2a01:5a8:308::/46

Currently announced by AS8866 Vivacom Bulgaria EAD, in the routed prefix 2a01:5a8:308::/46.

Routing data · Nov 2, 2026, 00:27 UTC

ASN historyEvery routed prefix covering 2a01:5a8:308::/46

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
2a01:5a8:308::/46	AS8866	Vivacom Bulgaria EAD	Bulgaria	2026-10-28 10:20	2026-11-02 00:27	Announcing
2a01:5a8::/32	AS8866	Vivacom Bulgaria EAD	Bulgaria	Before monitoring	2026-11-02 00:27	Announcing

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
2a01:5a8:308::/47	AS8866	Vivacom Bulgaria EAD	Bulgaria	Before monitoring	2026-10-23 12:18	Stopped
2a01:5a8:30a::/47	AS8866	Vivacom Bulgaria EAD	Bulgaria	Before monitoring	2026-10-23 12:18	Stopped

Detected (UTC)	Prefix	Change	ASN	Name	Previous ASN	Country
2026-10-28 10:20	2a01:5a8:308::/46	New announcement	AS8866	Vivacom Bulgaria EAD	—	Bulgaria

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.