2401:4520:2087::/48

Currently announced by AS149020 WebHorizon Internet Services, in the routed prefix 2401:4520:2000::/36.

Current ASN: AS149020; WebHorizon Internet Services
Routed prefix: 2401:4520:2000::/36; Most specific route covering this prefix
ASNs over time: 1; 2 announcement records
RIR allocation: APNIC; India · 2401:4520::/32

Routing data · Nov 2, 2026, 02:24 UTC

ASN historyEvery routed prefix covering 2401:4520:2087::/48

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
2401:4520:2087::/48	AS149020	WebHorizon Internet Services	Singapore	2026-10-28 14:20	2026-10-29 00:23	Stopped
2401:4520:2000::/36	AS149020	WebHorizon Internet Services	Singapore	Before monitoring	2026-11-02 02:24	Announcing

No more specific routes inside this prefix.

Detected (UTC)	Prefix	Change	ASN	Name	Previous ASN	Country
2026-10-29 02:22	2401:4520:2087::/48	Withdrawal	AS149020	WebHorizon Internet Services	—	Singapore
2026-10-28 14:20	2401:4520:2087::/48	New announcementNo longer announced	AS149020	WebHorizon Internet Services	—	Singapore

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

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.