Adelaide: landline numbers and carriers
Adelaide is one of the town-level numbering areas the ACMA register uses under area code 08 (SA, WA & NT). The register lists 276 number blocks for it with about 3.7m allocated numbers, held by 24 carriers. A landline that calls you from one of these blocks was issued for the Adelaide 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 Adelaide
TELSTRA LIMITED holds the largest share here with 55% of allocated numbers — with 23 other carriers alongside. The register names the range holder; individual numbers may operate on another network after porting.
| Carrier | Blocks | Numbers | Share |
|---|---|---|---|
| TELSTRA LIMITED | 92 | 2m | 55% |
| OPTUS NETWORKS PTY LIMITED | 43 | 565,000 | 15.5% |
| SYMBIO NETWORKS PTY LTD | 35 | 263,000 | 7.2% |
| PRIMUS TELECOMMUNICATIONS PTY LIMITED | 15 | 215,000 | 5.9% |
| PIPE NETWORKS PTY LIMITED | 29 | 203,000 | 5.6% |
| SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 10 | 127,000 | 3.5% |
| NETSIP PTY LTD | 13 | 77,000 | 2.1% |
| AGILE PTY LTD | 8 | 56,000 | 1.5% |
| OPTUS MOBILE PTY LIMITED | 4 | 40,000 | 1.1% |
| CHIME COMMUNICATIONS PTY LTD | 4 | 35,000 | 1% |
| VERIZON AUSTRALIA PTY LIMITED | 4 | 25,000 | 0.7% |
| TPG TELECOM LIMITED | 4 | 14,000 | 0.4% |
| VIRTUTEL PTY LTD | 2 | 11,000 | 0.3% |
| NETERA PTY LTD | 3 | 3,000 | 0.1% |
| TWILIO AUSTRALIA PTY LTD | 1 | 2,000 | 0.1% |
Number blocks registered for Adelaide
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 |
|---|---|---|
| 0870000000… | 10,000 | OPTUS MOBILE PTY LIMITED |
| 0870010000… | 10,000 | OPTUS MOBILE PTY LIMITED |
| 0870020000… | 20,000 | OPTUS NETWORKS PTY LIMITED |
| 0870040000… | 10,000 | OPTUS NETWORKS PTY LIMITED |
| 0870050000… | 10,000 | OPTUS MOBILE PTY LIMITED |
| 0870060000… | 10,000 | OPTUS MOBILE PTY LIMITED |
| 0870070000… | 10,000 | OPTUS NETWORKS PTY LIMITED |
| 0870080000… | 1,000 | VIRTUTEL PTY LTD |
| 0870081000… | 1,000 | TELPACIFIC PTY LIMITED |
| 0870082000… | 1,000 | SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED |
| 0870083000… | 1,000 | NETSIP PTY LTD |
| 0870084000… | 1,000 | TELSTRA LIMITED |
| 0870085000… | 1,000 | THE TRUSTEE FOR READING FAMILY TRUST |
| 0870086000… | 1,000 | ADARGA PTY LTD |
| 0870087000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0870088000… | 1,000 | WHY PAY MORE 4 LESS PTY LTD |
| 0870089000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0870090000… | 10,000 | SYMBIO NETWORKS PTY LTD |
Excerpt: the 18 lowest of 276 allocated blocks (source: ACMA register).
Check a number from Adelaide
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.