203.237.128.0/17
Currently announced by AS4766 KT Corporation (Korea Telecom), in the routed prefix 203.237.128.0/17.
- Current ASN
- AS4766
- KT Corporation (Korea Telecom)
- Routed prefix
- 203.237.128.0/17
- Most specific route covering this prefix
- ASNs over time
- 1
- 1 announcement record
- RIR allocation
- APNIC
- South Korea · 203.237.128.0/17
Routing data · Nov 8, 2026, 10:26 UTC
ASN historyEvery routed prefix covering 203.237.128.0/17
| Prefix | ASN | Name | Registered country | First seen (UTC) | Last seen (UTC) | Status |
|---|---|---|---|---|---|---|
| 203.237.128.0/17 | AS4766 | KT Corporation (Korea Telecom) |  South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
More specific routes71 total
| Prefix | ASN | Name | Registered country | First seen (UTC) | Last seen (UTC) | Status |
|---|---|---|---|---|---|---|
| 203.237.128.0/19 | AS3786 | LG Uplus | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.128.0/20 | AS23983 | Daejeon University | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.144.0/21 | AS23983 | Daejeon University | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.152.0/23 | AS23983 | Daejeon University | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.154.0/24 | AS4766 | KT Corporation (Korea Telecom) | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.156.0/24 | AS4766 | KT Corporation (Korea Telecom) | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.157.0/24 | AS4766 | KT Corporation (Korea Telecom) | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.158.0/24 | AS4766 | KT Corporation (Korea Telecom) | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.159.0/24 | AS4766 | KT Corporation (Korea Telecom) | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.160.0/24 | AS3786 | LG Uplus | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.161.0/24 | AS3786 | LG Uplus | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.162.0/24 | AS3786 | LG Uplus | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.163.0/24 | AS3786 | LG Uplus | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.164.0/24 | AS3786 | LG Uplus | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.165.0/24 | AS3786 | LG Uplus | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.166.0/24 | AS3786 | LG Uplus | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.167.0/24 | AS3786 | LG Uplus | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.168.0/24 | AS18031 | Sangmyung University | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.169.0/24 | AS18031 | Sangmyung University | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.170.0/24 | AS18031 | Sangmyung University | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.171.0/24 | AS18031 | Sangmyung University | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.172.0/23 | AS3786 | LG Uplus | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.172.0/24 | AS18031 | Sangmyung University | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.173.0/24 | AS18031 | Sangmyung University | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.174.0/24 | AS18031 | Sangmyung University | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.175.0/24 | AS18031 | Sangmyung University | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.176.0/21 | AS18329 | Sangmyung University | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.184.0/22 | AS17614 | Geumgang University | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.188.0/23 | AS18319 | YeungNam College of Science Technology | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.190.0/24 | AS9318 | SK Broadband | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.191.0/24 | AS4766 | KT Corporation (Korea Telecom) | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.192.0/21 | AS4766 | KT Corporation (Korea Telecom) | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.200.0/24 | AS4766 | KT Corporation (Korea Telecom) | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.201.0/24 | AS18329 | Sangmyung University | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.202.0/23 | AS18026 | JEJU NATIONAL UNIVERSITY | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.204.0/24 | AS4766 | KT Corporation (Korea Telecom) | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.205.0/24 | AS4766 | KT Corporation (Korea Telecom) | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.206.0/24 | AS4766 | KT Corporation (Korea Telecom) | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.207.0/24 | AS4766 | KT Corporation (Korea Telecom) | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.208.0/24 | AS4766 | KT Corporation (Korea Telecom) | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.209.0/24 | AS4766 | KT Corporation (Korea Telecom) | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.210.0/24 | AS4766 | KT Corporation (Korea Telecom) | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.211.0/24 | AS4766 | KT Corporation (Korea Telecom) | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.212.0/24 | AS4766 | KT Corporation (Korea Telecom) | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.213.0/24 | AS4766 | KT Corporation (Korea Telecom) | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.214.0/24 | AS4766 | KT Corporation (Korea Telecom) | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.215.0/24 | AS4766 | KT Corporation (Korea Telecom) | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.216.0/24 | AS9318 | SK Broadband | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.217.0/24 | AS9318 | SK Broadband | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.218.0/24 | AS9318 | SK Broadband | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.219.0/24 | AS9318 | SK Broadband | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.220.0/24 | AS9318 | SK Broadband | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.221.0/24 | AS9318 | SK Broadband | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.222.0/24 | AS9318 | SK Broadband | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.223.0/24 | AS9318 | SK Broadband | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.224.0/24 | AS4766 | KT Corporation (Korea Telecom) | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.225.0/24 | AS4766 | KT Corporation (Korea Telecom) | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.226.0/24 | AS9318 | SK Broadband | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.227.0/24 | AS4766 | KT Corporation (Korea Telecom) | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.228.0/24 | AS4766 | KT Corporation (Korea Telecom) | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.229.0/24 | AS4766 | KT Corporation (Korea Telecom) | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.230.0/24 | AS4766 | KT Corporation (Korea Telecom) | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.231.0/24 | AS4766 | KT Corporation (Korea Telecom) | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.232.0/21 | AS4766 | KT Corporation (Korea Telecom) | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.240.0/21 | AS9318 | SK Broadband | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.248.0/24 | AS18329 | Sangmyung University | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.249.0/24 | AS18329 | Sangmyung University | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.251.0/24 | AS23586 | Korean Council for University Education | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.254.0/24 | AS38694 | CHEONGJU NATIONAL UNIVERSITY OF EDCATION | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.255.0/24 | AS38694 | CHEONGJU NATIONAL UNIVERSITY OF EDCATION | South Korea | Before monitoring | 2026-11-08 10:26 | Announcing |
| 203.237.250.0/24 | AS4766 | KT Corporation (Korea Telecom) | South Korea | Before monitoring | 2026-11-05 12:23 | Stopped |
Change logAll changes
The routes covering this address have had no origin changes since ASNBase started monitoring.