Cessnock: landline numbers and carriers
Cessnock is one of the town-level numbering areas the ACMA register uses under area code 02 (NSW & ACT). The register lists 42 number blocks for it with about 83,000 allocated numbers, held by 19 carriers. A landline that calls you from one of these blocks was issued for the Cessnock 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 Cessnock
TELSTRA LIMITED holds the largest share here with 56.6% of allocated numbers — with 18 other carriers alongside. The register names the range holder; individual numbers may operate on another network after porting.
| Carrier | Blocks | Numbers | Share |
|---|---|---|---|
| TELSTRA LIMITED | 6 | 47,000 | 56.6% |
| OPTUS NETWORKS PTY LIMITED | 6 | 6,800 | 8.2% |
| SYMBIO NETWORKS PTY LTD | 8 | 6,200 | 7.5% |
| PRIMUS TELECOMMUNICATIONS PTY LIMITED | 4 | 4,000 | 4.8% |
| SOUL PATTINSON TELECOMMUNICATIONS PTY LIMITED | 3 | 3,000 | 3.6% |
| NETSIP PTY LTD | 2 | 2,000 | 2.4% |
| OPTUS MOBILE PTY LIMITED | 1 | 2,000 | 2.4% |
| ADARGA PTY LTD | 1 | 1,000 | 1.2% |
| AGILE PTY LTD | 1 | 1,000 | 1.2% |
| C2A INTERNET.COM.AU PTY. LTD. | 1 | 1,000 | 1.2% |
| CHECK TECHNOLOGY GROUP PTY LTD | 1 | 1,000 | 1.2% |
| CHIME COMMUNICATIONS PTY LTD | 1 | 1,000 | 1.2% |
| LMGPS LTD | 1 | 1,000 | 1.2% |
| NETERA PTY LTD | 1 | 1,000 | 1.2% |
| PIPE INTERNATIONAL (AUSTRALIA) PTY LTD | 1 | 1,000 | 1.2% |
Number blocks registered for Cessnock
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 |
|---|---|---|
| 0240003000… | 1,000 | CHIME COMMUNICATIONS PTY LTD |
| 0240014000… | 1,000 | PRIMUS TELECOMMUNICATIONS PTY LIMITED |
| 0240056000… | 1,000 | PRIMUS TELECOMMUNICATIONS PTY LIMITED |
| 0240075000… | 1,000 | OPTUS NETWORKS PTY LIMITED |
| 0240094000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0240120000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0240121000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0240130000… | 1,000 | OPTUS NETWORKS PTY LIMITED |
| 0240135000… | 1,000 | PIPE INTERNATIONAL (AUSTRALIA) PTY LTD |
| 0240181000… | 1,000 | SYMBIO NETWORKS PTY LTD |
| 0240199000… | 100 | SYMBIO NETWORKS PTY LTD |
| 0240199100… | 200 | OPTUS NETWORKS PTY LIMITED |
| 0240199300… | 100 | SYMBIO NETWORKS PTY LTD |
| 0240199400… | 1,600 | OPTUS NETWORKS PTY LIMITED |
| 0240220000… | 1,000 | AGILE PTY LTD |
| 0240221000… | 1,000 | PRIMUS TELECOMMUNICATIONS PTY LIMITED |
| 0240241000… | 1,000 | OPTUS NETWORKS PTY LIMITED |
| 0240253000… | 2,000 | OPTUS MOBILE PTY LIMITED |
Excerpt: the 18 lowest of 42 allocated blocks (source: ACMA register).
Check a number from Cessnock
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.