42.96.32.0/19

Currently announced by AS45903 CMC Telecom, in the routed prefix 42.96.32.0/19.

Current ASN: AS45903; CMC Telecom
Routed prefix: 42.96.32.0/19; Most specific route covering this prefix
ASNs over time: 1; 1 announcement record
RIR allocation: APNIC; Vietnam · 42.96.32.0/19

Routing data · Nov 2, 2026, 08:23 UTC

ASN historyEvery routed prefix covering 42.96.32.0/19

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
42.96.32.0/19	AS45903	CMC Telecom	Vietnam	Before monitoring	2026-11-02 08:23	Announcing

More specific routes27 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
42.96.32.0/24	AS38732	CMC Telecom Infrastructure Company	Vietnam	Before monitoring	2026-11-02 08:23	Announcing
42.96.33.0/24	AS38733	CMC Telecom Infrastructure Company	Vietnam	Before monitoring	2026-11-02 08:23	Announcing
42.96.34.0/24	AS38732	CMC Telecom Infrastructure Company	Vietnam	Before monitoring	2026-11-02 08:23	Announcing
42.96.35.0/24	AS38732	CMC Telecom Infrastructure Company	Vietnam	Before monitoring	2026-11-02 08:23	Announcing
42.96.36.0/24	AS38733	CMC Telecom Infrastructure Company	Vietnam	Before monitoring	2026-11-02 08:23	Announcing
42.96.37.0/24	AS38733	CMC Telecom Infrastructure Company	Vietnam	Before monitoring	2026-11-02 08:23	Announcing
42.96.38.0/24	AS45903	CMC Telecom	Vietnam	Before monitoring	2026-11-02 08:23	Announcing
42.96.39.0/24	AS45903	CMC Telecom	Vietnam	Before monitoring	2026-11-02 08:23	Announcing
42.96.40.0/22	AS45903	CMC Telecom	Vietnam	Before monitoring	2026-11-02 08:23	Announcing
42.96.44.0/22	AS45903	CMC Telecom	Vietnam	Before monitoring	2026-11-02 08:23	Announcing
42.96.48.0/24	AS45903	CMC Telecom	Vietnam	Before monitoring	2026-11-02 08:23	Announcing
42.96.49.0/24	AS45903	CMC Telecom	Vietnam	Before monitoring	2026-11-02 08:23	Announcing
42.96.50.0/24	AS45903	CMC Telecom	Vietnam	Before monitoring	2026-11-02 08:23	Announcing
42.96.51.0/24	AS45903	CMC Telecom	Vietnam	Before monitoring	2026-11-02 08:23	Announcing
42.96.52.0/24	AS45903	CMC Telecom	Vietnam	Before monitoring	2026-11-02 08:23	Announcing
42.96.53.0/24	AS45903	CMC Telecom	Vietnam	Before monitoring	2026-11-02 08:23	Announcing
42.96.54.0/24	AS45903	CMC Telecom	Vietnam	Before monitoring	2026-11-02 08:23	Announcing
42.96.55.0/24	AS45903	CMC Telecom	Vietnam	Before monitoring	2026-11-02 08:23	Announcing
42.96.56.0/24	AS45903	CMC Telecom	Vietnam	Before monitoring	2026-11-02 08:23	Announcing
42.96.57.0/24	AS45903	CMC Telecom	Vietnam	Before monitoring	2026-11-02 08:23	Announcing
42.96.58.0/23	AS45903	CMC Telecom	Vietnam	Before monitoring	2026-11-02 08:23	Announcing
42.96.60.0/23	AS45903	CMC Telecom	Vietnam	Before monitoring	2026-11-02 08:23	Announcing
42.96.63.0/24	AS38732	CMC Telecom Infrastructure Company	Vietnam	Before monitoring	2026-11-02 08:23	Announcing
42.96.40.0/24	AS45903	CMC Telecom	Vietnam	2026-10-25 14:20	2026-10-25 20:18	Stopped
42.96.41.0/24	AS45903	CMC Telecom	Vietnam	2026-10-25 14:20	2026-10-26 20:22	Stopped
42.96.42.0/24	AS45903	CMC Telecom	Vietnam	2026-10-25 14:20	2026-10-25 20:18	Stopped
42.96.43.0/24	AS45903	CMC Telecom	Vietnam	2026-10-25 14:20	2026-10-25 20:18	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: 42.96.32.0/19
Country: Vietnam
Allocation date: 2011-03-29
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.