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AS6461Zayo Bandwidth

United StatesRegistryARINTypeT1

As of 13th October 2026, AS6461 (Zayo Bandwidth), a tier-1 transit network registered in the United States with ARIN, originates 228 IPv4 prefixes covering 1.8M addresses and 13 IPv6 prefixes. By IPv4 address space that makes it the 303rd-largest of the 79,585 networks we see originating IPv4, and the 72nd-largest of 18,443 in the United States. It is seen behind 80 upstream networks, most often AS32590 (Valve Corporation) and AS2914 (NTT America, Inc.), and in front of 2,591 downstream networks. 59% of its announcements have a valid RPKI ROA; 3 are RPKI-invalid. 98% of its routes reach at least 90% of full-feed peers, and 5 prefixes are also originated by another network.

At a glance

IPv4 prefixes

228

IPv6 prefixes

13

IPv4 addresses

1.8M

IPv6 /64s

17.4B

Upstream graph

The networks AS6461 is seen behind, one and two hops out, drawn from real AS paths.

AS6461Toward the internet core
Upstream graph for AS6461: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS6461Zayo BandwidthThis networkAS2152CENIC - CalRENAS2914NTT America, Inc.AS6667Elisa OyjAS25091IP-Max SAAS32590Valve CorporationAS3356Lumen (Level 3)AS38880Micron21 Datacent…AS49544i3D.net B.VAS6939Hurricane Electri…AS1299Arelion (fka. Tel…AS8298IPng Networks GmbHAS56662Marcin Gondek

Networks observed one and two hops upstream of AS6461 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

5,567

adjacent networks

Upstreams
801%
Peers
2,89652%
Downstreams
2,59147%

Networks carrying this one's traffic toward the rest of the internet. Listing the 40 seen on the most AS paths, of 80.

Upstreams of AS6461
NetworkCountryRelationshipPathsVantage pts
AS32590Valve CorporationUSPeer242,9177
AS2914NTT America, Inc.USPeer182,06855
AS6667Elisa OyjFIPeer149,6354
AS2152CENIC - CalRENUSPeer141,3121
AS25091IP-Max SACHPeer132,3945
AS3356Lumen (Level 3)USPeer131,66357
AS13030Init7 (Switzerland) Ltd.CHPeer130,2525
AS5413Wavenet LimitedGBPeer124,1962
AS3170VeloxServ Communications LtdGBPeer115,6572
AS3491PCCW Global (HK) Ltd.HKPeer105,32614

Prefixes

All 241

The largest blocks AS6461 originates, widest first.

Largest prefixes originated by AS6461
PrefixAddressesVisibility
208.184.0.0/15131k80/81
64.125.0.0/1665.5k80/81
66.46.0.0/1665.5k80/81
74.216.0.0/1665.5k80/81
128.177.0.0/1665.5k80/81
142.194.0.0/1665.5k80/81
144.83.0.0/1665.5k80/81
159.18.0.0/1665.5k80/81
167.217.0.0/1665.5k80/81
209.249.0.0/1665.5k80/81

Routing health

How AS6461'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

  • Valid58.9%142
  • Invalid1.2%3
  • No ROA39.8%96

Propagation

  • Globally propagated90% of full-feed peers or more97.9%236
  • Partially propagated40% to 90%0.8%2
  • Seen by few peersUnder 40%1.2%3

Prefix sizes

IPv4 — 228 prefixes

IPv6 — 13 prefixes

  • /324.3B × /6430.8%4
  • /36268M × /647.7%1
  • /4865.5k × /6461.5%8

Recent changes

Announcements that started or stopped since 13th Sept 2026.

45 announced and 27 withdrawn in all; the most recent are shown.

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