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 76 number blocks for it with about 660,200 allocated numbers, held by 21 carriers. 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 31/08/2026
The carriers in Croydon
TELSTRA LIMITED holds the largest share here with 61.8% of allocated numbers — with 20 other carriers alongside. The register names the range holder; individual numbers may operate on another network after porting.
| Carrier | Blocks | Numbers | Share |
|---|---|---|---|
| TELSTRA LIMITED | 18 | 408,000 | 61.8% |
| OPTUS NETWORKS PTY LIMITED | 14 | 107,200 | 16.2% |
| SYMBIO NETWORKS PTY LTD | 10 | 29,000 | 4.4% |
| OPTUS MOBILE PTY LIMITED | 4 | 22,000 | 3.3% |
| SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 5 | 22,000 | 3.3% |
| TPG TELECOM LIMITED | 2 | 20,000 | 3% |
| PRIMUS TELECOMMUNICATIONS PTY LIMITED | 5 | 14,000 | 2.1% |
| CHIME COMMUNICATIONS PTY LTD | 1 | 10,000 | 1.5% |
| PIPE NETWORKS PTY LIMITED | 1 | 10,000 | 1.5% |
| PIPE INTERNATIONAL (AUSTRALIA) PTY LTD | 2 | 4,000 | 0.6% |
| NETSIP PTY LTD | 3 | 3,000 | 0.5% |
| VIRTUTEL PTY LTD | 2 | 2,000 | 0.3% |
| ADARGA PTY LTD | 1 | 1,000 | 0.2% |
| AGILE PTY LTD | 1 | 1,000 | 0.2% |
| C2A INTERNET.COM.AU PTY. LTD. | 1 | 1,000 | 0.2% |
Number blocks registered for Croydon
The ACMA allocates geographic numbers in blocks tied to this numbering area. Every registered block for this area is allocated to a carrier.
| Block start | Numbers | Held by |
|---|---|---|
| 0382000000… | 10,000 | OPTUS MOBILE PTY LIMITED |
| 0382010000… | 10,000 | OPTUS MOBILE PTY LIMITED |
| 0382020000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0382021000… | 2,000 | PIPE INTERNATIONAL (AUSTRALIA) PTY LTD |
| 0382023000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0382024000… | 1,000 | PRIMUS TELECOMMUNICATIONS PTY LIMITED |
| 0382025000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0382026000… | 1,000 | PRIMUS TELECOMMUNICATIONS PTY LIMITED |
| 0382027000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0382028000… | 1,000 | OPTUS NETWORKS PTY LIMITED |
| 0382029000… | 1,000 | VIRTUTEL PTY LTD |
| 0382030000… | 1,000 | VIRTUTEL PTY LTD |
| 0382031000… | 1,000 | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED |
| 0382032000… | 1,000 | NETSIP PTY LTD |
| 0382033000… | 1,000 | ADARGA PTY LTD |
| 0382034000… | 1,000 | THE TRUSTEE FOR READING FAMILY TRUST |
| 0382035000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0382036000… | 1,000 | WHY PAY MORE 4 LESS PTY LTD |
Excerpt: the 18 lowest of 76 allocated blocks (source: ACMA register).
Check a number from Croydon
Worth knowing
- Block data tells you where a line was issued, not who is calling — and scammers routinely spoof local landline numbers to make a call look nearby.
- Learn more: the Australian area codes guide and how caller ID spoofing works.