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AS21915Merced County Office of Education

United StatesRegistryARIN

As of 10th November 2026, AS21915 (Merced County Office of Education), a network registered in the United States with ARIN, originates 8 IPv4 prefixes covering 12.5k addresses. By IPv4 address space that makes it the 9,451st-largest of the 80,723 networks we see originating IPv4, and the 2,943rd-largest of 18,750 in the United States. It is seen behind 1 upstream network, most often AS2152 (CENIC - CalREN). None of its announcements have a valid RPKI ROA. 38% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

8

IPv6 prefixes

0

IPv4 addresses

12.5k

IPv6 /64s

0

Upstream graph

The networks AS21915 is seen behind, one and two hops out, drawn from real AS paths.

AS21915Toward the internet core
Upstream graph for AS21915: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS21915Merced County Off…This networkAS2152CENIC - CalRENAS3356Lumen (Level 3)AS6939Hurricane Electri…

Networks observed one and two hops upstream of AS21915 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

2

adjacent networks

Upstreams
150%
Peers
150%
Downstreams
00%

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

Upstreams of AS21915
NetworkCountryRelationshipPathsVantage pts
AS2152CENIC - CalRENUSPeer23376

Prefixes

The largest blocks AS21915 originates, widest first.

Largest prefixes originated by AS21915
PrefixAddressesVisibility
206.78.128.0/198.2k76/76
206.78.224.0/212k76/76
206.78.232.0/221k76/76
137.164.221.0/242561/76
137.164.222.0/242561/76
137.164.223.0/242561/76
137.164.224.0/242561/76
137.164.225.0/242561/76

Routing health

How AS21915'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

  • Valid0.0%0
  • Invalid0.0%0
  • No ROA100.0%8

Propagation

  • Globally propagated90% of full-feed peers or more37.5%3
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%62.5%5

Prefix sizes

IPv4 — 8 prefixes

Recent changes

Announcements that started or stopped since 11th Oct 2026.

No announcement by AS21915 started or stopped in this period.

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