203.158.192.0/20

Currently announced by AS37932 Rajamangala University of Technology Isan, in the routed prefix 203.158.192.0/20.

Current ASN: AS37932; Rajamangala University of Technology Isan
Routed prefix: 203.158.192.0/20; Most specific route covering this prefix
ASNs over time: 1; 1 announcement record
RIR allocation: APNIC; Thailand · 203.158.128.0/17

Routing data · Nov 2, 2026, 10:24 UTC

ASN historyEvery routed prefix covering 203.158.192.0/20

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
203.158.192.0/20	AS37932	Rajamangala University of Technology Isan	Thailand	Before monitoring	2026-11-02 10:24	Announcing

More specific routes16 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
203.158.192.0/24	AS37932	Rajamangala University of Technology Isan	Thailand	Before monitoring	2026-11-02 10:24	Announcing
203.158.193.0/24	AS37932	Rajamangala University of Technology Isan	Thailand	Before monitoring	2026-11-02 10:24	Announcing
203.158.194.0/24	AS37932	Rajamangala University of Technology Isan	Thailand	Before monitoring	2026-11-02 10:24	Announcing
203.158.195.0/24	AS37932	Rajamangala University of Technology Isan	Thailand	Before monitoring	2026-11-02 10:24	Announcing
203.158.196.0/24	AS37932	Rajamangala University of Technology Isan	Thailand	Before monitoring	2026-11-02 10:24	Announcing
203.158.197.0/24	AS37932	Rajamangala University of Technology Isan	Thailand	Before monitoring	2026-11-02 10:24	Announcing
203.158.198.0/24	AS37932	Rajamangala University of Technology Isan	Thailand	Before monitoring	2026-11-02 10:24	Announcing
203.158.199.0/24	AS37932	Rajamangala University of Technology Isan	Thailand	Before monitoring	2026-11-02 10:24	Announcing
203.158.200.0/24	AS37932	Rajamangala University of Technology Isan	Thailand	Before monitoring	2026-11-02 10:24	Announcing
203.158.201.0/24	AS37932	Rajamangala University of Technology Isan	Thailand	Before monitoring	2026-11-02 10:24	Announcing
203.158.202.0/24	AS37932	Rajamangala University of Technology Isan	Thailand	Before monitoring	2026-11-02 10:24	Announcing
203.158.203.0/24	AS37932	Rajamangala University of Technology Isan	Thailand	Before monitoring	2026-11-02 10:24	Announcing
203.158.204.0/24	AS37932	Rajamangala University of Technology Isan	Thailand	Before monitoring	2026-11-02 10:24	Announcing
203.158.205.0/24	AS37932	Rajamangala University of Technology Isan	Thailand	Before monitoring	2026-11-02 10:24	Announcing
203.158.206.0/24	AS37932	Rajamangala University of Technology Isan	Thailand	Before monitoring	2026-11-02 10:24	Announcing
203.158.207.0/24	AS37932	Rajamangala University of Technology Isan	Thailand	Before monitoring	2026-11-02 10:24	Announcing

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: 203.158.128.0/17
Country: Thailand
Allocation date: 1995-10-09
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.