| 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 |
| 203.162.32.0/19 | APNIC assigned | — | VN |
| 203.162.32.0/20 | WHOIS (APNIC) | VietNam Data Communication Company | VN |
| 203.162.40.0/21 | BGP route | AS45899 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.48.0/22 | WHOIS (APNIC) | VietNam Data Communication Company | VN |
| 203.162.60.0/22 | BGP route | AS45899 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.60.0/22 | WHOIS (APNIC) | VietNam Data Communication Company | VN |
| 203.162.32.0/23 | BGP route | AS45899 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.36.0/23 | BGP route | AS7643 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.38.0/23 | BGP route | AS45899 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.40.0/23 | BGP route | AS45899 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.42.0/23 | BGP route | AS45899 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.44.0/23 | BGP route | AS45899 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.46.0/23 | BGP route | AS45899 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.50.0/23 | BGP route | AS7643 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.52.0/23 | BGP route | AS7643 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.52.0/23 | WHOIS (APNIC) | VietNam Data Communication Company | VN |
| 203.162.54.0/23 | BGP route | AS45899 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.56.0/23 | BGP route | AS7643 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.58.0/23 | WHOIS (APNIC) | VietNam Data Communication Company | VN |
| 203.162.36.0/24 | BGP route | AS7643 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.37.0/24 | BGP route | AS7643 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.38.0/24 | WHOIS (APNIC) | dialupcantho-net | VN |
| 203.162.43.0/24 | WHOIS (APNIC) | dialuplamdong-net | VN |
| 203.162.46.0/24 | WHOIS (APNIC) | dialupdongnai-net | VN |
| 203.162.48.0/24 | BGP route | AS45899 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.49.0/24 | BGP route | AS7643 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.50.0/24 | BGP route | AS45899 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.50.0/24 | WHOIS (APNIC) | dialupbinhphuoc-net | VN |
| 203.162.51.0/24 | BGP route | AS7643 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.52.0/24 | BGP route | AS45899 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.53.0/24 | BGP route | AS7643 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.53.0/24 | WHOIS (APNIC) | Saigon Posts and Telecommunications Corporation (SPT) | VN |
| 203.162.54.0/24 | BGP route | AS45899 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.54.0/24 | WHOIS (APNIC) | VietNam Data Communication Company | VN |
| 203.162.55.0/24 | WHOIS (APNIC) | VietNam Data Communication Company | VN |
| 203.162.56.0/24 | BGP route | AS7643 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.56.0/24 | WHOIS (APNIC) | VietNam Data Communication Company | VN |
| 203.162.57.0/24 | BGP route | AS45899 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.57.0/24 | WHOIS (APNIC) | Vietnam Internet network Information Centre - VNNIC | VN |
| 203.162.58.0/24 | BGP route | AS45899 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.59.0/24 | BGP route | AS7643 Vietnam Posts and Telecommunications (VNPT) | — |
| 203.162.35.64/26 | WHOIS (APNIC) | Vietnam Advance Software Company | VN |
| 203.162.45.0/26 | WHOIS (APNIC) | saigonriversidehotel-net | VN |
| 203.162.45.64/26 | WHOIS (APNIC) | saigonnewworldhotel-net | VN |
| 203.162.45.128/26 | WHOIS (APNIC) | Cong ty Lien doanh Dai Duong - Ocean Place | VN |
| 203.162.53.0/26 | WHOIS (APNIC) | Stelecom Mobile Phone Center | VN |
| 203.162.35.32/27 | WHOIS (APNIC) | Vietnam Advance Software Company | VN |
| 203.162.35.128/27 | WHOIS (APNIC) | Vietnam Advance Software Company | VN |
| 203.162.35.160/27 | WHOIS (APNIC) | Vietnam Mobile System | VN |
| 203.162.35.192/27 | WHOIS (APNIC) | Vietnam Mobile System | VN |
| 203.162.35.224/27 | WHOIS (APNIC) | VietNam Mobile Services Company | VN |
| 203.162.44.32/27 | WHOIS (APNIC) | TTPTCNTTDHQGHCM-NET | VN |
| 203.162.44.64/27 | WHOIS (APNIC) | TTPTCNTTDHQGHCM-NET | VN |
| 203.162.44.96/27 | WHOIS (APNIC) | Germatrans company | VN |
| 203.162.44.128/27 | WHOIS (APNIC) | Germatrans company | VN |
| 203.162.44.160/27 | WHOIS (APNIC) | PTIT Ho Chi MinhVietnam Fujitsu | VN |
| 203.162.44.192/27 | WHOIS (APNIC) | Viet Tuong electronic Company | VN |
| 203.162.45.192/27 | WHOIS (APNIC) | Vinalines Company | VN |
| 203.162.52.32/27 | WHOIS (APNIC) | Saigonsoft company | VN |
| 203.162.52.64/27 | WHOIS (APNIC) | Saigonsoft company | VN |
| 203.162.52.96/27 | WHOIS (APNIC) | Vietnam Advance Software Company | VN |
| 203.162.52.128/27 | WHOIS (APNIC) | Pouyuen | VN |
| 203.162.52.160/27 | WHOIS (APNIC) | Saigonsoft company | VN |
| 203.162.52.192/27 | WHOIS (APNIC) | Cong ty Dich vu Vien Thong GPC | VN |
| 203.162.32.16/28 | WHOIS (APNIC) | Da Nang University | VN |
| 203.162.32.32/28 | WHOIS (APNIC) | SOFTECH-NET | VN |
| 203.162.32.48/28 | WHOIS (APNIC) | Technology Education university Ho Chi Minh | VN |
| 203.162.32.64/28 | WHOIS (APNIC) | Siemens Ag Representation Vietnam | VN |
| 203.162.32.80/28 | WHOIS (APNIC) | RIM Technologies | VN |
| 203.162.32.96/28 | WHOIS (APNIC) | Vietnam Extramedia | VN |
| 203.162.32.112/28 | WHOIS (APNIC) | Duy Hung Shoes company | VN |
| 203.162.32.128/28 | WHOIS (APNIC) | Agricultural and Forestry University Ho Chi Minh | VN |
| 203.162.36.16/28 | WHOIS (APNIC) | Vietnam Brewery Ltd | VN |
| 203.162.36.32/28 | WHOIS (APNIC) | Khu Cong nghiep Bien Hoa 2, Dong Nai Province, Vietnam | VN |
| 203.162.36.80/28 | WHOIS (APNIC) | Morning star Cement | VN |