Croydon: landline numbers and carriers

Croydon is one of the town-level numbering areas the ACMA register uses under area code 03 (VIC & TAS). The register lists 77 number blocks for it with about 664,200 allocated numbers, held by 22 carriers and spread over the 0382…, 0387…, 0392…, 0397…, 0388…, 0398… and 0399… dialling prefixes. That makes Croydon the 10th largest of 475 numbering areas under 03 by block count, with 1.93% of the area code's allocated numbers. A landline that calls you from one of these blocks was issued for the Croydon area — though the line may since have been ported, and caller ID can be spoofed.

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

77blocks in the register
22carriers with allocations
664,200allocated numbers
1991first allocation

Where Croydon is

State or territory
Victoria
Council area
Maroondah
Local time
— AEST, UTC+10; AEDT, UTC+11 in summer
Number format
03 82xx xxxx; from overseas +61 3 82xx xxxx
Nearest numbering areas
Ringwood (5 km), Eltham (14 km), Clayton (19 km), Emerald (VIC) (21 km), Dandenong (22 km)

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

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

How Croydon was numbered

The oldest block in Croydon 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 — 13 of 77 — date from 2000–2004, but allocations here span 35 years. 33 of the blocks are the standard 1,000-number size, 2 are 100-number blocks of the kind the ACMA has issued to VoIP and wholesale carriers since the mid-2000s, and 26 are 10,000 numbers or larger. 25 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, NZ 3 PTY LIMITED and POWERTEL LIMITED as original allocatees of blocks now held by other carriers.

PeriodBlocks allocated
1990–199412
1995–199910
2000–200413
2005–200913
2010–20145
2015–20199
2020–202410
2025–20295

The carriers in Croydon

TELSTRA LIMITED holds the largest share here with 61.4% of allocated numbers across 18 blocks; OPTUS NETWORKS PTY LIMITED is second with 16.1%, 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. OPTUS NETWORKS PTY LIMITED (10), SYMBIO NETWORKS PTY LTD (6) and SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED (1) hold blocks originally allocated to another carrier.

CarrierBlocksNumbersShareFirst blockLatest block
TELSTRA LIMITED18408,00061.4%30/06/199102/03/2020
OPTUS NETWORKS PTY LIMITED14107,20016.1%02/07/199219/05/2022
SYMBIO NETWORKS PTY LTD1029,0004.4%26/02/199919/08/2026
SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED522,0003.3%30/03/200017/06/2021
OPTUS MOBILE PTY LIMITED422,0003.3%30/05/200710/04/2008
TPG TELECOM LIMITED220,0003%24/08/199828/04/2000
PRIMUS TELECOMMUNICATIONS PTY LIMITED514,0002.1%28/10/200201/08/2017
CHIME COMMUNICATIONS PTY LTD110,0001.5%14/07/200414/07/2004
PIPE NETWORKS PTY LIMITED110,0001.5%14/07/199914/07/1999
PIPE INTERNATIONAL (AUSTRALIA) PTY LTD24,0000.6%06/05/200409/02/2009
TWILIO AUSTRALIA PTY LTD14,0000.6%01/10/202601/10/2026
NETSIP PTY LTD33,0000.5%14/02/201804/05/2023
VIRTUTEL PTY LTD22,0000.3%18/03/201520/12/2015
ADARGA PTY LTD11,0000.2%16/09/202516/09/2025
AGILE PTY LTD11,0000.2%31/05/200531/05/2005
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
NETERA PTY LTD11,0000.2%24/10/202524/10/2025
PIVOTEL SATELLITE PTY LIMITED11,0000.2%16/04/202516/04/2025
THE TRUSTEE FOR READING FAMILY TRUST11,0000.2%21/10/201921/10/2019
WHY PAY MORE 4 LESS PTY LTD11,0000.2%10/05/201810/05/2018

Number blocks registered for Croydon

Every registered block for this area is allocated to a carrier. All 77 blocks, ascending:

Block startNumbersOriginal allocateeCurrent holderAllocatedTransferred
0382000000…10,000=OPTUS MOBILE PTY LIMITED11/01/2008—
0382010000…10,000=OPTUS MOBILE PTY LIMITED10/04/2008—
0382020000…1,000NZ 3 PTY LIMITEDSYMBIO NETWORKS PTY LTD18/08/200816/06/2014
0382021000…2,000POWERTEL LIMITEDPIPE INTERNATIONAL (AUSTRALIA) PTY LTD09/02/200924/03/2026
0382023000…1,000VOXBONESYMBIO NETWORKS PTY LTD09/09/201021/02/2011
0382024000…1,000=PRIMUS TELECOMMUNICATIONS PTY LIMITED03/02/2012—
0382025000…1,000IVOX PTY LTDSYMBIO NETWORKS PTY LTD18/06/201216/06/2014
0382026000…1,000VOCUS PTY LTDPRIMUS TELECOMMUNICATIONS PTY LIMITED11/02/201408/07/2016
0382027000…1,000=SYMBIO NETWORKS PTY LTD24/04/2014—
0382028000…1,000VOCUS PTY LTDOPTUS NETWORKS PTY LIMITED05/09/2008—
0382029000…1,000=VIRTUTEL PTY LTD18/03/2015—
0382030000…1,000=VIRTUTEL PTY LTD20/12/2015—
0382031000…1,000=SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED14/07/2016—
0382032000…1,000=NETSIP PTY LTD14/02/2018—
0382033000…1,000=ADARGA PTY LTD16/09/2025—
0382034000…1,000=THE TRUSTEE FOR READING FAMILY TRUST21/10/2019—
0382035000…1,000TWILIO AUSTRALIA PTY LTDSYMBIO NETWORKS PTY LTD24/09/202015/10/2020
0382036000…1,000=WHY PAY MORE 4 LESS PTY LTD10/05/2018—
0382037000…1,000=NETSIP PTY LTD26/10/2021—
0382038000…3,000=SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED17/09/2019—
0382041000…2,000=TELSTRA LIMITED02/03/2020—
0382043000…1,000=CHECK TECHNOLOGY GROUP PTY LTD31/01/2022—
0382044000…1,000=NETSIP PTY LTD04/05/2023—
0382045000…1,000=C2A INTERNET.COM.AU PTY. LTD.13/07/2023—
0382046000…2,000=SYMBIO NETWORKS PTY LTD19/06/2020—
0382048000…1,000=LMGPS LTD23/11/2023—
0382049000…1,000=PIVOTEL SATELLITE PTY LIMITED16/04/2025—
0382050000…10,000=SYMBIO NETWORKS PTY LTD14/11/2019—
0382060000…1,000=NETERA PTY LTD24/10/2025—
0382061000…1,000=SYMBIO NETWORKS PTY LTD19/08/2026—
0382062000…4,000=TWILIO AUSTRALIA PTY LTD01/10/2026—
0382157000…1,000=TELSTRA LIMITED28/05/2007—
0382158000…1,000OPTUS NETWORKS PTY LIMITEDOPTUS MOBILE PTY LIMITED30/05/2007—
0382159000…1,000=OPTUS MOBILE PTY LIMITED06/09/2007—
0382605000…1,000=PRIMUS TELECOMMUNICATIONS PTY LIMITED01/08/2017—
0382880000…10,000=OPTUS NETWORKS PTY LIMITED24/08/2006—
0382890000…5,000=SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED17/06/2021—
0382895000…5,000=OPTUS NETWORKS PTY LIMITED19/05/2022—
0387040000…10,000HUTCHISON TELECOMMUNICATIONS (AUSTRALIA) LIMITEDTPG TELECOM LIMITED24/08/199828/04/2017
0387060000…10,000SINGTEL OPTUS PTY LIMITEDOPTUS NETWORKS PTY LIMITED18/09/199810/02/2003
0387090000…10,000SINGTEL OPTUS PTY LIMITEDOPTUS NETWORKS PTY LIMITED22/10/199910/02/2003
0387110000…10,000SINGTEL OPTUS PTY LIMITEDOPTUS NETWORKS PTY LIMITED10/04/200010/02/2003
0387170000…10,000HUTCHISON TELECOMMUNICATIONS (AUSTRALIA) LIMITEDTPG TELECOM LIMITED28/04/200028/04/2017
0387190000…10,000IPTEL PTY LIMITEDSOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED30/03/200001/12/2004
0387200000…10,000=TELSTRA LIMITED17/02/2000—
0387270000…10,000=TELSTRA LIMITED22/12/2000—
0387300000…10,000=OPTUS NETWORKS PTY LIMITED14/08/2002—
0387360000…10,000=PRIMUS TELECOMMUNICATIONS PTY LIMITED28/10/2002—
0387390000…10,000=TELSTRA LIMITED17/02/2000—
0387400000…2,000POWERTEL LIMITEDPIPE INTERNATIONAL (AUSTRALIA) PTY LTD06/05/200424/03/2026
0387403000…1,000=OPTUS NETWORKS PTY LIMITED20/06/2005—
0387408000…1,000ENGIN PTY LIMITEDPRIMUS TELECOMMUNICATIONS PTY LIMITED24/12/200411/08/2015
0387410000…10,000=CHIME COMMUNICATIONS PTY LTD14/07/2004—
0387500000…1,000GOTALK LIMITEDSYMBIO NETWORKS PTY LTD24/06/200526/07/2013
0387560000…10,000=TELSTRA LIMITED17/02/2000—
0387610000…10,000=TELSTRA LIMITED27/09/2002—
0387720000…1,000=AGILE PTY LTD31/05/200508/02/2011
0387770000…10,000RSL COM AUSTRALIA PTY LIMITEDSYMBIO NETWORKS PTY LTD26/02/199908/10/2009
0387824000…3,000=SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED18/12/2009—
0387990000…10,000AAPT LIMITEDPIPE NETWORKS PTY LIMITED14/07/199924/03/2026
0388035700…100SINGTEL OPTUS PTY LIMITEDOPTUS NETWORKS PTY LIMITED16/09/199910/02/2003
0392120000…1,000=TELSTRA LIMITED30/06/1991—
0392126000…5,000=TELSTRA LIMITED30/06/1991—
0392136000…4,000=TELSTRA LIMITED30/06/1991—
0392150000…1,000=TELSTRA LIMITED30/06/1991—
0392156000…4,000=TELSTRA LIMITED30/06/1991—
0392370000…10,000=TELSTRA LIMITED25/05/1994—
0392940000…10,000=TELSTRA LIMITED30/06/1991—
0397200000…110,000=TELSTRA LIMITED30/06/1991—
0397330000…10,000SINGTEL OPTUS PTY LIMITEDOPTUS NETWORKS PTY LIMITED02/07/199210/02/2003
0397350000…50,000=TELSTRA LIMITED30/06/1991—
0397510000…150,000=TELSTRA LIMITED30/06/1991—
0397770000…10,000SINGTEL OPTUS PTY LIMITEDOPTUS NETWORKS PTY LIMITED02/07/199210/02/2003
0397780000…20,000SINGTEL OPTUS PTY LIMITEDOPTUS NETWORKS PTY LIMITED22/05/199510/02/2003
0397800000…10,000SINGTEL OPTUS PTY LIMITEDOPTUS NETWORKS PTY LIMITED20/09/199610/02/2003
0398390000…10,000=TELSTRA LIMITED09/12/1996—
0399151100…100SINGTEL OPTUS PTY LIMITEDOPTUS NETWORKS PTY LIMITED16/09/199913/01/2016

Numbering areas next to Croydon in the register

Immediately above Croydon's blocks in the 0382…, 0387…, 0392…, 0397…, 0388…, 0398… and 0399… prefixes sit Melbourne, Point Cook, Werribee, Sunbury, Kalkallo and Whittlesea.

Numbering areaFirst blockBlocksCarriers
Melbourne0382560000…20612
Point Cook0382563100…53
Werribee0387000000…3113
Sunbury0387010000…2513
Kalkallo0387020000…1913
Whittlesea0387030000…2113

Had a call from a Croydon 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.

Croydon numbers: questions and answers

Where is the Croydon numbering area?

Croydon is in Victoria, in the Maroondah council area. The nearest other numbering areas are Ringwood (5 km), Eltham (14 km) and Clayton (19 km).

What area code does Croydon use?

Croydon numbers use area code 03. Its register blocks start with 03 82, 03 87, 03 92, 03 97, 03 88, 03 98 and 03 99. From overseas, drop the 0 and dial +61 3 followed by the eight-digit local number.

What time zone is Croydon in?

Croydon 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 Croydon phone numbers?

The ACMA register lists 22 carriers with allocated blocks in Croydon. By allocated numbers the largest are Telstra (61.4%), Optus Networks (16.1%) and Symbio Networks (4.4%). A number can since have been ported to another provider.

When were Croydon numbers first allocated?

The oldest block on record for Croydon 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 Croydon 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 Croydon

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