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AS19635Sandhill Telephone Cooperative, Inc.

United StatesRegistryARIN

As of 11th November 2026, AS19635 (Sandhill Telephone Cooperative, Inc.), a network registered in the United States with ARIN, originates 85 IPv4 prefixes covering 21.8k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 6,817th-largest of the 80,747 networks we see originating IPv4, and the 2,266th-largest of 18,752 in the United States. It is seen behind 3 upstream networks, most often AS174 (Cogent Communications, LLC) and AS2711 (Spirit Communications). 53% of its announcements have a valid RPKI ROA; 1 is RPKI-invalid. 99% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

85

IPv6 prefixes

1

IPv4 addresses

21.8k

IPv6 /64s

4.3B

Upstream graph

The networks AS19635 is seen behind, one and two hops out, drawn from real AS paths.

AS19635Toward the internet core
Upstream graph for AS19635: 8 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS19635Sandhill Telephon…This networkAS174Cogent Communicat…AS2711Spirit Communicat…AS11426Charter Communica…AS151326DCConnect Communi…AS1299Arelion (fka. Tel…AS2914NTT America, Inc.AS7843Spectrum (Charter)AS398766TriCoLink, Inc.

Networks observed one and two hops upstream of AS19635 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

7

adjacent networks

Upstreams
343%
Peers
457%
Downstreams
00%

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

Upstreams of AS19635
NetworkCountryRelationshipPathsVantage pts
AS174Cogent Communications, LLCUSPeer3,25175
AS2711Spirit CommunicationsUSPeer1,96577
AS11426Charter Communications IncUSPeer1,17776

Prefixes

All 86

The largest blocks AS19635 originates, widest first.

Largest prefixes originated by AS19635
PrefixAddressesVisibility
24.233.192.0/2425676/76
24.233.193.0/2425676/76
24.233.194.0/2425676/76
24.233.195.0/2425676/76
24.233.196.0/2425676/76
24.233.197.0/2425676/76
24.233.198.0/2425676/76
24.233.199.0/2425676/76
38.83.177.0/2425675/76
38.83.178.0/2425675/76

Routing health

How AS19635'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

  • Valid53.5%46
  • Invalid1.2%1
  • No ROA45.3%39

Propagation

  • Globally propagated90% of full-feed peers or more98.8%85
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%1.2%1

Prefix sizes

IPv4 — 85 prefixes

IPv6 — 1 prefixes

  • /324.3B × /64100.0%1

Recent changes

Announcements that started or stopped since 12th Oct 2026.

No announcement by AS19635 started or stopped in this period.

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