| 203.0.0.0/8 | WHOIS (APNIC) | Asia Pacific Network Information Center, Pty. Ltd. | AU |
| 203.156.0.0/17 | BGP route | AS7616 JasTel Network Company Limited | — |
| 203.156.0.0/18 | APNIC assigned | — | TH |
| 203.156.0.0/20 | BGP route | AS7616 JasTel Network Company Limited | — |
| 203.156.16.0/20 | BGP route | AS7616 JasTel Network Company Limited | — |
| 203.156.32.0/20 | BGP route | AS7616 JasTel Network Company Limited | — |
| 203.156.48.0/20 | BGP route | AS7616 JasTel Network Company Limited | — |
| 203.156.48.0/20 | WHOIS (APNIC) | JasTel Network Company Limited | TH |
| 203.156.8.0/21 | BGP route | AS55423 JasTel Network Company Limited | — |
| 203.156.8.0/21 | WHOIS (APNIC) | JasTel Network Company Limited | TH |
| 203.156.16.0/21 | WHOIS (APNIC) | JasTel Network Company Limited | TH |
| 203.156.32.0/21 | WHOIS (APNIC) | JasTel Network Company Limited | TH |
| 203.156.40.0/21 | WHOIS (APNIC) | JasTel Network Company Limited | TH |
| 203.156.0.0/22 | BGP route | AS55423 JasTel Network Company Limited | — |
| 203.156.0.0/22 | WHOIS (APNIC) | JasTel Network Company Limited | TH |
| 203.156.8.0/22 | WHOIS (APNIC) | JasTel Network | TH |
| 203.156.12.0/22 | WHOIS (APNIC) | JasTel Network | TH |
| 203.156.24.0/22 | WHOIS (APNIC) | JasTel Network Company Limited | TH |
| 203.156.32.0/22 | WHOIS (APNIC) | JasTel Network | TH |
| 203.156.36.0/22 | WHOIS (APNIC) | JasTel Network | TH |
| 203.156.40.0/22 | BGP route | AS55423 JasTel Network Company Limited | — |
| 203.156.4.0/23 | WHOIS (APNIC) | JasTel Network Company Limited | TH |
| 203.156.6.0/23 | WHOIS (APNIC) | JasTel Network Company Limited | TH |
| 203.156.28.0/23 | WHOIS (APNIC) | JasTel Network Company Limited | TH |
| 203.156.30.0/23 | WHOIS (APNIC) | JasTel Network Company Limited | TH |
| 203.156.46.0/23 | BGP route | AS55423 JasTel Network Company Limited | — |
| 203.156.48.0/23 | BGP route | AS55423 JasTel Network Company Limited | — |
| 203.156.54.0/23 | BGP route | AS132203 Shenzhen Tencent Computer Systems Company Limited | — |
| 203.156.6.0/24 | WHOIS (APNIC) | JasTel Network | TH |
| 203.156.7.0/24 | BGP route | AS147187 JasTel Network Company Limited | — |
| 203.156.7.0/24 | WHOIS (APNIC) | JasTel Network | TH |
| 203.156.9.0/24 | BGP route | AS55423 JasTel Network Company Limited | — |
| 203.156.15.0/24 | BGP route | AS134089 JasTel Network Company Limited | — |
| 203.156.16.0/24 | BGP route | AS55423 JasTel Network Company Limited | — |
| 203.156.18.0/24 | BGP route | AS7616 JasTel Network Company Limited | — |
| 203.156.24.0/24 | BGP route | AS55423 JasTel Network Company Limited | — |
| 203.156.25.0/24 | BGP route | AS55423 JasTel Network Company Limited | — |
| 203.156.26.0/24 | BGP route | AS55423 JasTel Network Company Limited | — |
| 203.156.27.0/24 | BGP route | AS55423 JasTel Network Company Limited | — |
| 203.156.28.0/24 | BGP route | AS55423 JasTel Network Company Limited | — |
| 203.156.30.0/24 | BGP route | AS135381 Symphony Communication Public Company Limited | — |
| 203.156.31.0/24 | BGP route | AS55423 JasTel Network Company Limited | — |
| 203.156.32.0/24 | BGP route | AS152727 Symphony Communication Public Company Limited | — |
| 203.156.33.0/24 | BGP route | AS134089 JasTel Network Company Limited | — |
| 203.156.40.0/24 | WHOIS (APNIC) | JasTel Network Jasmine International Tower 200 Moo 4 Cheangwattana Rd | TH |
| 203.156.41.0/24 | WHOIS (APNIC) | JasTel Network Jasmine International Tower 200 Moo 4 Cheangwattana Rd | TH |
| 203.156.42.0/24 | WHOIS (APNIC) | JasTel Network Jasmine International Tower 200 Moo 4 Cheangwattana Rd | TH |
| 203.156.43.0/24 | WHOIS (APNIC) | JasTel Network Jasmine International Tower 200 Moo 4 Cheangwattana Rd | TH |
| 203.156.51.0/24 | BGP route | AS55423 JasTel Network Company Limited | — |
| 203.156.52.0/24 | BGP route | AS55423 JasTel Network Company Limited | — |
| 203.156.57.0/24 | BGP route | AS55423 JasTel Network Company Limited | — |
| 203.156.59.0/24 | BGP route | AS55423 JasTel Network Company Limited | — |
| 203.156.60.0/24 | BGP route | AS55423 JasTel Network Company Limited | — |