Katoomba: landline numbers and carriers
Katoomba is one of the town-level numbering areas the ACMA register uses under area code 02 (NSW & ACT). The register lists 42 number blocks for it with about 111,000 allocated numbers, held by 22 carriers, all under the 0247… dialling prefix. That makes Katoomba the 39th largest of 576 numbering areas under 02 by block count, with 0.26% of the area code's allocated numbers. A landline that calls you from one of these blocks was issued for the Katoomba area — though the line may since have been ported, and caller ID can be spoofed.
Source: ACMA register, data as of 15/10/2026
Where Katoomba is
- State or territory
- New South Wales
- Council area
- Blue Mountains
- Local time
- — AEST, UTC+10; AEDT, UTC+11 in summer
- Number format
- 02 47xx xxxx; from overseas +61 2 47xx xxxx
Locality, council and state: ABS ASGS Edition 3 (CC BY 4.0). Distances are straight-line between localities.
How Katoomba was numbered
The oldest block in Katoomba was allocated on 30 June 1991 and is held today by TELSTRA LIMITED; the newest on 1 October 2026 to TWILIO AUSTRALIA PTY LTD. Most of the area's blocks — 10 of 42 — date from 2005–2009, but allocations here span 35 years. 28 of the blocks are the standard 1,000-number size, 1 are 100-number blocks of the kind the ACMA has issued to VoIP and wholesale carriers since the mid-2000s, and 4 are 10,000 numbers or larger. 11 allocated blocks have changed hands since they were first issued: the register still names AAPT LIMITED, ENGIN PTY LIMITED, GOTALK LIMITED, HUTCHISON TELECOMMUNICATIONS (AUSTRALIA) LIMITED, IPTEL PTY LIMITED, IVOX PTY LTD, POWERTEL LIMITED and RSL COM AUSTRALIA PTY LIMITED as original allocatees of blocks now held by other carriers.
| Period | Blocks allocated |
|---|---|
| 1990–1994 | 5 |
| 1995–1999 | 1 |
| 2000–2004 | 4 |
| 2005–2009 | 10 |
| 2010–2014 | 2 |
| 2015–2019 | 6 |
| 2020–2024 | 9 |
| 2025–2029 | 5 |
The carriers in Katoomba
TELSTRA LIMITED holds the largest share here with 53.2% of allocated numbers across 6 blocks; TPG TELECOM LIMITED is second with 9%, and 20 other carriers hold the rest. TELSTRA LIMITED has the longest tenure, with a block dated 30/06/1991; TWILIO AUSTRALIA PTY LTD received the newest, on 01/10/2026. TPG TELECOM LIMITED (1), SYMBIO NETWORKS PTY LTD (6) and SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED (1) hold blocks originally allocated to another carrier.
| Carrier | Blocks | Numbers | Share | First block | Latest block |
|---|---|---|---|---|---|
| TELSTRA LIMITED | 6 | 59,000 | 53.2% | 30/06/1991 | 02/03/2020 |
| TPG TELECOM LIMITED | 1 | 10,000 | 9% | 24/08/1998 | 24/08/1998 |
| OPTUS NETWORKS PTY LIMITED | 5 | 9,700 | 8.7% | 06/06/2005 | 28/08/2020 |
| SYMBIO NETWORKS PTY LTD | 8 | 7,300 | 6.6% | 12/11/2004 | 19/08/2026 |
| SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 2 | 4,000 | 3.6% | 30/03/2000 | 14/07/2016 |
| PRIMUS TELECOMMUNICATIONS PTY LIMITED | 3 | 3,000 | 2.7% | 24/12/2004 | 03/02/2012 |
| NETSIP PTY LTD | 2 | 2,000 | 1.8% | 14/02/2018 | 26/10/2021 |
| OPTUS MOBILE PTY LIMITED | 1 | 2,000 | 1.8% | 29/10/2007 | 29/10/2007 |
| ADARGA PTY LTD | 1 | 1,000 | 0.9% | 16/09/2025 | 16/09/2025 |
| AGILE PTY LTD | 1 | 1,000 | 0.9% | 03/04/2007 | 03/04/2007 |
| C2A INTERNET.COM.AU PTY. LTD. | 1 | 1,000 | 0.9% | 13/07/2023 | 13/07/2023 |
| CHECK TECHNOLOGY GROUP PTY LTD | 1 | 1,000 | 0.9% | 31/01/2022 | 31/01/2022 |
| CHIME COMMUNICATIONS PTY LTD | 1 | 1,000 | 0.9% | 14/07/2004 | 14/07/2004 |
| LMGPS LTD | 1 | 1,000 | 0.9% | 23/11/2023 | 23/11/2023 |
| NETERA PTY LTD | 1 | 1,000 | 0.9% | 24/10/2025 | 24/10/2025 |
| PIPE INTERNATIONAL (AUSTRALIA) PTY LTD | 1 | 1,000 | 0.9% | 25/07/2007 | 25/07/2007 |
| PIPE NETWORKS PTY LIMITED | 1 | 1,000 | 0.9% | 13/03/2024 | 13/03/2024 |
| PIVOTEL SATELLITE PTY LIMITED | 1 | 1,000 | 0.9% | 16/04/2025 | 16/04/2025 |
| THE TRUSTEE FOR READING FAMILY TRUST | 1 | 1,000 | 0.9% | 21/10/2019 | 21/10/2019 |
| TWILIO AUSTRALIA PTY LTD | 1 | 1,000 | 0.9% | 01/10/2026 | 01/10/2026 |
| VIRTUTEL PTY LTD | 1 | 1,000 | 0.9% | 20/12/2015 | 20/12/2015 |
| WHY PAY MORE 4 LESS PTY LTD | 1 | 1,000 | 0.9% | 10/05/2018 | 10/05/2018 |
Number blocks registered for Katoomba
Every registered block for this area is allocated to a carrier. All 42 blocks, ascending:
| Block start | Numbers | Original allocatee | Current holder | Allocated | Transferred |
|---|---|---|---|---|---|
| 0247000000… | 3,000 | IPTEL PTY LIMITED | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 30/03/2000 | 01/12/2004 |
| 0247009000… | 1,000 | = | CHIME COMMUNICATIONS PTY LTD | 14/07/2004 | — |
| 0247030000… | 1,000 | ENGIN PTY LIMITED | PRIMUS TELECOMMUNICATIONS PTY LIMITED | 24/12/2004 | 11/08/2015 |
| 0247035000… | 1,000 | TWILIO AUSTRALIA PTY LTD | SYMBIO NETWORKS PTY LTD | 24/09/2020 | 15/10/2020 |
| 0247036000… | 1,000 | = | SYMBIO NETWORKS PTY LTD | 19/06/2020 | — |
| 0247040000… | 1,000 | = | PRIMUS TELECOMMUNICATIONS PTY LIMITED | 23/05/2005 | — |
| 0247044000… | 100 | = | OPTUS NETWORKS PTY LIMITED | 06/06/2005 | — |
| 0247044100… | 300 | OPTUS NETWORKS PTY LIMITED | SYMBIO NETWORKS PTY LTD | 06/06/2005 | 17/06/2011 |
| 0247044400… | 600 | = | OPTUS NETWORKS PTY LIMITED | 06/06/2005 | — |
| 0247057000… | 1,000 | = | NETSIP PTY LTD | 26/10/2021 | — |
| 0247058000… | 1,000 | = | AGILE PTY LTD | 03/04/2007 | 03/09/2012 |
| 0247063000… | 1,000 | = | OPTUS NETWORKS PTY LIMITED | 24/04/2007 | — |
| 0247066000… | 1,000 | GOTALK LIMITED | SYMBIO NETWORKS PTY LTD | 25/10/2007 | 12/07/2013 |
| 0247087000… | 1,000 | = | PRIMUS TELECOMMUNICATIONS PTY LIMITED | 03/02/2012 | — |
| 0247094000… | 1,000 | IVOX PTY LTD | SYMBIO NETWORKS PTY LTD | 18/06/2012 | 20/06/2014 |
| 0247099000… | 1,000 | = | VIRTUTEL PTY LTD | 20/12/2015 | — |
| 0247104000… | 1,000 | = | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 14/07/2016 | — |
| 0247109000… | 1,000 | = | NETSIP PTY LTD | 14/02/2018 | — |
| 0247117000… | 1,000 | = | LMGPS LTD | 23/11/2023 | — |
| 0247119000… | 1,000 | = | THE TRUSTEE FOR READING FAMILY TRUST | 21/10/2019 | — |
| 0247132000… | 1,000 | = | WHY PAY MORE 4 LESS PTY LTD | 10/05/2018 | — |
| 0247137000… | 1,000 | = | CHECK TECHNOLOGY GROUP PTY LTD | 31/01/2022 | — |
| 0247145000… | 1,000 | = | C2A INTERNET.COM.AU PTY. LTD. | 13/07/2023 | — |
| 0247147000… | 2,000 | = | TELSTRA LIMITED | 02/03/2020 | — |
| 0247163000… | 1,000 | AAPT LIMITED | PIPE NETWORKS PTY LIMITED | 13/03/2024 | 24/03/2026 |
| 0247164000… | 1,000 | = | PIVOTEL SATELLITE PTY LIMITED | 16/04/2025 | — |
| 0247172000… | 1,000 | = | ADARGA PTY LTD | 16/09/2025 | — |
| 0247177000… | 1,000 | = | NETERA PTY LTD | 24/10/2025 | — |
| 0247182000… | 1,000 | = | SYMBIO NETWORKS PTY LTD | 19/08/2026 | — |
| 0247420000… | 1,000 | POWERTEL LIMITED | PIPE INTERNATIONAL (AUSTRALIA) PTY LTD | 25/07/2007 | 24/03/2026 |
| 0247427000… | 3,000 | = | OPTUS NETWORKS PTY LIMITED | 04/07/2016 | — |
| 0247450000… | 5,000 | = | OPTUS NETWORKS PTY LIMITED | 28/08/2020 | — |
| 0247460000… | 1,000 | = | TWILIO AUSTRALIA PTY LTD | 01/10/2026 | — |
| 0247608000… | 2,000 | = | OPTUS MOBILE PTY LIMITED | 29/10/2007 | — |
| 0247780000… | 1,000 | RSL COM AUSTRALIA PTY LIMITED | SYMBIO NETWORKS PTY LTD | 16/01/2007 | 01/10/2009 |
| 0247800000… | 3,000 | = | TELSTRA LIMITED | 30/06/1991 | — |
| 0247805000… | 4,000 | = | TELSTRA LIMITED | 30/06/1991 | — |
| 0247810000… | 10,000 | HUTCHISON TELECOMMUNICATIONS (AUSTRALIA) LIMITED | TPG TELECOM LIMITED | 24/08/1998 | 28/04/2017 |
| 0247820000… | 10,000 | = | TELSTRA LIMITED | 30/06/1991 | — |
| 0247830000… | 1,000 | GOTALK LIMITED | SYMBIO NETWORKS PTY LTD | 12/11/2004 | 12/07/2013 |
| 0247840000… | 20,000 | = | TELSTRA LIMITED | 30/06/1991 | — |
| 0247870000… | 20,000 | = | TELSTRA LIMITED | 30/06/1991 | — |
Numbering areas next to Katoomba in the register
Immediately above Katoomba's blocks in the 0247… prefix sit Lawson, Mount Wilson, Mulgoa and Penrith.
| Numbering area | First block | Blocks | Carriers |
|---|---|---|---|
| Lawson | 0247003000… | 37 | 21 |
| Mount Wilson | 0247006000… | 29 | 18 |
| Mulgoa | 0247010000… | 33 | 20 |
| Penrith | 0247013000… | 90 | 23 |
Had a call from a Katoomba number?
No clear pattern in reports on these numbers yet. If a call worried you:
- Call back on a number you trust
If a caller says they're your bank, the ATO, Services Australia, a courier or your telco, hang up and ring the organisation on the number from its website or your statement, never the number that called you. Caller ID can be faked.
- Report the call to Scamwatch
The National Anti-Scam Centre uses Scamwatch reports to warn others and to get scam numbers blocked. Note the number, the time and what the caller claimed to be. If anyone is in danger, call 000.
- Register on the Do Not Call Register
Registering landlines and mobiles is free and stops most telemarketing calls within 30 days. Charities, political parties, surveys and scammers aren't covered.
- If you lost money or shared details
Call your bank straight away on the number on your card and ask it to stop the payment. Then report it through ReportCyber, which passes cybercrime reports to the NSW Police Force. If your identity documents or passwords were shared, IDCARE's free support service can help you lock things down.
Nationally, Scamwatch recorded $72.5 million lost to scams that started with a phone call in 2025 (down from $107.2 million), with a median loss of $3,800 per report that lost money, and phone-call scam reports are 73.7% below their 2021 level. Telcos blocked 109.3 million scam calls and 45.2 million scam texts in January to March 2026. Sources: Targeting scams 2025 (National Anti-Scam Centre); ACMA quarterly report, Jan–Mar 2026.
Katoomba numbers: questions and answers
Where is the Katoomba numbering area?
Katoomba is in New South Wales, in the Blue Mountains council area. The nearest other numbering areas are Lawson (14 km), Hampton (23 km) and Mount Wilson (24 km).
What area code does Katoomba use?
Katoomba numbers use area code 02. Its register blocks start with 02 47. From overseas, drop the 0 and dial +61 2 followed by the eight-digit local number.
What time zone is Katoomba in?
Katoomba is on Australian Eastern Time (AEST, UTC+10), with daylight saving (AEDT, UTC+11) from the first Sunday in October to the first Sunday in April.
Which carriers hold Katoomba phone numbers?
The ACMA register lists 22 carriers with allocated blocks in Katoomba. By allocated numbers the largest are Telstra (53.2%), TPG Telecom (9%) and Optus Networks (8.7%). A number can since have been ported to another provider.
When were Katoomba numbers first allocated?
The oldest block on record for Katoomba was allocated on 30 June 1991 and is held by Telstra; the newest on 1 October 2026, to Twilio Australia.
How do I report a scam call from a Katoomba number?
Report it to Scamwatch. If you lost money, call your bank first, then report it through ReportCyber, which passes it to the NSW Police Force. Unwanted sales calls go to the Do Not Call Register's complaint form (1300 792 958).
Check a number from Katoomba
Scammers spoof local landline numbers to look nearby. Guides: Australian area codes, how caller ID spoofing works.