2400:1c00::/32

Currently announced by AS45143 SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore, in the routed prefix 2400:1c00::/32.

Current ASN: AS45143; SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore
Routed prefix: 2400:1c00::/32; Most specific route covering this prefix
ASNs over time: 1; 1 announcement record
RIR allocation: APNIC; Singapore · 2400:1c00::/32

Routing data · Nov 8, 2026, 10:26 UTC

ASN historyEvery routed prefix covering 2400:1c00::/32

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
2400:1c00::/32	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing

More specific routes42 total

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
2400:1c00:1::/48	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:2::/48	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:3::/48	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:4::/48	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:13::/48	AS3758	SingNet	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:1a::/48	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:1b::/48	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:1c::/48	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:1e::/48	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:1f::/48	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:20::/44	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:30::/45	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:64::/48	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:66::/48	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:70::/45	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:80::/43	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:a0::/43	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:f0::/44	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:100::/44	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:110::/44	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:120::/44	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:130::/44	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:140::/44	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:150::/44	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:160::/44	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:170::/44	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:170::/48	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:17f::/48	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:190::/44	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:1a0::/45	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:1d0::/45	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:258::/47	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	2026-11-05 22:25	2026-11-08 10:26	Announcing
2400:1c00:25a::/47	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	2026-11-05 22:25	2026-11-08 10:26	Announcing
2400:1c00:25c::/47	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:25e::/47	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:300::/44	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:480::/44	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:490::/44	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:580::/45	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:590::/45	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-08 10:26	Announcing
2400:1c00:258::/46	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-05 20:23	Stopped
2400:1c00:310::/45	AS45143	SINGTEL MOBILE INTERNET SERVICE PROVIDER Singapore	Singapore	Before monitoring	2026-11-05 20:23	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: 2400:1c00::/32
Country: Singapore
Allocation date: 2009-06-18
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.