AS27676 — AS27676 - ALMA - Atacama Large Millimeter Array

AS27676 announces 2 IPv4 prefixes covering 2,304 addresses and 0 IPv6 prefixes.

About this network

AS27676 is operated by ALMA (Atacama Large Millimeter Array).

What it's used for

• The address space carries infrastructure for the Atacama Large Millimeter/submillimeter Array, a major astronomical observatory in northern Chile.
• The AS announces 2304 IPv4 addresses across 4 prefixes, with 4 observed neighbours, indicating a dedicated research network rather than a transit or access provider.

Notable

• Registrants for the 200.2.0.0/22, 200.2.4.0/23, and 200.2.6.0/23 prefixes are listed as "ALMA - Atacama Large Millimeter Array", while the 139.229.132.0/24 prefix is registered to "NSF'S NOIRLAB" with netname "CTIO".
• The address inventory is concentrated in the 200.2.0.0/22 block, with a single /24 from a different range.

CLASSIFICATION - after the card, on its own final line, emit exactly:

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 139.229.132.0/24
• 200.2.0.0/21

Upstream networks

• AS3549 Level 3 Parent, LLC
• AS6471 ENTEL CHILE S.A.
• AS20080 Florida International University
• AS11340 Red Universitaria Nacional

Adjacent networks

• AS3549 Level 3 Parent, LLC
• AS6471 ENTEL CHILE S.A.
• AS20080 Florida International University
• AS11340 Red Universitaria Nacional

Routing security

• RPKI: 0 valid, 0 invalid and 8 not-found announcements; 0 ROAs.
• ASPA: none published.
• IRR: 63% of announcements registered; 5 route objects.
• Listed in as-sets: AS-63529-AS-IMPORT-AS6939, AS-CTBC-TOOLS-10, AS-DURAND1-CUSTOMER, AS-FLRNET-AGGREGATE, AS-FLRNET-TRANSIT, AS-ITXCHILE, AS-TRANSITISP, AS-TRANSROUTE-SPEC, AS-UFLA-TRANSCUST, AS11340:AS-ALMA, AS11340:AS-REUNA, AS20965:AS-FROM-REDCLARA-TO-GEANT, AS263237:AS-CUSTOMERS, AS27986:AS-TRANSITISP.