Whittlesea: landline numbers and carriers

Whittlesea is one of the town-level numbering areas the ACMA register uses under area code 03 (VIC & TAS). The register lists 49 number blocks for it with about 244,000 allocated numbers, held by 23 carriers and spread over the 0381…, 0387…, 0397… and 0392… dialling prefixes. That makes Whittlesea the 24th largest of 475 numbering areas under 03 by block count, with 0.71% of the area code's allocated numbers. A landline that calls you from one of these blocks was issued for the Whittlesea area — though the line may since have been ported, and caller ID can be spoofed.

Source: ACMA register, data as of 16/10/2026

49blocks in the register
23carriers with allocations
244,000allocated numbers
1991first allocation

Where Whittlesea is

State or territory
Victoria
Council area
Whittlesea
Local time
— AEST, UTC+10; AEDT, UTC+11 in summer
Number format
03 81xx xxxx; from overseas +61 3 81xx xxxx
Nearest numbering areas
Kalkallo (16 km), Craigieburn (21 km), Flowerdale (22 km), Kinglake (23 km), Kilmore (24 km)

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

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

How Whittlesea was numbered

The oldest block in Whittlesea 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 — 9 of 49 — date from 2005–2009, but allocations here span 35 years. 28 of the blocks are the standard 1,000-number size, and 15 are 10,000 numbers or larger. 12 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.

PeriodBlocks allocated
1990–19945
1995–19993
2000–20046
2005–20099
2010–20145
2015–20198
2020–20248
2025–20295

The carriers in Whittlesea

Whittlesea is spread across carriers: TELSTRA LIMITED leads with 35.7% of allocated numbers ahead of OPTUS NETWORKS PTY LIMITED on 14.3%, and 23 carriers hold blocks in total. TELSTRA LIMITED has the longest tenure, with a block dated 30/06/1991; TWILIO AUSTRALIA PTY LTD received the newest, on 01/10/2026. SYMBIO NETWORKS PTY LTD (5), SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED (1) and PRIMUS TELECOMMUNICATIONS PTY LIMITED (2) hold blocks originally allocated to another carrier.

CarrierBlocksNumbersShareFirst blockLatest block
TELSTRA LIMITED787,00035.7%30/06/199102/03/2020
OPTUS NETWORKS PTY LIMITED435,00014.3%30/06/200428/08/2020
SYMBIO NETWORKS PTY LTD928,00011.5%26/02/199919/08/2026
SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED314,0005.7%30/03/200014/07/2016
PRIMUS TELECOMMUNICATIONS PTY LIMITED413,0005.3%28/10/200211/02/2014
OPTUS MOBILE PTY LIMITED312,0004.9%30/05/200714/01/2008
CHIME COMMUNICATIONS PTY LTD110,0004.1%14/07/200414/07/2004
PIPE INTERNATIONAL (AUSTRALIA) PTY LTD110,0004.1%03/07/200003/07/2000
PIPE NETWORKS PTY LIMITED110,0004.1%14/07/199914/07/1999
TPG TELECOM LIMITED110,0004.1%24/08/199824/08/1998
NETSIP PTY LTD22,0000.8%14/02/201826/10/2021
VIRTUTEL PTY LTD22,0000.8%18/03/201520/12/2015
ADARGA PTY LTD11,0000.4%16/09/202516/09/2025
AGILE PTY LTD11,0000.4%31/05/200531/05/2005
C2A INTERNET.COM.AU PTY. LTD.11,0000.4%13/07/202313/07/2023
CHECK TECHNOLOGY GROUP PTY LTD11,0000.4%31/01/202231/01/2022
GENNEXT ENTERPRISES PTY LTD11,0000.4%03/10/201903/10/2019
LMGPS LTD11,0000.4%23/11/202323/11/2023
NETERA PTY LTD11,0000.4%24/10/202524/10/2025
PIVOTEL SATELLITE PTY LIMITED11,0000.4%16/04/202516/04/2025
THE TRUSTEE FOR READING FAMILY TRUST11,0000.4%21/10/201921/10/2019
TWILIO AUSTRALIA PTY LTD11,0000.4%01/10/202601/10/2026
WHY PAY MORE 4 LESS PTY LTD11,0000.4%10/05/201810/05/2018

Number blocks registered for Whittlesea

Every registered block for this area is allocated to a carrier. All 49 blocks, ascending:

Block startNumbersOriginal allocateeCurrent holderAllocatedTransferred
0381010000…10,000=OPTUS MOBILE PTY LIMITED14/01/2008—
0381030000…3,000=SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED18/12/2009—
0381035000…1,000VOXBONESYMBIO NETWORKS PTY LTD10/09/201021/02/2011
0381036000…1,000=PRIMUS TELECOMMUNICATIONS PTY LIMITED03/02/2012—
0381038000…1,000IVOX PTY LTDSYMBIO NETWORKS PTY LTD18/06/201216/06/2014
0381040000…1,000=SYMBIO NETWORKS PTY LTD24/04/2014—
0381042000…1,000VOCUS PTY LTDPRIMUS TELECOMMUNICATIONS PTY LIMITED11/02/201408/07/2016
0381044000…1,000=VIRTUTEL PTY LTD18/03/2015—
0381045000…1,000=SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED14/07/2016—
0381046000…1,000=ADARGA PTY LTD16/09/2025—
0381048000…1,000=THE TRUSTEE FOR READING FAMILY TRUST21/10/2019—
0381049000…1,000TWILIO AUSTRALIA PTY LTDSYMBIO NETWORKS PTY LTD24/09/202015/10/2020
0381051000…1,000=WHY PAY MORE 4 LESS PTY LTD10/05/2018—
0381053000…1,000=NETSIP PTY LTD26/10/2021—
0381055000…1,000=GENNEXT ENTERPRISES PTY LTD03/10/2019—
0381056000…1,000=CHECK TECHNOLOGY GROUP PTY LTD31/01/2022—
0381058000…1,000=C2A INTERNET.COM.AU PTY. LTD.13/07/2023—
0381070000…10,000=SYMBIO NETWORKS PTY LTD14/11/2019—
0381080000…1,000=LMGPS LTD23/11/2023—
0381082000…1,000=PIVOTEL SATELLITE PTY LIMITED16/04/2025—
0381086000…1,000=NETERA PTY LTD24/10/2025—
0381088000…2,000=SYMBIO NETWORKS PTY LTD19/06/2020—
0381090000…5,000=OPTUS NETWORKS PTY LIMITED28/08/2020—
0381095000…1,000=SYMBIO NETWORKS PTY LTD19/08/2026—
0381096000…1,000=TWILIO AUSTRALIA PTY LTD01/10/2026—
0381187000…1,000OPTUS NETWORKS PTY LIMITEDOPTUS MOBILE PTY LIMITED30/05/2007—
0381870000…10,000=OPTUS NETWORKS PTY LIMITED05/04/2007—
0381880000…10,000=OPTUS NETWORKS PTY LIMITED24/08/2006—
0387030000…10,000HUTCHISON TELECOMMUNICATIONS (AUSTRALIA) LIMITEDTPG TELECOM LIMITED24/08/199828/04/2017
0387150000…10,000IPTEL PTY LIMITEDSOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED30/03/200001/12/2004
0387240000…10,000POWERTEL LIMITEDPIPE INTERNATIONAL (AUSTRALIA) PTY LTD03/07/200024/03/2026
0387350000…10,000=PRIMUS TELECOMMUNICATIONS PTY LIMITED28/10/2002—
0387407000…1,000ENGIN PTY LIMITEDPRIMUS TELECOMMUNICATIONS PTY LIMITED24/12/200411/08/2015
0387480000…10,000=CHIME COMMUNICATIONS PTY LTD14/07/2004—
0387504000…1,000GOTALK LIMITEDSYMBIO NETWORKS PTY LTD24/06/200526/07/2013
0387525000…1,000=TELSTRA LIMITED28/05/2007—
0387605000…1,000=VIRTUTEL PTY LTD20/12/2015—
0387644000…1,000=NETSIP PTY LTD14/02/2018—
0387670000…10,000RSL COM AUSTRALIA PTY LIMITEDSYMBIO NETWORKS PTY LTD26/02/199908/10/2009
0387719000…1,000=AGILE PTY LTD31/05/200508/02/2011
0387723000…1,000=OPTUS MOBILE PTY LIMITED05/09/2007—
0387750000…10,000AAPT LIMITEDPIPE NETWORKS PTY LIMITED14/07/199924/03/2026
0387760000…10,000=OPTUS NETWORKS PTY LIMITED30/06/2004—
0387848000…2,000=TELSTRA LIMITED02/03/2020—
0392161000…2,000=TELSTRA LIMITED30/06/1991—
0392180000…2,000=TELSTRA LIMITED30/06/1991—
0397100000…10,000=TELSTRA LIMITED30/06/1991—
0397120000…10,000=TELSTRA LIMITED30/06/1991—
0397140000…60,000=TELSTRA LIMITED30/06/1991—

Numbering areas next to Whittlesea in the register

Immediately below and above Whittlesea's blocks in the 0381…, 0387…, 0397… and 0392… prefixes sit Kalkallo, Melbourne, Werribee, Sunbury, Croydon, Dandenong and Point Cook.

Numbering areaFirst blockBlocksCarriers
Kalkallo0381000000…4321
Melbourne0381020000…724
Werribee0387000000…3013
Sunbury0387010000…2413
Croydon0387040000…3610
Dandenong0387050000…8515
Point Cook0387443500…32

Had a call from a Whittlesea 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 Victoria Police. 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.

Whittlesea numbers: questions and answers

Where is the Whittlesea numbering area?

Whittlesea is in Victoria, in the Whittlesea council area. The nearest other numbering areas are Kalkallo (16 km), Craigieburn (21 km) and Flowerdale (22 km).

What area code does Whittlesea use?

Whittlesea numbers use area code 03. Its register blocks start with 03 81, 03 87, 03 97 and 03 92. From overseas, drop the 0 and dial +61 3 followed by the eight-digit local number.

What time zone is Whittlesea in?

Whittlesea 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 Whittlesea phone numbers?

The ACMA register lists 23 carriers with allocated blocks in Whittlesea. By allocated numbers the largest are Telstra (35.7%), Optus Networks (14.3%) and Symbio Networks (11.5%). A number can since have been ported to another provider.

When were Whittlesea numbers first allocated?

The oldest block on record for Whittlesea 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 Whittlesea number?

Report it to Scamwatch. If you lost money, call your bank first, then report it through ReportCyber, which passes it to Victoria Police. Unwanted sales calls go to the Do Not Call Register's complaint form (1300 792 958).

Check a number from Whittlesea

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