203.70.0.0/18

Currently announced by AS4780 New Century InfoComm Tech Co.,Ltd., in the routed prefix 203.70.0.0/18.

Current ASN: AS4780; New Century InfoComm Tech Co.,Ltd.
Routed prefix: 203.70.0.0/18; Most specific route covering this prefix
ASNs over time: 1; 2 announcement records
RIR allocation: APNIC; Taiwan · 203.70.0.0/15

Routing data · Nov 1, 2026, 22:23 UTC

ASN historyEvery routed prefix covering 203.70.0.0/18

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
203.70.0.0/18	AS4780	New Century InfoComm Tech Co.,Ltd.	Taiwan	Before monitoring	2026-11-01 22:23	Announcing
203.70.0.0/16	AS4780	New Century InfoComm Tech Co.,Ltd.	Taiwan	Before monitoring	2026-11-01 22:23	Announcing

More specific routes17 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
203.70.0.0/19	AS4780	New Century InfoComm Tech Co.,Ltd.	Taiwan	Before monitoring	2026-11-01 22:23	Announcing
203.70.8.0/24	AS4780	New Century InfoComm Tech Co.,Ltd.	Taiwan	Before monitoring	2026-11-01 22:23	Announcing
203.70.10.0/24	AS4780	New Century InfoComm Tech Co.,Ltd.	Taiwan	Before monitoring	2026-11-01 22:23	Announcing
203.70.11.0/24	AS4780	New Century InfoComm Tech Co.,Ltd.	Taiwan	Before monitoring	2026-11-01 22:23	Announcing
203.70.16.0/24	AS4780	New Century InfoComm Tech Co.,Ltd.	Taiwan	Before monitoring	2026-11-01 22:23	Announcing
203.70.17.0/24	AS4780	New Century InfoComm Tech Co.,Ltd.	Taiwan	Before monitoring	2026-11-01 22:23	Announcing
203.70.18.0/24	AS4780	New Century InfoComm Tech Co.,Ltd.	Taiwan	Before monitoring	2026-11-01 22:23	Announcing
203.70.19.0/24	AS4780	New Century InfoComm Tech Co.,Ltd.	Taiwan	Before monitoring	2026-11-01 22:23	Announcing
203.70.20.0/24	AS4780	New Century InfoComm Tech Co.,Ltd.	Taiwan	Before monitoring	2026-11-01 22:23	Announcing
203.70.21.0/24	AS4780	New Century InfoComm Tech Co.,Ltd.	Taiwan	Before monitoring	2026-11-01 22:23	Announcing
203.70.22.0/24	AS4780	New Century InfoComm Tech Co.,Ltd.	Taiwan	Before monitoring	2026-11-01 22:23	Announcing
203.70.23.0/24	AS4780	New Century InfoComm Tech Co.,Ltd.	Taiwan	Before monitoring	2026-11-01 22:23	Announcing
203.70.24.0/24	AS4780	New Century InfoComm Tech Co.,Ltd.	Taiwan	Before monitoring	2026-11-01 22:23	Announcing
203.70.32.0/19	AS4780	New Century InfoComm Tech Co.,Ltd.	Taiwan	Before monitoring	2026-11-01 22:23	Announcing
203.70.40.0/24	AS4780	New Century InfoComm Tech Co.,Ltd.	Taiwan	Before monitoring	2026-11-01 22:23	Announcing
203.70.42.0/24	AS4780	New Century InfoComm Tech Co.,Ltd.	Taiwan	Before monitoring	2026-11-01 22:23	Announcing
203.70.43.0/24	AS4780	New Century InfoComm Tech Co.,Ltd.	Taiwan	Before monitoring	2026-11-01 22:23	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: 203.70.0.0/15
Country: Taiwan
Allocation date: 1995-12-06
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.