183.81.52.0/23
Currently announced by AS18403 FPT Telecom, in the routed prefix 183.81.48.0/20.
- Current ASN
- AS18403
- FPT Telecom
- Routed prefix
- 183.81.48.0/20
- Most specific route covering this prefix
- ASNs over time
- 1
- 4 announcement records
- RIR allocation
- APNIC
- Vietnam · 183.81.0.0/17
Routing data · Nov 1, 2026, 20:20 UTC
ASN historyEvery routed prefix covering 183.81.52.0/23
| Prefix | ASN | Name | Registered country | First seen (UTC) | Last seen (UTC) | Status |
|---|---|---|---|---|---|---|
| 183.81.52.0/23 | AS18403 | FPT Telecom |  Vietnam | 2026-10-27 10:19 | 2026-11-01 08:25 | Stopped |
| 183.81.48.0/20 | AS18403 | FPT Telecom | Vietnam | Before monitoring | 2026-11-01 20:20 | Announcing |
| 183.81.0.0/18 | AS18403 | FPT Telecom | Vietnam | Before monitoring | 2026-11-01 20:20 | Announcing |
| 183.81.0.0/17 | AS18403 | FPT Telecom | Vietnam | Before monitoring | 2026-11-01 20:20 | Announcing |
More specific routes0 total
No more specific routes inside this prefix.
Change logAll changes
| Detected (UTC) | Prefix | Change | ASN | Name | Previous ASN | Country |
|---|---|---|---|---|---|---|
| 2026-11-01 10:25 | 183.81.52.0/23 | Withdrawal | AS18403 | FPT Telecom | — | Vietnam |
| 2026-10-28 06:19 | 183.81.52.0/23 | Withdrawal | AS18403 | FPT Telecom | — | Vietnam |
| 2026-10-27 10:19 | 183.81.52.0/23 | New announcementNo longer announced | AS18403 | FPT Telecom | — | Vietnam |