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AS12042Fidium

United StatesRegistryARIN

As of 10th November 2026, AS12042 (Fidium), a network registered in the United States with ARIN, originates 109 IPv4 prefixes covering 168k addresses and 2 IPv6 prefixes. By IPv4 address space that makes it the 1,563rd-largest of the 80,733 networks we see originating IPv4, and the 452nd-largest of 18,751 in the United States. It is seen behind 5 upstream networks, most often AS6461 (Zayo Bandwidth) and AS174 (Cogent Communications, LLC), and in front of 40 downstream networks. None of its announcements have a valid RPKI ROA. 100% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

109

IPv6 prefixes

2

IPv4 addresses

168k

IPv6 /64s

8.6B

Upstream graph

The networks AS12042 is seen behind, one and two hops out, drawn from real AS paths.

AS12042Toward the internet core
Upstream graph for AS12042: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS12042FidiumThis networkAS57Northern Lights G…AS174Cogent Communicat…AS6461Zayo BandwidthAS6939Hurricane Electri…AS13576SDN CommunicationsAS2381WiscNetAS151326DCConnect Communi…AS2914NTT America, Inc.AS32590Valve CorporationAS1299Arelion (fka. Tel…AS20130Depaul UniversityAS132337Axclusive

Networks observed one and two hops upstream of AS12042 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

98

adjacent networks

Upstreams
55%
Peers
5354%
Downstreams
4041%

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

Upstreams of AS12042
NetworkCountryRelationshipPathsVantage pts
AS6461Zayo BandwidthUSPeer8,136113
AS174Cogent Communications, LLCUSPeer5,250102
AS6939Hurricane Electric LLCUSPeer31547
AS13576SDN CommunicationsUSPeer3333
AS57Northern Lights GigaPoPUSPeer66

Prefixes

All 111

The largest blocks AS12042 originates, widest first.

Largest prefixes originated by AS12042
PrefixAddressesVisibility
64.61.192.0/1816.4k75/76
209.23.128.0/1816.4k75/76
216.114.192.0/1816.4k75/76
68.232.224.0/198.2k75/76
69.24.160.0/198.2k75/76
156.47.96.0/198.2k75/76
209.240.224.0/198.2k75/76
64.255.128.0/204.1k75/76
66.220.208.0/204.1k75/76
67.218.16.0/204.1k75/76

Routing health

How AS12042'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%111

Propagation

  • Globally propagated90% of full-feed peers or more100.0%111
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 109 prefixes

IPv6 — 2 prefixes

  • /324.3B × /64100.0%2

Recent changes

Announcements that started or stopped since 12th Oct 2026.

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