| 203.0.0.0/8 | WHOIS (APNIC) | Asia Pacific Network Information Center, Pty. Ltd. | AU |
| 203.162.0.0/16 | BGP route | AS45899 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.0.0/16 | WHOIS (APNIC) | Vietnam Posts and Telecommunications Group | VN |
| 203.162.160.0/19 | APNIC assigned | — | VN |
| 203.162.160.0/20 | WHOIS (APNIC) | VietNam Data Communication Company | VN |
| 203.162.176.0/20 | WHOIS (APNIC) | VietNam Data Communication Company | VN |
| 203.162.168.0/21 | BGP route | AS45899 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.176.0/21 | BGP route | AS45899 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.184.0/21 | BGP route | AS45899 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.160.0/23 | BGP route | AS45899 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.162.0/23 | BGP route | AS7643 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.164.0/23 | BGP route | AS45899 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.166.0/23 | BGP route | AS45899 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.168.0/23 | BGP route | AS45899 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.170.0/23 | BGP route | AS45899 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.172.0/23 | BGP route | AS45899 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.174.0/23 | BGP route | AS45899 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.176.0/23 | BGP route | AS45899 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.178.0/23 | BGP route | AS45899 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.184.0/23 | BGP route | AS45899 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.162.0/24 | BGP route | AS45899 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.162.0/24 | WHOIS (APNIC) | dialupbinhthuan-net | VN |
| 203.162.163.0/24 | BGP route | AS7643 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.166.0/24 | BGP route | AS135905 VIETNAM POSTS AND TELECOMMUNICATIONS GROUP | — |
| 203.162.168.0/24 | WHOIS (APNIC) | VietNamNet-No 4 Lang Ha, Ha Noi | VN |
| 203.162.171.0/24 | BGP route | AS45899 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.186.0/24 | WHOIS (APNIC) | dialupkiengiang-net | VN |
| 203.162.187.0/24 | WHOIS (APNIC) | dialupcantho-net | VN |
| 203.162.188.0/24 | WHOIS (APNIC) | dialuplongan-net | VN |
| 203.162.189.0/24 | WHOIS (APNIC) | dialupvungtau-net | VN |
| 203.162.190.0/24 | WHOIS (APNIC) | dialupbinhduong-net | VN |
| 203.162.160.32/27 | WHOIS (APNIC) | Ericsson Representative Office in Ha Noi | VN |
| 203.162.160.64/27 | WHOIS (APNIC) | Ericsson Representative Office in Ha Noi | VN |
| 203.162.160.128/27 | WHOIS (APNIC) | SEDCO FOREX INTERNATIONAL INC | VN |
| 203.162.160.160/27 | WHOIS (APNIC) | The People's Council and People's Committee of Long An | VN |
| 203.162.160.192/27 | WHOIS (APNIC) | Paragon Solutions VietNam (PSV) | VN |
| 203.162.174.0/28 | WHOIS (APNIC) | IT Center of Lao Cai Province | VN |
| 203.162.174.32/28 | WHOIS (APNIC) | Siemens AG Representation Vietnam | VN |
| 203.162.174.48/28 | WHOIS (APNIC) | General Department of Tax | VN |
| 203.162.174.80/28 | WHOIS (APNIC) | Cty TNHH den hinh Orion Hanel | VN |
| 203.162.174.96/28 | WHOIS (APNIC) | KYUNGVIET-NET | VN |
| 203.162.174.112/28 | WHOIS (APNIC) | Univesity Of Communications And Transport | VN |
| 203.162.174.128/28 | WHOIS (APNIC) | North Area Representative Office of Vietnam Airlines | VN |
| 203.162.174.144/28 | WHOIS (APNIC) | Vietnam Agricultural Development Bank | VN |
| 203.162.174.192/28 | WHOIS (APNIC) | MSA-HAPRO Hanoi Co Ltd | VN |
| 203.162.174.208/28 | WHOIS (APNIC) | TRUONGCBVHTT-NET | VN |