2a12:3fc2:df00::/40

Currently announced by AS208223 fOxO Internet Service Provider, in the routed prefix 2a12:3fc2:df00::/40.

Current ASN: AS208223; fOxO Internet Service Provider
Routed prefix: 2a12:3fc2:df00::/40; Most specific route covering this prefix
ASNs over time: 1; 1 announcement record
RIR allocation: RIPENCC; Lithuania · 2a12:3fc0::/29

Routing data · Nov 1, 2026, 18:24 UTC

ASN historyEvery routed prefix covering 2a12:3fc2:df00::/40

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
2a12:3fc2:df00::/40	AS208223	fOxO Internet Service Provider	Taiwan	Before monitoring	2026-11-01 18:24	Announcing

More specific routes16 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
2a12:3fc2:df11::/48	AS208223	fOxO Internet Service Provider	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
2a12:3fc2:dfaa::/48	AS208223	fOxO Internet Service Provider	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
2a12:3fc2:dfca::/48	AS208223	fOxO Internet Service Provider	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
2a12:3fc2:dfcf::/48	AS208223	fOxO Internet Service Provider	Taiwan	2026-11-01 14:24	2026-11-01 18:24	Announcing
2a12:3fc2:dfd0::/48	AS208223	fOxO Internet Service Provider	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
2a12:3fc2:dfd2::/48	AS208223	fOxO Internet Service Provider	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
2a12:3fc2:dfd3::/48	AS208223	fOxO Internet Service Provider	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
2a12:3fc2:dfd5::/48	AS208223	fOxO Internet Service Provider	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
2a12:3fc2:dfd6::/48	AS208223	fOxO Internet Service Provider	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
2a12:3fc2:dfd8::/48	AS208223	fOxO Internet Service Provider	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
2a12:3fc2:dfd9::/48	AS208223	fOxO Internet Service Provider	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
2a12:3fc2:dfdb::/48	AS208223	fOxO Internet Service Provider	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
2a12:3fc2:dfdc::/48	AS208223	fOxO Internet Service Provider	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
2a12:3fc2:dfdd::/48	AS208223	fOxO Internet Service Provider	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
2a12:3fc2:dfde::/48	AS208223	fOxO Internet Service Provider	Taiwan	Before monitoring	2026-11-01 18:24	Announcing
2a12:3fc2:dfdf::/48	AS208223	fOxO Internet Service Provider	Taiwan	Before monitoring	2026-11-01 18:24	Announcing

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: RIPENCC
Allocated block: 2a12:3fc0::/29
Country: Lithuania
Allocation date: 2022-01-05
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.