the combined 480/602/623 area to last until the fourth quarter of 2056.

How do you dial a Phoenix-area number?

Calls that were local before the change remain local.

480 lines had a head start: they switched in 2021 for 988, so the 2023 change mostly affected 602 and 623 numbers. If your business still has seven-digit entries in a phone system or dialler, our guide to area codes in call routing covers where they hide.

Is 480 a country code?

Searches for 480 are often phrased as "telephone code 480" or "480 country code". 480 isn't a country code. The US uses country code 1, and 480 follows it: from abroad, dial your exit code (or + on a mobile), then 1, then 480 and the seven-digit number — +1 480 XXX XXXX. The confusion is understandable: in the ITU's list, country code 48 belongs to Poland, so a number written +48… is Polish, not Arizonan.

Can you still get a 480 number?

Yes, though not by choosing it. Since the 2023 overlay, 480, 602 and 623 all cover greater Phoenix, and a new line is numbered from whichever of the three its carrier still holds prefixes in. Nothing reserves one code for new numbers, and nothing ties a code to a suburb any more.

That is the practical difference between an overlay and the 1999 split that created 480: the split moved existing numbers, the overlay leaves them alone and lets three codes share one map.

480 caller ID, spoofing and spam labels

A 480 number tells you which code its carrier drew from, not where the phone is. It is also not proof of who is calling — caller ID can be set to a number the caller has no connection to, which the FCC calls spoofing.

Arizona adds a wrinkle for anyone calling into 480 at scale. The state does not move its clocks, so for most of the year Phoenix sits an hour behind the rest of Mountain Time and level with the Pacific coast. A dialing window built from "Mountain Time" alone will start an hour early here for roughly eight months, and calls arriving before permitted hours are the kind that get reported.

What happens to the number itself is a route question. Terminating networks score calls on duration, volume and answer rate, and a label attached to a number survives a change of supplier. CLI vs NCLI routes covers whether your number arrives at all; buying USA CC routes covers the US-specific part for outbound campaigns.

Which other codes does Arizona use?

More codes, grouped by time zone, are in our area code guides. For an area still waiting on its first overlay, see 502 in north-central Kentucky.

480 area code FAQ

Sources

1. NANPA — Planning Letter 576: 480, 602 and 623 boundary elimination overlay (30 December 2021)
2. Arizona Corporation Commission — All about area codes
3. NANPA — Planning Letter NANP-153: 602 split creating 480 and 623 (1 February 1999; archived copy)
4. NANPA — Planning Letter 268: 520 split creating 928 (27 March 2001; archived copy)
5. NANPA — Planning Letter 556: 10-digit dialing transition for 988 (8 January 2021)
6. FCC — Area codes required to transition to 10-digit dialing (988)
7. NANPA — Area code (NPA) database, file dated 16 September 2026
8. NANPA — 2026-1 NPA exhaust analysis (April 2026)
9. Arizona Revised Statutes § 1-242 — Standard time
10. 15 U.S.C. 260a — Daylight saving time
11. ITU — List of ITU-T E.164 assigned country codes
12. FCC — Caller ID spoofing