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AS38732CMC Telecom Infrastructure Company

VietnamRegistryAPNIC

As of 11th November 2026, AS38732 (CMC Telecom Infrastructure Company), a network registered in Vietnam with APNIC, originates 40 IPv4 prefixes covering 12.5k addresses and 12 IPv6 prefixes. By IPv4 address space that makes it the 9,452nd-largest of the 80,743 networks we see originating IPv4, and the 34th-largest of 537 in Vietnam. It is seen behind 1 upstream network, most often AS45903 (CMC Telecom Infrastructure Company), and in front of 15 downstream networks. 90% of its announcements have a valid RPKI ROA; 4 are RPKI-invalid. 92% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

40

IPv6 prefixes

12

IPv4 addresses

12.5k

IPv6 /64s

101M

Upstream graph

The networks AS38732 is seen behind, one and two hops out, drawn from real AS paths.

AS38732Toward the internet core
Upstream graph for AS38732: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS38732CMC Telecom Infra…This networkAS45903CMC Telecom Infra…AS3491PCCW Global (HK) …AS9304HGC Global Commun…

Networks observed one and two hops upstream of AS38732 in real AS paths. A thicker line means more vantage points saw that adjacency, so weight tracks how well attested it is — not how much traffic it carries. Adjacency is an observation; whether it is a transit purchase or a settlement-free peering is an inference, and is labelled as one wherever we show it.

Neighbouring networks

32

adjacent networks

Upstreams
13%
Peers
1650%
Downstreams
1547%

Networks carrying this one's traffic toward the rest of the internet.

Upstreams of AS38732
NetworkCountryRelationshipPathsVantage pts
AS45903CMC Telecom Infrastructure CompanyVNPeer6,782139

Prefixes

All 52

The largest blocks AS38732 originates, widest first.

Largest prefixes originated by AS38732
PrefixAddressesVisibility
103.21.148.0/221k76/76
103.252.0.0/221k76/76
115.146.124.0/2351276/76
115.146.126.0/2351276/76
163.227.126.0/2351276/76
42.96.32.0/2425676/76
42.96.34.0/2425676/76
42.96.35.0/2425676/76
42.96.63.0/2425676/76
45.122.253.0/2425676/76

Routing health

How AS38732's own announcements validate against RPKI and how far they propagate. The same measures for the whole routing table are on the routing table in numbers.

RPKI origin validation

  • Valid90.4%47
  • Invalid7.7%4
  • No ROA1.9%1

Propagation

  • Globally propagated90% of full-feed peers or more92.3%48
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%7.7%4

Prefix sizes

IPv4 — 40 prefixes

IPv6 — 12 prefixes

  • /4016.8M × /6450.0%6
  • /4865.5k × /6450.0%6

Recent changes

Announcements that started or stopped since 12th Oct 2026.

No announcement by AS38732 started or stopped in this period.

Routing data derived from RouteViews MRT archives, BGPKIT relationship inference and public registry data.