subnet.im

AS46887Zayo (fka. Crown Castle)

United StatesRegistryARINTypeCarrier

As of 11th November 2026, AS46887 (Zayo (fka. Crown Castle)), a transit carrier registered in the United States with ARIN, originates 803 IPv4 prefixes covering 1.3M addresses and 260 IPv6 prefixes. By IPv4 address space that makes it the 385th-largest of the 80,747 networks we see originating IPv4, and the 92nd-largest of 18,752 in the United States. It is seen behind 5 upstream networks, most often AS6461 (Zayo Bandwidth) and AS47065 (USC / UFMG PEERING Research Testbed), and in front of 966 downstream networks. Under 1% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. Over 99% of its routes reach at least 90% of full-feed peers, and 7 prefixes are also originated by another network.

At a glance

IPv4 prefixes

803

IPv6 prefixes

260

IPv4 addresses

1.3M

IPv6 /64s

19.3B

Upstream graph

The networks AS46887 is seen behind, one and two hops out, drawn from real AS paths.

AS46887Toward the internet core
Upstream graph for AS46887: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS46887Zayo (fka. Crown …This networkAS1299Arelion (fka. Tel…AS3356Lumen (Level 3)AS6461Zayo BandwidthAS22616ZSCALER, INC.AS47065USC / UFMG PEERIN…AS13030Init7 (Switzerlan…AS16552Tiggee LLCAS3549Lumen (fka. Globa…AS2914NTT America, Inc.AS32590Valve CorporationAS6939Hurricane Electri…AS20473The Constant Comp…

Networks observed one and two hops upstream of AS46887 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

1,962

adjacent networks

Upstreams
50%
Peers
99151%
Downstreams
96649%

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

Upstreams of AS46887
NetworkCountryRelationshipPathsVantage pts
AS6461Zayo BandwidthUSPeer292,531138
AS47065USC / UFMG PEERING Research TestbedUSPeer5555
AS3356Lumen (Level 3)USPeer241
AS22616ZSCALER, INC.USAdjacent22
AS1299Arelion (fka. Telia Carrier)SEPeer21

Prefixes

All 1,063

The largest blocks AS46887 originates, widest first.

Largest prefixes originated by AS46887
PrefixAddressesVisibility
9.179.0.0/1665.5k76/76
9.191.0.0/1665.5k76/76
131.239.0.0/1665.5k76/76
138.123.0.0/1665.5k76/76
144.121.0.0/1665.5k76/76
149.70.0.0/1665.5k76/76
160.72.0.0/1665.5k76/76
165.158.0.0/1665.5k76/76
209.160.128.0/1732.8k76/76
144.121.0.0/1816.4k76/76

Routing health

How AS46887'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

  • Valid0.5%5
  • Invalid0.0%0
  • No ROA99.5%1,058

Propagation

  • Globally propagated90% of full-feed peers or more99.2%1,055
  • Partially propagated40% to 90%<0.1%1
  • Seen by few peersUnder 40%0.7%7

Prefix sizes

IPv4 — 803 prefixes

IPv6 — 260 prefixes

  • /324.3B × /641.5%4
  • /36268M × /642.7%7
  • /3933.6M × /642.7%7
  • /4016.8M × /640.8%2
  • /4865.5k × /6492.3%240

Recent changes

Announcements that started or stopped since 12th Oct 2026.

15 announced and 6 withdrawn in all; the most recent are shown.

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