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AS19518Rock Island Communications

United StatesRegistryARIN

As of 22nd October 2026, AS19518 (Rock Island Communications), a network registered in the United States with ARIN, originates 4 IPv4 prefixes covering 18.4k addresses and 3 IPv6 prefixes. By IPv4 address space that makes it the 7,382nd-largest of the 79,663 networks we see originating IPv4, and the 2,390th-largest of 18,476 in the United States. It is seen behind 8 upstream networks, most often AS137409 (GSL Networks Pty LTD) and AS6939 (Hurricane Electric LLC), and in front of 3 downstream networks. 57% 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

4

IPv6 prefixes

3

IPv4 addresses

18.4k

IPv6 /64s

197k

Upstream graph

The networks AS19518 is seen behind, one and two hops out, drawn from real AS paths.

AS19518Toward the internet core
Upstream graph for AS19518: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS19518Rock Island Commu…This networkAS6939Hurricane Electri…AS9002RETN LimitedAS11404Astound (fka. Wav…AS49544i3D.net B.VAS137409GSL Networks Pty …AS20130Depaul UniversityAS132337AxclusiveAS1299Arelion (fka. Tel…AS3257GTT Communication…AS3356Lumen (Level 3)AS8529Zain Omantel Inte…AS32590Valve Corporation

Networks observed one and two hops upstream of AS19518 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

32

adjacent networks

Upstreams
825%
Peers
2166%
Downstreams
39%

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

Upstreams of AS19518
NetworkCountryRelationshipPathsVantage pts
AS137409GSL Networks Pty LTDAUPeer53479
AS6939Hurricane Electric LLCUSPeer43682
AS11404Astound (fka. Wave Broadband)USPeer144
AS58511Swoop (Anycast Global Backbone)AUPeer112
AS9002RETN LimitedGBPeer112
AS49544i3D.net B.VNLPeer112
AS3130RGnet OUEEPeer81
AS35280F5 Networks SARLFRPeer81

Prefixes

The largest blocks AS19518 originates, widest first.

Largest prefixes originated by AS19518
PrefixAddressesVisibility
63.249.0.0/198.2k77/77
64.119.0.0/204.1k77/77
207.32.160.0/204.1k77/77
44.30.136.0/212k77/77
2602:2e5:666::/4865.5k × /6463/64
2605:1500:aaaa::/4865.5k × /6463/64
2605:1500:fffe::/4865.5k × /6463/64

Routing health

How AS19518'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

  • Valid57.1%4
  • Invalid0.0%0
  • No ROA42.9%3

Propagation

  • Globally propagated90% of full-feed peers or more100.0%7
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 4 prefixes

IPv6 — 3 prefixes

  • /4865.5k × /64100.0%3

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

No announcement by AS19518 started or stopped in this period.

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