subnet.im

AS21782Plateau Telecommunications Incorporated

United StatesRegistryARIN

As of 27th September 2026, AS21782 (Plateau Telecommunications Incorporated), a network registered in the United States with ARIN, originates 20 IPv4 prefixes covering 48.4k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 4,536th-largest of the 79,525 networks we see originating IPv4, and the 1,610th-largest of 18,428 in the United States. It is seen behind 3 upstream networks, most often AS6939 (Hurricane Electric LLC) and AS174 (Cogent Communications, LLC), and in front of 12 downstream networks. 81% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

20

IPv6 prefixes

1

IPv4 addresses

48.4k

IPv6 /64s

4.3B

Upstream graph

The networks AS21782 is seen behind, one and two hops out, drawn from real AS paths.

AS21782Toward the internet core
Upstream graph for AS21782: 8 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS21782Plateau Telecommu…This networkAS174Cogent Communicat…AS6939Hurricane Electri…AS30029Dobson Technologi…AS1299Arelion (fka. Tel…AS151326DCConnect Communi…AS18106Viewqwest Pte LtdAS20130Depaul UniversityAS3257GTT Communication…

Networks observed one and two hops upstream of AS21782 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

30

adjacent networks

Upstreams
310%
Peers
1550%
Downstreams
1240%

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

Upstreams of AS21782
NetworkCountryRelationshipPathsVantage pts
AS6939Hurricane Electric LLCUSPeer6,520138
AS174Cogent Communications, LLCUSPeer88841
AS30029Dobson Technologies - Transport and Telecom Solutions, LLCUSPeer19480

Prefixes

The largest blocks AS21782 originates, widest first.

Largest prefixes originated by AS21782
PrefixAddressesVisibility
74.50.128.0/198.2k81/81
64.90.144.0/204.1k81/81
64.127.144.0/204.1k81/81
67.209.192.0/204.1k81/81
159.198.16.0/204.1k81/81
199.45.128.0/204.1k81/81
207.246.224.0/204.1k81/81
66.199.240.0/212k81/81
67.209.208.0/212k81/81
68.66.88.0/212k81/81

Routing health

How AS21782'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

  • Valid81.0%17
  • Invalid0.0%0
  • No ROA19.0%4

Propagation

  • Globally propagated90% of full-feed peers or more100.0%21
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 20 prefixes

IPv6 — 1 prefixes

  • /324.3B × /64100.0%1

Recent changes

Announcements that started or stopped since 28th Aug 2026.

No announcement by AS21782 started or stopped in this period.

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