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AS19994Rackspace Hosting

United StatesRegistryARIN

As of 24th October 2026, AS19994 (Rackspace Hosting), a network registered in the United States with ARIN, originates 67 IPv4 prefixes covering 538k addresses and 1 IPv6 prefix. By IPv4 address space that makes it the 685th-largest of the 79,664 networks we see originating IPv4, and the 165th-largest of 18,488 in the United States. It is seen behind 1 upstream network, most often AS12200 (Rackspace Hosting), and in front of 1 downstream network. None of its announcements have a valid RPKI ROA. 97% of its routes reach at least 90% of full-feed peers, and 2 prefixes are also originated by another network.

At a glance

IPv4 prefixes

67

IPv6 prefixes

1

IPv4 addresses

538k

IPv6 /64s

4.3B

Upstream graph

The networks AS19994 is seen behind, one and two hops out, drawn from real AS paths.

AS19994Toward the internet core
Upstream graph for AS19994: 3 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS19994Rackspace HostingThis networkAS12200Rackspace HostingAS1299Arelion (fka. Tel…AS6461Zayo Bandwidth

Networks observed one and two hops upstream of AS19994 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
125%
Peers
250%
Downstreams
125%

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

Upstreams of AS19994
NetworkCountryRelationshipPathsVantage pts
AS12200Rackspace HostingUSPeer5,954138

Prefixes

All 68

The largest blocks AS19994 originates, widest first.

Largest prefixes originated by AS19994
PrefixAddressesVisibility
50.56.0.0/1732.8k75/76
50.57.0.0/1732.8k75/76
161.47.128.0/1732.8k75/76
173.203.0.0/1732.8k75/76
184.106.128.0/1732.8k75/76
23.253.0.0/1816.4k75/76
50.57.128.0/1816.4k75/76
74.200.192.0/1816.4k75/76
108.166.0.0/1816.4k75/76
161.47.0.0/1816.4k75/76

Routing health

How AS19994'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%68

Propagation

  • Globally propagated90% of full-feed peers or more97.1%66
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%2.9%2

Prefix sizes

IPv4 — 67 prefixes

IPv6 — 1 prefixes

  • /324.3B × /64100.0%1

Recent changes

Announcements that started or stopped since 24th Sept 2026.

  • Announced148.62.86.0/2428th Sept 2026
  • Withdrawn148.62.86.0/2428th Sept 2026

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