Few countries make you think twice about a single digit, but in New Zealand, the “04” at the start of a phone number tells a story about where someone is, how they’re connected, and how you should reach them—it’s the calling code for the Wellington region, a fixed-line landmark in a mobile-first world. This guide breaks down what 04 means, how to dial it correctly from anywhere, and how to tell a Wellington landline from a mob—or from a scammer—before you even pick up the phone.
Country code for New Zealand: +64 · 04 area code region: Wellington (excluding Wairarapa) · 04 area code type: Landline (fixed-line) · Domestic dialing: 04 + 7-digit number
“04 is the landline area code for the Wellington region, excluding Wairarapa.” — financial platform Revolut’s calling guide
Quick snapshot
- 04 is the landline area code for the Wellington region, excluding Wairarapa (financial platform Revolut’s calling guide).
- Covers Wellington city, Lower Hutt, Upper Hutt, Porirua, and surrounding areas (Wikipedia’s dialling codes page).
- Mobile numbers in NZ start with 02, not 04 (Wikipedia’s telephone numbering plan).
- Whether a specific 04 number has been ported to a mobile device (Wikipedia’s telephone numbering plan).
- Exact boundary of the 04 region in rural areas near Wairarapa (Sent’s telecom guide).
- Whether the Kāpiti Coast district is fully included in 04 (some guides include it, others exclude Ōtaki) (Sent’s telecom guide).
- 04 has been a long-standing landline code; mobile numbers use 02 prefixes, a distinction that persists today (Wikipedia’s telephone numbering plan).
- Number portability means a landline 04 number could be served by a mobile network, so always verify before calling back (Kiwi Press guide).
“Mobile numbers in NZ start with 02, not 04.” — Wikipedia’s telephone numbering plan
| Label | Value |
|---|---|
| Area code | 04 |
| Region | Wellington (excluding Wairarapa) |
| Type | Landline (fixed-line) |
| Domestic dialing | 04 + 7-digit number |
| International dialing | +64 4 + 7-digit number |
| Trunk prefix | 0 |
New Zealand’s numbering plan is compact, and 04 is just one piece. The pattern: a trunk prefix (0) plus area code and local number, with mobile numbers living on a separate 02 prefix.
Where is 04 area code in NZ?
The 04 area code is tied to the Wellington region, but the details matter for anyone dialing in or trying to identify a caller. Here’s the breakdown.
Geographic coverage of 04
- The 04 code covers Wellington city and the surrounding urban area, excluding the Wairarapa region.
- This includes Lower Hutt, Upper Hutt, Porirua, and the city itself.
- Wairarapa (e.g., Masterton) uses the 06 area code instead.
Wellington’s own boundary is narrower than many assume. The Wairarapa may be part of the region administratively, but it’s not part of the 04 calling area—a distinction that trips up both locals and newcomers.
Wellington area code map overview
- Reference lists from Wikipedia’s dialling codes associate the 04 area with Wellington and nearby cities like Porirua.
- Some guides, like Kiwi Press, describe the coverage as “the Wellington metropolitan area,” a practical shorthand for callers.
The implication: If you see an 04 number, you’re looking at a Wellington-region landline, not a mobile—unless porting has occurred.
Is 04 a landline?
The short answer is yes, but the rise of number portability complicates things. Here’s how to tell for sure.
Landline vs mobile in NZ area codes
- In New Zealand, area codes beginning with 0 (like 04, 09, 03) are landline prefixes per Wikipedia’s telephone numbering plan.
- Mobile numbers start with 02 (e.g., 021, 022, 027), followed by 6-8 digits.
- Due to number portability, a landline number can be moved to a mobile service, but the prefix remains 04, making identification via prefix alone unreliable.
How to tell if a number starting with 04 is a landline
- Look up the number in a reverse-phone directory; if it’s ported, the listing will show “mobile” or “landline” instead of the area.
- Text the number; typically, only mobiles receive texts, so a reply can confirm it’s a mobile.
- Call from a mobile; if the call connects via landline quality (and the recipient mentions being at home), it’s likely a landline.
Bottom line: 04 numbers are landline by design, but portability means the prefix alone isn’t a guarantee. You should assume landline, verify by calling, and never share personal details with an unknown caller.
How do I call a +64 number?
Dialing New Zealand from abroad requires a few steps, and the process is straightforward once you know the sequence. Here’s the exact method.
Calling from overseas (including Australia)
- Start with the international exit code (e.g., 0011 from Australia or the USA, 00 from many other countries).
- Add New Zealand’s country code, +64.
- Drop the leading 0 from the area code. So, for a Wellington number, dial +64 4 followed by the local number.
For a Wellington landline like 04 555 1234, you’d dial 0011 64 4 555 1234 from Australia, a pattern confirmed by BubblyPhone’s calling guide.
Getting the exit code wrong is the most common error. Using 0011 instead of 64 will connect you to an Australian number, not New Zealand—a costly mistake for businesses.
Calling from within New Zealand
- For local calls, dial the area code (04) followed by the 7-digit number.
- From a mobile in NZ, you generally include the area code even for local calls, as per Sent’s telecom guide.
Bottom line: When calling internationally, you must drop the zero and use +64 4; domestic calls keep the zero. Mixing them up will result in a wrong number.
How does a New Zealand number look like?
Understanding the format of a Kiwi number helps with both dialing and identification. Here’s the anatomy.
Standard landline number format
- Landlines: area code (e.g., 04) + 7-digit local number (e.g., 555 1234).
- Example: 04 555 1234 domestically.
- Internationally: +64 4 555 1234 (without the leading zero).
Mobile number format
- Mobiles: 02x + 6-8 digits, such as 021 555 1234.
- International: +64 21 555 1234.
International representation
- The country code +64 is the standard way to present a New Zealand number to an international audience.
- When writing a number for a global audience, use +64 4 555 1234, not 64 4, as the latter omits the trunk prefix.
Bottom line: For a Wellington number, you should use the format 04 555 1234 (domestic) and +64 4 555 1234 (international). A 02 prefix signals a mobile, not a landline.
What are the area phone codes in New Zealand?
New Zealand uses a handful of geographic area codes for landlines, each with a clear regional identity. Here’s the full picture.
List of main area codes (03, 04, 06, 07, 09)
- 03: South Island (Canterbury, Otago) — financial platform Revolut’s calling guide
- 04: Wellington region (excluding Wairarapa) — financial platform Revolut’s calling guide
- 06: Lower North Island (Hawke’s Bay, Taranaki, Manawatu)
- 07: Waikato, Bay of Plenty
- 09: Auckland
Special codes: 0508, 0800, 0900
- 0508: A toll-free number for calling within NZ, often used by businesses.
- 0800: Another toll-free prefix, widely used for customer service.
- 0900: A premium-rate service number, typically costing more to call.
Changes and historical codes (05, 02)
- 05 was historically a South Island mobile code, but it’s now inactive or reassigned, per Sent’s telecom guide.
- 02 is the mobile prefix (e.g., 021, 022), not a geographic code.
- The 04 code has been stable for decades, but number portability can shift a landline to a mobile network.
Bottom line: The key distinction is geographic (landlines) versus network (mobiles). A 04 prefix means Wellington; a 02 means wireless.
Is 04 the same as +64 in New Zealand?
This is a common point of confusion. Here’s how the two relate.
No, 04 is the trunk prefix plus area code used domestically, while +64 is the international country code. Both refer to the same place but serve different purposes in dialing.
What’s the difference between 04 and +64?
- 04 is the national dialing prefix for Wellington landlines.
- +64 is the country code for New Zealand, used when calling from abroad.
- To call a Wellington number from overseas, drop the 0 and use +64 4.
Dialing 04 instead of +64 from abroad won’t connect you; you’ll get a busy signal or an error because the 0 is a trunk prefix valid only within NZ.
Bottom line: 04 is for local dialing, +64 is for international. If you mix them up, you will not connect.
How do I call New Zealand from Australia?
Calling across the Tasman is common, but the process has a few twists. Here’s a step-by-step guide.
Step-by-step dialing from Australia
- Dial Australia’s exit code: 0011.
- Add NZ country code: 64.
- Drop the leading zero of the area code.
- Dial the local number (7 digits).
Example: For a Wellington number 04 555 1234, dial 0011 64 4 555 1234.
Common mistake: Using 04 instead of 64
- A common error is dialing 04 4 555 1234, which misconstrues the area code as part of the international format.
- Remember: 04 is the domestic prefix; 64 is the country code.
Bottom line: For Australians, the pattern is 0011 + 64 + 4 + local. It’s a small change that avoids a big misdial.
Is 04 area code mobile or landline in NZ?
We’ve touched on this, but it’s worth a clear statement. The answer is nuanced due to porting.
04 as a landline prefix
- 04 is a landline area code, per financial platform Revolut’s calling guide and other tier-2 sources.
- It’s used for fixed-line services in the Wellington region.
Number portability and 04
- Mobile number portability allows a landline number to be transferred to a mobile network.
- This means you might encounter an 04 number that’s answered on a mobile, but the prefix itself is a landline relic.
Businesses often keep 04 numbers after switching to VOIP or mobile, so don’t assume it’s a landline—just dial it.
Bottom line: 04 is officially a landline code, but porting can make it a mobile in practice. You can identify it with a call or a lookup.
How to call 04 numbers from a mobile in NZ
Calling a local landline from your mobile is straightforward, but there are a few nuances.
Dialing from a NZ mobile
- Dial 04 + 7-digit number, even if you’re calling from a mobile and the number is local.
- No need for +64 or 0011.
Dialing from an Australian mobile
- Dial the international number: +64 4 + 7-digit number.
- Do not dial 04 from abroad; the zero is a domestic trunk prefix.
From a mobile, it’s simple: domestic calls use 04, international use +64 4. Just don’t mix them.
Bottom line: A mobile in NZ dials 04 locally; a mobile in Australia dials +64 4. The golden rule: drop the zero for international.
reddit.com, en.wikipedia.org, en.wikipedia-on-ipfs.org, sent.dm, krispcall.com, callhippo.com, mycountrymobile.com
Frequently asked questions
What is the 04 area code for Wellington?
The 04 area code is used for landlines in the Wellington region, covering the city and surrounding areas, but not Wairarapa, which uses 06.
Is +64 4 the same as 04?
No, +64 4 is the international format, while 04 is the domestic format. Both route to the same landline, but for international calls, you must drop the leading zero and use +64.
What should I do if I get a missed call from an 04 number?
Look up the number on a reverse-phone directory to verify who called. If it’s a Wellington landline, it could be a business or a scam; a quick search helps.
Does the 04 area code include Wairarapa?
No, Wairarapa (e.g., Masterton) uses the 06 area code, not 04. The 04 code specifically excludes Wairarapa.
Can a 04 number be a mobile?
Yes, due to number portability, a landline 04 number can be moved to a mobile network, so the prefix alone is not a guarantee. Always verify before calling back.
What is the correct international dialing format for 04 numbers?
Dial the exit code (e.g., 0011 from Australia), then 64, then 4, then the local number. Example: 0011 64 4 555 1234.