Kalkallo: landline numbers and carriers
Kalkallo is one of the town-level numbering areas the ACMA register uses under area code 03 (VIC & TAS). The register lists 43 number blocks for it with about 163,000 allocated numbers, held by 21 carriers. A landline that calls you from one of these blocks was issued for the Kalkallo 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 Kalkallo
Kalkallo is spread across carriers: OPTUS NETWORKS PTY LIMITED leads with 17.8% of allocated numbers, and 21 carriers hold blocks in total. The register names the range holder; individual numbers may operate on another network after porting.
| Carrier | Blocks | Numbers | Share |
|---|---|---|---|
| OPTUS NETWORKS PTY LIMITED | 3 | 29,000 | 17.8% |
| SYMBIO NETWORKS PTY LTD | 9 | 28,000 | 17.2% |
| SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 3 | 14,000 | 8.6% |
| TELSTRA LIMITED | 4 | 14,000 | 8.6% |
| PRIMUS TELECOMMUNICATIONS PTY LIMITED | 4 | 13,000 | 8% |
| OPTUS MOBILE PTY LIMITED | 3 | 12,000 | 7.4% |
| CHIME COMMUNICATIONS PTY LTD | 1 | 10,000 | 6.1% |
| PIPE INTERNATIONAL (AUSTRALIA) PTY LTD | 1 | 10,000 | 6.1% |
| PIPE NETWORKS PTY LIMITED | 1 | 10,000 | 6.1% |
| TPG TELECOM LIMITED | 1 | 10,000 | 6.1% |
| NETSIP PTY LTD | 2 | 2,000 | 1.2% |
| VIRTUTEL PTY LTD | 2 | 2,000 | 1.2% |
| ADARGA PTY LTD | 1 | 1,000 | 0.6% |
| AGILE PTY LTD | 1 | 1,000 | 0.6% |
| C2A INTERNET.COM.AU PTY. LTD. | 1 | 1,000 | 0.6% |
Number blocks registered for Kalkallo
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 |
|---|---|---|
| 0381000000… | 10,000 | OPTUS MOBILE PTY LIMITED |
| 0381033000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0381034000… | 1,000 | PRIMUS TELECOMMUNICATIONS PTY LIMITED |
| 0381037000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0381039000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0381041000… | 1,000 | PRIMUS TELECOMMUNICATIONS PTY LIMITED |
| 0381043000… | 1,000 | VIRTUTEL PTY LTD |
| 0381047000… | 1,000 | THE TRUSTEE FOR READING FAMILY TRUST |
| 0381050000… | 1,000 | WHY PAY MORE 4 LESS PTY LTD |
| 0381052000… | 1,000 | NETSIP PTY LTD |
| 0381054000… | 1,000 | CHECK TECHNOLOGY GROUP PTY LTD |
| 0381057000… | 1,000 | C2A INTERNET.COM.AU PTY. LTD. |
| 0381059000… | 1,000 | LMGPS LTD |
| 0381060000… | 10,000 | SYMBIO NETWORKS PTY LTD |
| 0381081000… | 1,000 | PIVOTEL SATELLITE PTY LIMITED |
| 0381083000… | 2,000 | SYMBIO NETWORKS PTY LTD |
| 0381085000… | 1,000 | NETERA PTY LTD |
| 0381087000… | 1,000 | SYMBIO NETWORKS PTY LTD |
Excerpt: the 18 lowest of 43 allocated blocks (source: ACMA register).
Check a number from Kalkallo
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.