Few things cause more head-scratching for anyone dealing with New Zealand numbers than seeing “04” pop up. It could be a landline in the capital region, a bank account prefix, or even a mislabeled mobile contact. This guide sorts out both meanings of 04 — the Wellington telephone area code and the ANZ bank identifier — so you never dial wrong or misunderstand your bank details.

4 related posts

Country code for New Zealand: +64 ·
Area code 04 region: Wellington metropolitan area ·
Number of digits after area code: 7 (e.g., 04 xxx xxxx) ·
Bank prefix 04: ANZ Bank New Zealand

Quick snapshot

1Confirmed facts
2What’s unclear
  • The exact boundary of the 04 local calling area for VoIP services may vary by provider (no single authoritative source)
3Timeline signal
4What’s next
  • Number portability allows keeping 04 numbers when moving within the region; check your provider

Five key facts about 04 — both as a telephone code and a banking number — are laid out below.

Label Value
Country Code +64
Area Code 04 Wellington region
Dialing Format (overseas) +64 4 xxx xxxx
Landline vs Mobile 04 = landline; 021 = mobile
Bank Prefix 04 ANZ Bank

The table shows the split identity of 04: one side belongs to the phone network, the other to the banking system.

What area code is 04 in New Zealand?

What does the 04 area code represent?

  • 04 is the area code for the Wellington region (excluding Wairarapa), assigned to landline numbers in the Wellington metropolitan area including Wellington city, Porirua, Lower Hutt, Upper Hutt, and the Kapiti Coast (Wikipedia (list of NZ dialling codes)).
  • The trunk prefix is 0, so from within New Zealand you dial 04 followed by the local number (Wikipedia).

The implication: 04 is your key to reaching anyone on a fixed line in the capital region. If you see a number starting with 04, it’s a Wellington landline, not a mobile or a toll-free number.

How do you dial a 04 number from abroad?

What is the correct international format for a Wellington number?

  • New Zealand country code is +64 (Revolut Australia (financial services provider)).
  • From overseas, dial +64 4 xxx xxxx (omit the leading 0) (Revolut Australia).
  • Example: +64 4 123 4567.
  • Mobile numbers use 02x codes (e.g., 021), not 04 (Revolut Australia).
The upshot

Anyone calling from Australia, the UK, or the US needs to replace the leading 0 with +64 4. Mistaking 04 for a mobile code is the most common dialing error — it costs nothing but a second attempt.

Two dialing scenarios, one rule: drop the 0 and add +64 4. Here is a step-by-step guide for both domestic and international calls.

Calling from within New Zealand

  1. Lift the receiver and dial 04.
  2. Then dial the 7-digit local number (e.g., 04 555 1234).
  3. No additional prefix is needed.

Calling from overseas

  1. Dial your country’s international access code (usually 00 or +).
  2. Then dial 64 (New Zealand’s country code).
  3. Then dial 4 (the area code 04 without the leading 0).
  4. Then dial the 7-digit local number.
  5. Full example: +64 4 555 1234.

The catch: New Zealand’s international prefix is 00, so from a landline you would dial 00 64 4 xxx xxxx (Wikipedia (NZ trunk and international prefixes)). On a mobile you can use the + key.

What NZ bank prefix is 04?

Which bank uses the prefix 04?

The pattern: 04 appears in two completely separate systems — telephone and banking — with no relation. The bank prefix 04 tells electronic payment systems “this account is at ANZ,” while the area code 04 tells the phone network “this line is in Wellington.”

Is 04 a landline or mobile area code?

What is the difference between landline and mobile codes in New Zealand?

  • 04 is a landline area code, not a mobile code (Revolut Australia (financial services provider)).
  • Mobile numbers in New Zealand start with 02 (e.g., 021, 022, 027) (Revolut Australia).
  • 04 numbers are exclusively for fixed-line telephones in the Wellington region.
  • If you see a number starting with 04, it is a landline.
The trade-off

WhatsApp and other apps sometimes label an 04 number as “mobile” if the contact imported it wrong. The network itself treats it as a landline — so if you’re sending an SMS, it may not arrive. Always verify with the owner whether the number is a fixed line.

Which New Zealand cities are covered by the 04 area code?

What towns and suburbs are within the 04 calling area?

  • The 04 area code covers the Wellington urban area including Wellington CBD, Porirua, Lower Hutt, Upper Hutt, and towns along the Kapiti Coast (e.g., Paraparaumu, Waikanae) (Wikipedia (list of dialling codes)).
  • It does not include Wairarapa, which has its own codes.
  • The local calling area also includes exchanges like Tawa, Johnsonville, Petone, etc. (Wikipedia (Wellington local calling area)).

Why this matters: if you live in Featherston or Masterton, your number will start with a different code (e.g., 06 for Wairarapa). The 04 area physically hugs the harbour and the Kapiti coast — about a 50 km stretch from Paekakariki down to Wellington’s southern suburbs.

What we know for sure — and what’s still fuzzy

Confirmed facts

  • 04 is the area code for Wellington, New Zealand.
  • 04 is the bank prefix for ANZ.
  • International format is +64 4.
  • Mobile codes are 02x, not 04.
  • 04 numbers are landlines only.

What’s unclear

  • The exact boundary of the 04 local calling area for VoIP services may vary by provider — no single authoritative map exists.

What the sources say

“Shorter codes were allocated to the largest centres — for example, 09 for Auckland, 04 for Wellington.”

— Wikipedia (community encyclopedia)

“Wellington area code is 04, dialed as +64 4 internationally.”

— Revolut Australia (financial services provider)

The paradox

The same two digits — 04 — govern both your phone connection to the capital and your bank routing within ANZ. One is geography, the other is finance. They never meet, but they share a number that causes confusion for thousands of callers and customers each year.

For New Zealanders and international callers alike, the 04 code signals a Wellington landline or an ANZ bank account. The implication is clear: if you’re dialing, drop the leading zero when overseas; if you’re reading a bank statement, 04 after the first two digits means your account is with ANZ. For anyone living in the Wellington region, your 04 number is portable within the area code’s footprint — but check with your provider if you move to the boundary. And for the occasional WhatsApp contact who shows up as “04xxx,” now you know: it’s probably a landline, not a mobile, so don’t expect an SMS reply.

Additional sources

moneyhub.co.nz, myguidewellington.com, myguidequeenstown.com, paymentsnz.co.nz

For international callers, understanding the New Zealand country code +64 is essential before dialing any local area code like 04.

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Frequently asked questions

Is the 04 area code toll-free?

No. 04 is a standard geographic area code for Wellington landlines. Calls to 04 numbers are charged at regular rates, not toll-free.

Can I keep my 04 number if I move outside Wellington?

It depends. Number portability generally lets you keep your number within the same area code region. If you move outside the 04 calling area, you may need to get a new local code. Check with your telecom provider.

What time zone is the 04 area code region in?

Wellington is in New Zealand Standard Time (NZST, UTC+12). During daylight saving (September to April) it shifts to NZDT, UTC+13.

How do I check if a number is a Wellington landline?

If the number starts with 04 (or +64 4 internationally), it is a Wellington landline. Mobile numbers start with 021, 022, 027, etc. You can also use online number lookup services.

What does 04 mean when shown in WhatsApp contacts?

WhatsApp may display an 04 number as “mobile” if the contact imported it with a country code. In reality, 04 is a landline code — the app’s display is based on formatting, not network type. Verify by asking the owner.

Are all numbers starting with 04 landlines even if listed as mobile by some services?

Yes, all numbers beginning with 04 are landlines in New Zealand’s numbering plan. If a service shows it as mobile, that’s a data error. The telecom network routes 04 numbers exclusively to fixed lines.

What is the difference between 04 and 09 area codes?

04 is Wellington’s area code; 09 is Auckland’s area code. Both are landline codes. From overseas, dial +64 4 for Wellington and +64 9 for Auckland (Revolut Australia).

Do New Zealand mobile numbers start with 04?

No. Mobile numbers in New Zealand start with 02 (e.g., 021, 022, 027). 04 is exclusively a landline area code.

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