2801:189:4::/48

Currently announced by AS272153 CORPORACION DE CIENCIA Y TECNOLOGIA PARA EL DESARROLLO DE LA INDUSTRIA NAVAL, MARITIMA Y FLUVIAL. COTECMAR, in the routed prefix 2801:189:4::/48.

Current ASN: AS272153; CORPORACION DE CIENCIA Y TECNOLOGIA PARA EL DESARROLLO DE LA INDUSTRIA NAVAL, MARITIMA Y FLUVIAL. COTECMAR
Routed prefix: 2801:189:4::/48; Most specific route covering this prefix
ASNs over time: 1; 2 announcement records
RIR allocation: LACNIC; Colombia · 2801:189::/44

Routing data · Nov 2, 2026, 06:27 UTC

ASN historyEvery routed prefix covering 2801:189:4::/48

Prefix	ASN	Name	Registered country	First seen (UTC)	Last seen (UTC)	Status
2801:189:4::/48	AS272153	CORPORACION DE CIENCIA Y TECNOLOGIA PARA EL DESARROLLO DE LA INDUSTRIA NAVAL, MARITIMA Y FLUVIAL. COTECMAR	Colombia	Before monitoring	2026-11-02 06:27	Announcing
2801:189::/44	AS272153	CORPORACION DE CIENCIA Y TECNOLOGIA PARA EL DESARROLLO DE LA INDUSTRIA NAVAL, MARITIMA Y FLUVIAL. COTECMAR	Colombia	Before monitoring	2026-10-31 08:19	Stopped

More specific routes0 total

No more specific routes inside this prefix.

Change logAll changes

Detected (UTC)	Prefix	Change	ASN	Name	Previous ASN	Country
2026-10-31 10:23	2801:189::/44	Withdrawal	AS272153	CORPORACION DE CIENCIA Y TECNOLOGIA PARA EL DESARROLLO DE LA INDUSTRIA NAVAL, MARITIMA Y FLUVIAL. COTECMAR	—	Colombia

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RIR allocation record

Registry: LACNIC
Allocated block: 2801:189::/44
Country: Colombia
Allocation date: 2022-05-24
Status: assigned

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.