subnet.im

AS397423Tier.Net Technologies LLC

United StatesRegistryARINTypeContent

As of 27th September 2026, AS397423 (Tier.Net Technologies LLC), a content network registered in the United States with ARIN, originates 312 IPv4 prefixes covering 94.2k addresses and 27 IPv6 prefixes. By IPv4 address space that makes it the 2,490th-largest of the 79,525 networks we see originating IPv4, and the 797th-largest of 18,428 in the United States. It is seen behind 17 upstream networks, most often AS40676 (Psychz Networks) and AS6461 (Zayo Bandwidth), and in front of 29 downstream networks. 81% 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

312

IPv6 prefixes

27

IPv4 addresses

94.2k

IPv6 /64s

4.6B

Upstream graph

The networks AS397423 is seen behind, one and two hops out, drawn from real AS paths.

AS397423Toward the internet core
Upstream graph for AS397423: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS397423Tier.Net Technolo…This networkAS174Cogent Communicat…AS3356Lumen (Level 3)AS6461Zayo BandwidthAS6939Hurricane Electri…AS40676Psychz NetworksAS1299Arelion (fka. Tel…AS151326DCConnect Communi…AS3549Lumen (fka. Globa…AS32590Valve CorporationAS2914NTT America, Inc.AS20130Depaul UniversityAS3257GTT Communication…

Networks observed one and two hops upstream of AS397423 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

117

adjacent networks

Upstreams
1715%
Peers
7161%
Downstreams
2925%

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

Upstreams of AS397423
NetworkCountryRelationshipPathsVantage pts
AS40676Psychz NetworksUSPeer10,374140
AS6461Zayo BandwidthUSPeer9,883111
AS174Cogent Communications, LLCUSPeer8,022122
AS3356Lumen (Level 3)USPeer5,889130
AS6939Hurricane Electric LLCUSPeer4,00463
AS25091IP-Max SACHPeer4164
AS49544i3D.net B.VNLPeer3832
AS137409GSL Networks Pty LTDAUPeer32481
AS7029Uniti (fka. Windstream)USPeer29633
AS35280F5 Networks SARLFRPeer1821

Prefixes

All 339

The largest blocks AS397423 originates, widest first.

Largest prefixes originated by AS397423
PrefixAddressesVisibility
45.42.144.0/221k81/81
45.59.160.0/221k80/81
64.93.32.0/221k80/81
64.205.220.0/221k80/81
82.41.60.0/221k80/81
82.41.76.0/221k80/81
82.41.84.0/221k80/81
82.41.92.0/221k80/81
143.20.180.0/221k80/81
173.0.8.0/221k80/81

Routing health

How AS397423'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

  • Valid81.4%276
  • Invalid0.0%0
  • No ROA18.6%63

Propagation

  • Globally propagated90% of full-feed peers or more100.0%339
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 312 prefixes

IPv6 — 27 prefixes

  • /324.3B × /643.7%1
  • /36268M × /643.7%1
  • /3933.6M × /643.7%1
  • /4016.8M × /643.7%1
  • /441M × /643.7%1
  • /46262k × /6411.1%3
  • /4865.5k × /6470.4%19

Recent changes

Announcements that started or stopped since 28th Aug 2026.

11 announced and 7 withdrawn in all; the most recent are shown.

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