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AS21541101Netlink

United StatesRegistryARIN

As of 23rd October 2026, AS21541 (101Netlink), a network registered in the United States with ARIN, originates 19 IPv4 prefixes covering 13.1k addresses. By IPv4 address space that makes it the 9,110th-largest of the 79,658 networks we see originating IPv4, and the 2,852nd-largest of 18,483 in the United States. It is seen behind 2 upstream networks, most often AS6461 (Zayo Bandwidth) and AS3356 (Lumen (Level 3)), and in front of 1 downstream network. 32% 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

19

IPv6 prefixes

0

IPv4 addresses

13.1k

IPv6 /64s

0

Upstream graph

The networks AS21541 is seen behind, one and two hops out, drawn from real AS paths.

AS21541Toward the internet core
Upstream graph for AS21541: 5 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS21541101NetlinkThis networkAS3356Lumen (Level 3)AS6461Zayo BandwidthAS3549Lumen (fka. Globa…AS2914NTT America, Inc.AS32590Valve Corporation

Networks observed one and two hops upstream of AS21541 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
229%
Peers
457%
Downstreams
114%

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

Upstreams of AS21541
NetworkCountryRelationshipPathsVantage pts
AS6461Zayo BandwidthUSPeer94177
AS3356Lumen (Level 3)USPeer59977

Prefixes

The largest blocks AS21541 originates, widest first.

Largest prefixes originated by AS21541
PrefixAddressesVisibility
208.186.48.0/204.1k77/77
64.194.64.0/212k77/77
64.194.160.0/212k77/77
64.194.160.0/2351277/77
64.194.166.0/2351277/77
64.195.220.0/2351277/77
64.194.68.0/2425677/77
64.194.70.0/2425677/77
64.194.71.0/2425677/77
64.194.163.0/2425677/77

Routing health

How AS21541'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

  • Valid31.6%6
  • Invalid0.0%0
  • No ROA68.4%13

Propagation

  • Globally propagated90% of full-feed peers or more100.0%19
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 19 prefixes

Recent changes

Announcements that started or stopped since 24th Sept 2026.

No announcement by AS21541 started or stopped in this period.

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