1.54.192.0/18

Currently announced by AS18403 FPT Telecom, in the routed prefix 1.54.192.0/18.

Current ASN: AS18403; FPT Telecom
Routed prefix: 1.54.192.0/18; Most specific route covering this prefix
ASNs over time: 1; 2 announcement records
RIR allocation: APNIC; Vietnam · 1.52.0.0/14

Routing data · Nov 2, 2026, 06:27 UTC

ASN historyEvery routed prefix covering 1.54.192.0/18

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
1.54.192.0/18	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.52.0.0/14	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing

More specific routes53 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
1.54.192.0/20	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.192.0/22	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.194.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.195.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.196.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.197.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.199.0/24	AS18403	FPT Telecom	Vietnam	2026-10-28 22:21	2026-11-02 06:27	Announcing
1.54.200.0/22	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.204.0/22	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.208.0/20	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.208.0/21	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.216.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.217.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.218.0/23	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.220.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.221.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.222.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.223.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.224.0/20	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.224.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.225.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.226.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.227.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.228.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.229.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.230.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.231.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.233.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.234.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.235.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.236.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.237.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.238.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.239.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.240.0/20	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.240.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.241.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.242.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.243.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.244.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.245.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.246.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.247.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.248.0/21	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.248.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.249.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.250.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.251.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.252.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.254.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.255.0/24	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-11-02 06:27	Announcing
1.54.198.0/23	AS18403	FPT Telecom	Vietnam	Before monitoring	2026-10-29 00:23	Stopped
1.54.198.0/24	AS18403	FPT Telecom	Vietnam	2026-10-28 22:21	2026-11-02 04:24	Stopped

Change logAll changes

The routes covering this address have had no origin changes since ASNBase started monitoring.

Look up another address

RIR allocation record

Registry: APNIC
Allocated block: 1.52.0.0/14
Country: Vietnam
Allocation date: 2010-05-26
Status: allocated

From the RIRs’ delegated statistics files. Shows where the addresses are registered, not where they are used.

How monitoring works

Every 2 hours ASNBase takes the bgp.tools global routing table (prefix → origin ASN) and compares it with the previous one. The detected time is the time of that comparison; the actual change can be up to about 2 hours earlier.
Only routes seen by more than 100 bgp.tools peers are listed as changes; routes with less visibility are only kept in the history.
A new announcement counts only if it is still in the next routing table, and a withdrawal only if the prefix is missing from two tables in a row, so short flaps are ignored.
ASNBase has been monitoring since 2026-10-19. “Before monitoring” under “First seen” means the route was already announced when monitoring started; the earlier date is unknown.
Prefixes first seen during the first day of monitoring do not count as new announcements: most of them were simply missing from the table at the moment monitoring started.
Countries and regions follow the ASN’s registration, not the actual location of the IP addresses.