asn.dev

Observed topology

AS9821 DOST-PH-AP Department of Science and Technology

Education APNIC

Upstreams 10 carry this network
Downstreams 13 this network carries
Adjacent (IPv4) 22
Adjacent (IPv6) 8
Upstream graph Who carries AS9821, and who carries them, drawn as a map up to the transit-free core. 2 exchanges Where AS9821 physically turns up to peer, and its address on each fabric.

Transit

Upstream networks

inferred

Networks observed carrying traffic for AS9821: the AS immediately before it in a routing path. Ranked by how many paths showed the relationship, which reflects how widely it is used, not how much traffic crosses it.

ASNetworkTypeFamiliesPaths seen
AS17639Converge ICT Solutions Inc.UnclassifiedIPv4 IPv6180
AS9658Eastern Telecoms Phils., Inc.UnclassifiedIPv4 IPv626
AS7660Asia Pacific Advanced Network - JapanUnclassifiedIPv4 IPv611
AS23855Singapore Advanced Research and Education NetworkUnclassifiedIPv44
AS24482SG.GSHostingIPv4 IPv64
AS37989DCS1 Pte. Ltd.HostingIPv4 IPv64
AS38001NewMedia Express Pte LtdHostingIPv43
AS4635Hong Kong Internet Exchange--Route Server 1UnclassifiedIPv42
AS24489Trans-Eurasia Information Network (TEIN2) - NorthUnclassifiedIPv41
AS61292Blix Group ASUnclassifiedIPv61

Transit

Downstream networks

All 13

Networks for which AS9821 was observed as the last hop before the origin, meaning it appears to provide them transit.

ASNetworkTypeFamiliesPaths seen
AS23862University of the Philippines DilimanUnclassifiedIPv4 IPv6185
AS135162eUP-University of the Philippines SystemUnclassifiedIPv4 IPv639
AS141196DEPARTMENT OF INFORMATION AND COMMUNICATION TECHNOLOGYUnclassifiedIPv432
AS133498De La Salle UniversityEducationIPv422
AS18188Ateneo de Manila UniversityUnclassifiedIPv410
AS45209University of the Philippines, Los Banos CampusEducationIPv45
AS58706Xavier SchoolUnclassifiedIPv45
AS131253De La Salle-LipaUnclassifiedIPv45
AS132796University of the Philippines Baguio CampusUnclassifiedIPv45
AS134414De La Salle-GreenhillsUnclassifiedIPv45

All 13 downstreams →

Adjacency

Adjacent networks

All 23

Every AS seen directly next to AS9821 in a routing path, in either direction.

ASNetworkTypeFamiliesPaths seen
AS17639Converge ICT Solutions Inc.UnclassifiedIPv4 IPv6320
AS23862University of the Philippines DilimanUnclassifiedIPv4 IPv6194
AS7660Asia Pacific Advanced Network - JapanUnclassifiedIPv4 IPv6144
AS9658Eastern Telecoms Phils., Inc.UnclassifiedIPv4 IPv645
AS135162eUP-University of the Philippines SystemUnclassifiedIPv4 IPv639
AS24489Trans-Eurasia Information Network (TEIN2) - NorthUnclassifiedIPv438
AS141196DEPARTMENT OF INFORMATION AND COMMUNICATION TECHNOLOGYUnclassifiedIPv432
AS133498De La Salle UniversityEducationIPv422
AS18188Ateneo de Manila UniversityUnclassifiedIPv410
AS45209University of the Philippines, Los Banos CampusEducationIPv45

All 23 adjacent →

Provenance

Where this comes from

Derived from routing tables collected at 2026-10-17 10:00 UTC by route-views2,rrc00, as seen from 75 BGP vantage points across 73.18M route entries. These are observations from those vantage points, not a complete or authoritative view of the internet.

Inferred from path position, not from any declaration by either party. A network appearing here is carrying these routes; whether that is a paid transit arrangement, a backup, or something else is not something routing data can tell you. Adjacency is not the same as peering. Being next to each other in a path covers paid transit, settlement-free peering and customer connections alike, and routing data cannot distinguish them. Treat this as "these networks exchange routes", nothing more specific.

Cross-check against RIPEstat or BGP.tools, which observe from a different and larger set of vantage points.