List of the top 20 organizations with the largest IP allocations in Macao
| Rank | Name | IPv4 addresses | IPv6 /64 networks | AS numbers | Prefixes |
|---|---|---|---|---|---|
| Companhia de Telecomunicacoes de Macau | 757,248 | 232 | 1 | 79 | |
| University of Macau | 131,072 | 0 | 1 | 3 | |
| MTel telecommunication company ltd. | 43,520 | 229 | 1 | 59 | |
| 4 | Net Solutions - Consultoria Em Tecnologias De Informacao, Sociedade Unipessoal | 9,472 | 233 | 1 | 39 |
| 5 | Centro de Informacoes Tecnologia de Macau | 4,096 | 0 | 1 | 10 |
| 6 | CHINA TELECOM(MACAU) COMPANY LIMITED | 3,584 | 225 | 1 | 44 |
| 7 | MACAU COMMUNICATION NETWORKS COMPANY LIMITED | 3,584 | 232 | 1 | 8 |
| 8 | SmarTone Mobile Communications (Macau) Limited | 1,536 | 232 | 1 | 5 |
| 9 | Caldawin Software Technology Company Limited | 768 | 232 | 1 | 3 |
| 10 | Cat Networks K.K. | 0 | 216 | 1 | 1 |
| 11 | Wind Cloud Network Technology Co Ltd | 0 | 1.5 x 221 | 1 | 3 |