123.204.21.0/24
Currently announced by AS4780 New Century InfoComm Tech Co.,Ltd., in the routed prefix 123.204.0.0/19.
- Current ASN
- AS4780
- New Century InfoComm Tech Co.,Ltd.
- Routed prefix
- 123.204.0.0/19
- Most specific route covering this prefix
- ASNs over time
- 1
- 5 announcement records
- RIR allocation
- APNIC
- Taiwan · 123.204.0.0/15
Routing data · Nov 2, 2026, 00:27 UTC
ASN historyEvery routed prefix covering 123.204.21.0/24
| Prefix | ASN | Name | Registered country | First seen (UTC) | Last seen (UTC) | Status |
|---|---|---|---|---|---|---|
| 123.204.21.0/24 | AS4780 | New Century InfoComm Tech Co.,Ltd. |  Taiwan | 2026-10-25 14:20 | 2026-10-25 20:18 | Stopped |
| 123.204.0.0/19 | AS4780 | New Century InfoComm Tech Co.,Ltd. | Taiwan | Before monitoring | 2026-11-02 00:27 | Announcing |
| 123.204.0.0/18 | AS4780 | New Century InfoComm Tech Co.,Ltd. | Taiwan | Before monitoring | 2026-11-02 00:27 | Announcing |
| 123.204.0.0/16 | AS4780 | New Century InfoComm Tech Co.,Ltd. | Taiwan | Before monitoring | 2026-11-02 00:27 | Announcing |
| 123.204.0.0/15 | AS4780 | New Century InfoComm Tech Co.,Ltd. | Taiwan | Before monitoring | 2026-11-02 00:27 | Announcing |
More specific routes0 total
No more specific routes inside this prefix.
Change logAll changes
| Detected (UTC) | Prefix | Change | ASN | Name | Previous ASN | Country |
|---|---|---|---|---|---|---|
| 2026-10-25 22:20 | 123.204.21.0/24 | Withdrawal | AS4780 | New Century InfoComm Tech Co.,Ltd. | — | Taiwan |
| 2026-10-25 14:20 | 123.204.21.0/24 | New announcementNo longer announced | AS4780 | New Century InfoComm Tech Co.,Ltd. | — | Taiwan |