Gosford: landline numbers and carriers

Gosford is one of the town-level numbering areas the ACMA register uses under area code 02 (NSW & ACT). The register lists 113 number blocks for it with about 640,000 allocated numbers, held by 20 carriers, all under the 0243… dialling prefix. That makes Gosford the 6th largest of 576 numbering areas under 02 by block count, with 1.51% of the area code's allocated numbers. A landline that calls you from one of these blocks was issued for the Gosford area — though the line may since have been ported, and caller ID can be spoofed.

Source: ACMA register, data as of 14/10/2026

113blocks in the register
20carriers with allocations
640,000allocated numbers
1991first allocation

Where Gosford is

State or territory
New South Wales
Council area
Central Coast
Local time
— AEST, UTC+10; AEDT, UTC+11 in summer
Number format
02 43xx xxxx; from overseas +61 2 43xx xxxx
Nearest numbering areas
Wyong (18 km), Mangrove Mountain (19 km), Avalon Beach (23 km), Terrey Hills (32 km), Wisemans Ferry (33 km)

Locality, council and state: ABS ASGS Edition 3 (CC BY 4.0). Distances are straight-line between localities.

Map of the Gosford numbering area in New South Wales and the nearest other numbering areas
Shaded: Central Coast council area. The ACMA doesn't publish numbering-area boundaries, so the dot marks the Gosford locality rather than an exact outline; the inset shows where the map sits in Australia. Boundaries: ABS (CC BY 4.0).

How Gosford was numbered

The oldest block in Gosford was allocated on 30 June 1991 and is held today by TELSTRA LIMITED; the newest on 19 August 2026 to SYMBIO NETWORKS PTY LTD. Most of the area's blocks — 24 of 113 — date from 2005–2009, but allocations here span 35 years. 42 of the blocks are the standard 1,000-number size, 10 are 100-number blocks of the kind the ACMA has issued to VoIP and wholesale carriers since the mid-2000s, and 32 are 10,000 numbers or larger. 29 allocated blocks have changed hands since they were first issued: the register still names AAPT LIMITED, EISA LIMITED, ENGIN PTY LIMITED, GOTALK LIMITED, HUTCHISON TELECOMMUNICATIONS (AUSTRALIA) LIMITED, IPTEL PTY LIMITED, IVOX PTY LTD and POWERTEL LIMITED as original allocatees of blocks now held by other carriers.

PeriodBlocks allocated
1990–199418
1995–19999
2000–200418
2005–200924
2010–20149
2015–201917
2020–202413
2025–20295

The carriers in Gosford

TELSTRA LIMITED holds the largest share here with 60.9% of allocated numbers across 23 blocks; OPTUS NETWORKS PTY LIMITED is second with 9.5%, and 18 other carriers hold the rest. TELSTRA LIMITED has the longest tenure, with a block dated 30/06/1991; SYMBIO NETWORKS PTY LTD received the newest, on 19/08/2026. OPTUS NETWORKS PTY LIMITED (1), PIPE NETWORKS PTY LIMITED (5) and SYMBIO NETWORKS PTY LTD (17) hold blocks originally allocated to another carrier.

CarrierBlocksNumbersShareFirst blockLatest block
TELSTRA LIMITED23390,00060.9%30/06/199109/02/1999
OPTUS NETWORKS PTY LIMITED2160,8009.5%30/06/200328/08/2020
PIPE NETWORKS PTY LIMITED541,0006.4%14/07/199902/11/2023
SYMBIO NETWORKS PTY LTD2539,2006.1%26/02/199919/08/2026
PRIMUS TELECOMMUNICATIONS PTY LIMITED826,0004.1%28/10/200215/03/2017
OPTUS MOBILE PTY LIMITED422,0003.4%30/05/200710/04/2008
SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED519,0003%29/04/199917/06/2021
PIPE INTERNATIONAL (AUSTRALIA) PTY LTD110,0001.6%17/03/200017/03/2000
TPG TELECOM LIMITED110,0001.6%24/08/199824/08/1998
CHIME COMMUNICATIONS PTY LTD66,0000.9%14/07/200430/10/2018
NETSIP PTY LTD35,0000.8%14/02/201804/05/2023
AGILE PTY LTD22,0000.3%03/04/200716/03/2011
NETERA PTY LTD22,0000.3%24/10/202524/10/2025
ADARGA PTY LTD11,0000.2%16/09/202516/09/2025
C2A INTERNET.COM.AU PTY. LTD.11,0000.2%13/07/202313/07/2023
CHECK TECHNOLOGY GROUP PTY LTD11,0000.2%31/01/202231/01/2022
LMGPS LTD11,0000.2%23/11/202323/11/2023
PIVOTEL SATELLITE PTY LIMITED11,0000.2%16/04/202516/04/2025
THE TRUSTEE FOR READING FAMILY TRUST11,0000.2%21/10/201921/10/2019
VIRTUTEL PTY LTD11,0000.2%20/12/201520/12/2015

Number blocks registered for Gosford

Every registered block for this area is allocated to a carrier. All 113 blocks, ascending:

Block startNumbersOriginal allocateeCurrent holderAllocatedTransferred
0243000000…10,000EISA LIMITEDSOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED29/04/199901/12/2004
0243010000…10,000AAPT LIMITEDPIPE NETWORKS PTY LIMITED14/07/199924/03/2026
0243020000…10,000POWERTEL LIMITEDPIPE INTERNATIONAL (AUSTRALIA) PTY LTD17/03/200024/03/2026
0243030000…3,000IPTEL PTY LIMITEDSOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED30/03/200001/12/2004
0243039000…1,000AAPT LIMITEDPIPE NETWORKS PTY LIMITED30/11/200024/03/2026
0243040000…3,600=OPTUS NETWORKS PTY LIMITED30/06/2003—
0243043600…100OPTUS NETWORKS PTY LIMITEDSYMBIO NETWORKS PTY LTD30/06/200321/06/2011
0243043700…100=OPTUS NETWORKS PTY LIMITED30/06/2003—
0243043800…200OPTUS NETWORKS PTY LIMITEDSYMBIO NETWORKS PTY LTD30/06/200321/06/2011
0243044000…1,700=OPTUS NETWORKS PTY LIMITED30/06/2003—
0243045700…100OPTUS NETWORKS PTY LIMITEDSYMBIO NETWORKS PTY LTD30/06/200321/06/2011
0243045800…100=OPTUS NETWORKS PTY LIMITED30/06/2003—
0243045900…100OPTUS NETWORKS PTY LIMITEDSYMBIO NETWORKS PTY LTD30/06/200321/06/2011
0243046000…2,100=OPTUS NETWORKS PTY LIMITED30/06/2003—
0243048100…100OPTUS NETWORKS PTY LIMITEDSYMBIO NETWORKS PTY LTD30/06/200321/06/2011
0243048200…1,800=OPTUS NETWORKS PTY LIMITED30/06/2003—
0243060000…1,000=CHIME COMMUNICATIONS PTY LTD14/07/2004—
0243063000…1,000GOTALK LIMITEDSYMBIO NETWORKS PTY LTD12/11/200411/07/2013
0243064000…1,000ENGIN PTY LIMITEDPRIMUS TELECOMMUNICATIONS PTY LIMITED24/12/200411/08/2015
0243067000…1,000TWILIO AUSTRALIA PTY LTDSYMBIO NETWORKS PTY LTD24/09/202015/10/2020
0243078000…1,000GOTALK LIMITEDSYMBIO NETWORKS PTY LTD08/06/200611/07/2013
0243079000…1,000=AGILE PTY LTD03/04/200703/09/2012
0243082000…1,000OPTUS NETWORKS PTY LIMITEDOPTUS MOBILE PTY LIMITED30/05/2007—
0243086000…1,000GOTALK LIMITEDSYMBIO NETWORKS PTY LTD17/08/200911/07/2013
0243087000…3,000=SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED18/12/2009—
0243090000…10,000=OPTUS MOBILE PTY LIMITED10/04/2008—
0243112000…1,000=PRIMUS TELECOMMUNICATIONS PTY LIMITED28/10/2002—
0243113000…1,000=PRIMUS TELECOMMUNICATIONS PTY LIMITED10/01/2008—
0243114000…1,000=AGILE PTY LTD16/03/2011—
0243115000…1,000VOXBONESYMBIO NETWORKS PTY LTD02/09/201021/10/2011
0243116000…1,000=CHIME COMMUNICATIONS PTY LTD14/09/2011—
0243117000…1,000=PRIMUS TELECOMMUNICATIONS PTY LIMITED03/02/2012—
0243119000…1,000=PRIMUS TELECOMMUNICATIONS PTY LIMITED24/03/2015—
0243120000…1,000=VIRTUTEL PTY LTD20/12/2015—
0243125000…1,000=SYMBIO NETWORKS PTY LTD06/09/2012—
0243126000…1,000=PRIMUS TELECOMMUNICATIONS PTY LIMITED18/12/2012—
0243127000…2,000=SYMBIO NETWORKS PTY LTD10/04/2015—
0243131000…5,000=SYMBIO NETWORKS PTY LTD28/04/2016—
0243136000…1,000=SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED14/07/2016—
0243139000…5,000=PRIMUS TELECOMMUNICATIONS PTY LIMITED26/07/2016—
0243144000…1,000=CHIME COMMUNICATIONS PTY LTD19/09/2016—
0243146000…1,000=NETSIP PTY LTD14/02/2018—
0243149000…5,000=SYMBIO NETWORKS PTY LTD10/11/2016—
0243157000…1,000=THE TRUSTEE FOR READING FAMILY TRUST21/10/2019—
0243160000…1,000=LMGPS LTD23/11/2023—
0243163000…1,000=NETSIP PTY LTD26/10/2021—
0243166000…1,000=CHECK TECHNOLOGY GROUP PTY LTD31/01/2022—
0243170000…1,000=C2A INTERNET.COM.AU PTY. LTD.13/07/2023—
0243173000…3,000=NETSIP PTY LTD04/05/2023—
0243177000…1,000=PIVOTEL SATELLITE PTY LIMITED16/04/2025—
0243180000…10,000=SYMBIO NETWORKS PTY LTD14/11/2019—
0243190000…2,000=SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED17/06/2021—
0243192000…1,000=ADARGA PTY LTD16/09/2025—
0243194000…1,000=SYMBIO NETWORKS PTY LTD19/06/2020—
0243197000…1,000=NETERA PTY LTD24/10/2025—
0243200000…10,000=TELSTRA LIMITED30/06/1991—
0243210000…10,000=TELSTRA LIMITED09/02/1999—
0243220000…10,000=TELSTRA LIMITED10/05/1996—
0243230000…30,000=TELSTRA LIMITED30/06/1991—
0243260000…1,000RSL COM AUSTRALIA PTY LIMITEDSYMBIO NETWORKS PTY LTD26/02/199930/09/2009
0243261000…1,000=OPTUS NETWORKS PTY LIMITED20/06/2005—
0243265000…15,000=PRIMUS TELECOMMUNICATIONS PTY LIMITED15/03/2017—
0243280000…20,000=TELSTRA LIMITED30/06/1991—
0243310000…200OPTUS NETWORKS PTY LIMITEDSYMBIO NETWORKS PTY LTD18/09/200721/06/2011
0243310200…500=OPTUS NETWORKS PTY LIMITED18/09/2007—
0243310700…100OPTUS NETWORKS PTY LIMITEDSYMBIO NETWORKS PTY LTD18/09/200721/06/2011
0243310800…500=OPTUS NETWORKS PTY LIMITED18/09/2007—
0243311300…100OPTUS NETWORKS PTY LIMITEDSYMBIO NETWORKS PTY LTD18/09/200721/06/2011
0243311400…1,100=OPTUS NETWORKS PTY LIMITED18/09/2007—
0243312500…100OPTUS NETWORKS PTY LIMITEDSYMBIO NETWORKS PTY LTD18/09/200721/06/2011
0243312600…4,100=OPTUS NETWORKS PTY LIMITED18/09/2007—
0243316700…100OPTUS NETWORKS PTY LIMITEDSYMBIO NETWORKS PTY LTD18/09/200717/06/2011
0243316800…3,200=OPTUS NETWORKS PTY LIMITED18/09/2007—
0243320000…30,000=TELSTRA LIMITED30/06/1991—
0243352000…1,000=OPTUS MOBILE PTY LIMITED06/09/2007—
0243353000…1,000=OPTUS NETWORKS PTY LIMITED26/11/2007—
0243354000…3,000=OPTUS NETWORKS PTY LIMITED11/08/2015—
0243357000…3,000=OPTUS NETWORKS PTY LIMITED31/10/2014—
0243360000…10,000=TELSTRA LIMITED19/08/1996—
0243370000…10,000=TELSTRA LIMITED21/07/1997—
0243383000…5,000=SYMBIO NETWORKS PTY LTD25/09/2023—
0243390000…10,000=OPTUS NETWORKS PTY LIMITED11/04/2007—
0243400000…50,000=TELSTRA LIMITED30/06/1991—
0243450000…10,000=TELSTRA LIMITED19/08/1996—
0243461000…1,000=OPTUS NETWORKS PTY LIMITED10/06/2011—
0243462000…1,000=CHIME COMMUNICATIONS PTY LTD21/02/2017—
0243464000…2,000VOCUS PTY LTDOPTUS NETWORKS PTY LIMITED28/04/200808/09/2008
0243466000…1,000=CHIME COMMUNICATIONS PTY LTD30/10/2018—
0243467000…1,000=SYMBIO NETWORKS PTY LTD19/08/2026—
0243474000…1,000=OPTUS NETWORKS PTY LIMITED15/06/2017—
0243480000…10,000=TELSTRA LIMITED30/06/1991—
0243490000…10,000=TELSTRA LIMITED03/11/1994—
0243600000…10,000=TELSTRA LIMITED30/06/1991—
0243610000…10,000HUTCHISON TELECOMMUNICATIONS (AUSTRALIA) LIMITEDTPG TELECOM LIMITED24/08/199828/04/2017
0243620000…20,000=TELSTRA LIMITED30/06/1991—
0243640000…10,000=OPTUS MOBILE PTY LIMITED11/01/2008—
0243650000…10,000=TELSTRA LIMITED30/06/1991—
0243670000…40,000=TELSTRA LIMITED30/06/1991—
0243720000…10,000=TELSTRA LIMITED30/06/1991—
0243750000…10,000=TELSTRA LIMITED30/06/1991—
0243770000…10,000=TELSTRA LIMITED30/06/1991—
0243780000…10,000=OPTUS NETWORKS PTY LIMITED17/02/2016—
0243790000…10,000=TELSTRA LIMITED30/06/1991—
0243800000…1,000=CHIME COMMUNICATIONS PTY LTD09/07/2008—
0243801000…1,000=NETERA PTY LTD24/10/2025—
0243808000…2,000IVOX PTY LTDSYMBIO NETWORKS PTY LTD18/06/201220/06/2014
0243810000…20,000=TELSTRA LIMITED30/06/1991—
0243840000…20,000=TELSTRA LIMITED30/06/1991—
0243860000…10,000=OPTUS NETWORKS PTY LIMITED28/08/2020—
0243870000…10,000AAPT LIMITEDPIPE NETWORKS PTY LIMITED29/05/202324/03/2026
0243880000…20,000=TELSTRA LIMITED30/06/1991—
0243950000…10,000AAPT LIMITEDPIPE NETWORKS PTY LIMITED15/08/202324/03/2026
0243980000…10,000AAPT LIMITEDPIPE NETWORKS PTY LIMITED02/11/202324/03/2026

Numbering areas next to Gosford in the register

Immediately above Gosford's blocks in the 0243… prefix sit Mangrove Mountain and Wyong.

Numbering areaFirst blockBlocksCarriers
Mangrove Mountain0243033000…2919
Wyong0243036000…6221

Had a call from a Gosford number?

No clear pattern in reports on these numbers yet. If a call worried you:

  1. 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.

  2. 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.

    Report to Scamwatch ↗

  3. 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.

    Do Not Call Register ↗

  4. 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.

    ReportCyber ↗IDCARE ↗

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.

Gosford numbers: questions and answers

Where is the Gosford numbering area?

Gosford is in New South Wales, in the Central Coast council area. The nearest other numbering areas are Wyong (18 km), Mangrove Mountain (19 km) and Avalon Beach (23 km).

What area code does Gosford use?

Gosford numbers use area code 02. Its register blocks start with 02 43. From overseas, drop the 0 and dial +61 2 followed by the eight-digit local number.

What time zone is Gosford in?

Gosford 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 Gosford phone numbers?

The ACMA register lists 20 carriers with allocated blocks in Gosford. By allocated numbers the largest are Telstra (60.9%), Optus Networks (9.5%) and Pipe Networks (6.4%). A number can since have been ported to another provider.

When were Gosford numbers first allocated?

The oldest block on record for Gosford was allocated on 30 June 1991 and is held by Telstra; the newest on 19 August 2026, to Symbio Networks.

How do I report a scam call from a Gosford 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 Gosford

Scammers spoof local landline numbers to look nearby. Guides: Australian area codes, how caller ID spoofing works.