| 203.0.0.0/8 | WHOIS (APNIC) | Asia Pacific Network Information Center, Pty. Ltd. | AU |
| 203.144.128.0/17 | BGP route | AS7470 KGI Securities (Thailand) Public Company Limited | — |
| 203.144.128.0/17 | WHOIS (APNIC) | TRUE INTERNET CORPORATION CO. LTD. | TH |
| 203.144.192.0/19 | APNIC assigned | — | TH |
| 203.144.192.0/20 | BGP route | AS7470 KGI Securities (Thailand) Public Company Limited | — |
| 203.144.208.0/20 | BGP route | AS7470 KGI Securities (Thailand) Public Company Limited | — |
| 203.144.202.0/23 | WHOIS (APNIC) | Internet Service Provider | TH |
| 203.144.204.0/23 | WHOIS (APNIC) | Internet Service Provider | TH |
| 203.144.192.0/24 | BGP route | AS7470 KGI Securities (Thailand) Public Company Limited | — |
| 203.144.192.0/24 | WHOIS (APNIC) | ASIANFO-TH Customer Wan Connect | TH |
| 203.144.194.0/24 | BGP route | AS7470 KGI Securities (Thailand) Public Company Limited | — |
| 203.144.196.0/24 | BGP route | AS7470 KGI Securities (Thailand) Public Company Limited | — |
| 203.144.197.0/24 | BGP route | AS7470 KGI Securities (Thailand) Public Company Limited | — |
| 203.144.198.0/24 | BGP route | AS7470 KGI Securities (Thailand) Public Company Limited | — |
| 203.144.200.0/24 | WHOIS (APNIC) | FIXED IP WAN for ASIANFO-TH customer | TH |
| 203.144.201.0/24 | BGP route | AS7470 KGI Securities (Thailand) Public Company Limited | — |
| 203.144.201.0/24 | WHOIS (APNIC) | CUSTLAN-ASIANET | TH |
| 203.144.203.0/24 | BGP route | AS7470 KGI Securities (Thailand) Public Company Limited | — |
| 203.144.205.0/24 | BGP route | AS7470 KGI Securities (Thailand) Public Company Limited | — |
| 203.144.206.0/24 | BGP route | AS7470 KGI Securities (Thailand) Public Company Limited | — |
| 203.144.206.0/24 | WHOIS (APNIC) | Internet Service Provider | TH |
| 203.144.207.0/24 | BGP route | AS7470 KGI Securities (Thailand) Public Company Limited | — |
| 203.144.210.0/24 | BGP route | AS7470 KGI Securities (Thailand) Public Company Limited | — |
| 203.144.210.0/24 | WHOIS (APNIC) | FIx WAN IP ADSL for ASIAINFO-TH | TH |
| 203.144.211.0/24 | BGP route | AS7470 KGI Securities (Thailand) Public Company Limited | — |
| 203.144.212.0/24 | BGP route | AS7470 KGI Securities (Thailand) Public Company Limited | — |
| 203.144.212.0/24 | WHOIS (APNIC) | FIx WAN IP ADSL for ASIAINFO-TH | TH |
| 203.144.217.0/24 | BGP route | AS7470 KGI Securities (Thailand) Public Company Limited | — |
| 203.144.218.0/24 | BGP route | AS7470 KGI Securities (Thailand) Public Company Limited | — |
| 203.144.219.0/24 | BGP route | AS7470 KGI Securities (Thailand) Public Company Limited | — |
| 203.144.219.0/24 | WHOIS (APNIC) | IP Wan connect for ASIAINFO-TH | TH |
| 203.144.222.0/24 | BGP route | AS7470 KGI Securities (Thailand) Public Company Limited | — |
| 203.144.222.0/24 | WHOIS (APNIC) | Asianet Server Farm | TH |
| 203.144.201.96/27 | WHOIS (APNIC) | QSNCC TH | TH |
| 203.144.197.0/28 | WHOIS (APNIC) | Faculty of commerce and accountancy of TU | TH |
| 203.144.201.192/29 | WHOIS (APNIC) | SIAM TELE FREE | TH |
| 203.144.192.188/30 | WHOIS (APNIC) | Wan of API Future Tech Link3 | TH |
| 203.144.207.152/30 | WHOIS (APNIC) | Pichai Unguen Vontact | TH |
| 203.144.209.176/30 | WHOIS (APNIC) | Wan for Nation Digital Media Link2 | TH |
| 203.144.195.82/32 | WHOIS (APNIC) | Hataitarn Jamphol | TH |
| 203.144.210.81/32 | WHOIS (APNIC) | Wintech Microelectronics | TH |
| 203.144.210.109/32 | WHOIS (APNIC) | Pricition Technology Co.,Ltd. | TH |
| 203.144.210.114/32 | WHOIS (APNIC) | Pattara Securities | TH |
| 203.144.210.115/32 | WHOIS (APNIC) | Christie's Auction TH | TH |
| 203.144.210.145/32 | WHOIS (APNIC) | Salee Printing | TH |
| 203.144.210.248/32 | WHOIS (APNIC) | HTR Ltd. | TH |
| 203.144.212.32/32 | WHOIS (APNIC) | Rhom Intigrated Semiconductor Co., Ltd. Local/Inter:256k/256k | TH |
| 203.144.212.86/32 | WHOIS (APNIC) | International Gem Exchange | TH |
| 203.144.212.129/32 | WHOIS (APNIC) | Wan of Jason Caddies | TH |