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AS27221Ardmore Telephone Company Inc.

United StatesRegistryARIN

As of 23rd October 2026, AS27221 (Ardmore Telephone Company Inc.), a network registered in the United States with ARIN, originates 19 IPv4 prefixes covering 15.1k addresses. By IPv4 address space that makes it the 8,445th-largest of the 79,666 networks we see originating IPv4, and the 2,683rd-largest of 18,482 in the United States. It is seen behind 2 upstream networks, most often AS13760 (Uniti Fiber Holdings Inc.) and AS11758 (IRIS Networks). 11% 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

19

IPv6 prefixes

0

IPv4 addresses

15.1k

IPv6 /64s

0

Upstream graph

The networks AS27221 is seen behind, one and two hops out, drawn from real AS paths.

AS27221Toward the internet core
Upstream graph for AS27221: 6 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS27221Ardmore Telephone…This networkAS11758IRIS NetworksAS13760Uniti Fiber Holdi…AS6461Zayo BandwidthAS6939Hurricane Electri…AS3356Lumen (Level 3)AS7029Uniti (fka. Winds…

Networks observed one and two hops upstream of AS27221 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

4

adjacent networks

Upstreams
250%
Peers
250%
Downstreams
00%

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

Upstreams of AS27221
NetworkCountryRelationshipPathsVantage pts
AS13760Uniti Fiber Holdings Inc.USPeer76977
AS11758IRIS NetworksUSPeer69474

Prefixes

The largest blocks AS27221 originates, widest first.

Largest prefixes originated by AS27221
PrefixAddressesVisibility
96.125.224.0/204.1k77/77
160.32.16.0/204.1k77/77
216.228.88.0/212k77/77
74.51.110.0/2351277/77
173.242.192.0/2351277/77
173.242.200.0/2351277/77
66.226.78.0/2425677/77
67.58.72.0/2425677/77
67.58.78.0/2425677/77
67.218.191.0/2425677/77

Routing health

How AS27221'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

  • Valid10.5%2
  • Invalid0.0%0
  • No ROA89.5%17

Propagation

  • Globally propagated90% of full-feed peers or more100.0%19
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 19 prefixes

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

No announcement by AS27221 started or stopped in this period.

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