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AS21378PJSC Rostelecom

RussiaRegistryRIPE NCC

As of 11th November 2026, AS21378 (PJSC Rostelecom), a network registered in Russia with RIPE NCC, originates 7 IPv4 prefixes covering 26.6k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 6,111th-largest of the 80,743 networks we see originating IPv4, and the 277th-largest of 4,983 in Russia. It is seen behind 1 upstream network, most often AS12389 (PJSC Rostelecom), and in front of 3 downstream networks. Every one of its announcements has 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

7

IPv6 prefixes

1

IPv4 addresses

26.6k

IPv6 /64s

4.3B

Upstream graph

The networks AS21378 is seen behind, one and two hops out, drawn from real AS paths.

AS21378Toward the internet core
Upstream graph for AS21378: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS21378PJSC RostelecomThis networkAS12389PJSC RostelecomAS1299Arelion (fka. Tel…AS6939Hurricane Electri…

Networks observed one and two hops upstream of AS21378 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

8

adjacent networks

Upstreams
113%
Peers
450%
Downstreams
338%

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

Upstreams of AS21378
NetworkCountryRelationshipPathsVantage pts
AS12389PJSC RostelecomRUPeer703139

Prefixes

The largest blocks AS21378 originates, widest first.

Largest prefixes originated by AS21378
PrefixAddressesVisibility
80.246.64.0/198.2k76/76
84.42.0.0/198.2k76/76
80.246.64.0/212k76/76
84.42.0.0/212k76/76
84.42.8.0/212k76/76
84.42.16.0/212k76/76
84.42.24.0/212k76/76
2a02:2708::/324.3B × /6463/63

Routing health

How AS21378'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

  • Valid100.0%8
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%8
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 7 prefixes

IPv6 — 1 prefixes

  • /324.3B × /64100.0%1

Recent changes

Announcements that started or stopped since 12th Oct 2026.

No announcement by AS21378 started or stopped in this period.

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