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AS17203Beresford Municipal Telephone Company

United StatesRegistryARIN

As of 13th November 2026, AS17203 (Beresford Municipal Telephone Company), a network registered in the United States with ARIN, originates 6 IPv4 prefixes covering 1.5k addresses. By IPv4 address space that makes it the 31,771st-largest of the 80,813 networks we see originating IPv4, and the 7,213th-largest of 18,770 in the United States. It is seen behind 1 upstream network, most often AS13576 (SDN Communications). 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

6

IPv6 prefixes

0

IPv4 addresses

1.5k

IPv6 /64s

0

Upstream graph

The networks AS17203 is seen behind, one and two hops out, drawn from real AS paths.

AS17203Toward the internet core
Upstream graph for AS17203: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS17203Beresford Municip…This networkAS13576SDN CommunicationsAS1299Arelion (fka. Tel…AS6939Hurricane Electri…

Networks observed one and two hops upstream of AS17203 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 AS17203
NetworkCountryRelationshipPathsVantage pts
AS13576SDN CommunicationsUSPeer46878

Prefixes

The largest blocks AS17203 originates, widest first.

Largest prefixes originated by AS17203
PrefixAddressesVisibility
66.115.193.0/2425678/78
66.115.212.0/2425678/78
66.231.9.0/2425678/78
66.231.11.0/2425678/78
66.231.12.0/2425678/78
208.53.213.0/2425678/78

Routing health

How AS17203'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%6
  • Invalid0.0%0
  • No ROA0.0%0

Propagation

  • Globally propagated90% of full-feed peers or more100.0%6
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 6 prefixes

Recent changes

Announcements that started or stopped since 14th Oct 2026.

No announcement by AS17203 started or stopped in this period.

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