42.123.64.0/18

Currently announced by AS58519 Cloud Computing Corporation, in the routed prefix 42.123.64.0/18.

Current ASN: AS58519; Cloud Computing Corporation
Routed prefix: 42.123.64.0/18; Most specific route covering this prefix
ASNs over time: 1; 1 announcement record
RIR allocation: APNIC; China · 42.123.64.0/18

Routing data · Nov 1, 2026, 18:24 UTC

ASN historyEvery routed prefix covering 42.123.64.0/18

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
42.123.64.0/18	AS58519	Cloud Computing Corporation	China	Before monitoring	2026-11-01 18:24	Announcing

More specific routes17 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
42.123.64.0/19	AS58519	Cloud Computing Corporation	China	Before monitoring	2026-11-01 18:24	Announcing
42.123.96.0/19	AS58519	Cloud Computing Corporation	China	Before monitoring	2026-11-01 18:24	Announcing
42.123.98.0/24	AS58519	Cloud Computing Corporation	China	Before monitoring	2026-11-01 18:24	Announcing
42.123.101.0/24	AS58519	Cloud Computing Corporation	China	Before monitoring	2026-11-01 18:24	Announcing
42.123.103.0/24	AS58519	Cloud Computing Corporation	China	Before monitoring	2026-11-01 18:24	Announcing
42.123.104.0/24	AS58519	Cloud Computing Corporation	China	Before monitoring	2026-11-01 18:24	Announcing
42.123.106.0/24	AS58519	Cloud Computing Corporation	China	Before monitoring	2026-11-01 18:24	Announcing
42.123.107.0/24	AS58519	Cloud Computing Corporation	China	Before monitoring	2026-11-01 18:24	Announcing
42.123.108.0/24	AS58519	Cloud Computing Corporation	China	Before monitoring	2026-11-01 18:24	Announcing
42.123.114.0/24	AS58519	Cloud Computing Corporation	China	Before monitoring	2026-11-01 18:24	Announcing
42.123.117.0/24	AS58519	Cloud Computing Corporation	China	Before monitoring	2026-11-01 18:24	Announcing
42.123.118.0/24	AS58519	Cloud Computing Corporation	China	Before monitoring	2026-11-01 18:24	Announcing
42.123.120.0/21	AS58519	Cloud Computing Corporation	China	Before monitoring	2026-11-01 18:24	Announcing
42.123.120.0/24	AS58519	Cloud Computing Corporation	China	Before monitoring	2026-11-01 18:24	Announcing
42.123.125.0/24	AS58519	Cloud Computing Corporation	China	Before monitoring	2026-11-01 18:24	Announcing
42.123.127.0/24	AS58519	Cloud Computing Corporation	China	Before monitoring	2026-11-01 18:24	Announcing
42.123.102.0/24	AS58519	Cloud Computing Corporation	China	2026-10-31 18:24	2026-11-01 00:27	Stopped

Change logAll changes

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

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RIR allocation record

Registry: APNIC
Allocated block: 42.123.64.0/18
Country: China
Allocation date: 2011-04-12
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.