subnet.im

AS397423Tier.Net Technologies LLC

United StatesRegistryARINTypeContent

As of 11th November 2026, AS397423 (Tier.Net Technologies LLC), a content network registered in the United States with ARIN, originates 352 IPv4 prefixes covering 105k addresses and 32 IPv6 prefixes. By IPv4 address space that makes it the 2,355th-largest of the 80,747 networks we see originating IPv4, and the 757th-largest of 18,752 in the United States. It is seen behind 14 upstream networks, most often AS174 (Cogent Communications, LLC) and AS6461 (Zayo Bandwidth), and in front of 29 downstream networks. 79% of its announcements have a valid RPKI ROA; 4 are RPKI-invalid. 95% of its routes reach at least 90% of full-feed peers, and 3 prefixes are also originated by another network.

At a glance

IPv4 prefixes

352

IPv6 prefixes

32

IPv4 addresses

105k

IPv6 /64s

22.1B

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 UniversityAS132337Axclusive

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
1412%
Peers
7463%
Downstreams
2925%

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

Upstreams of AS397423
NetworkCountryRelationshipPathsVantage pts
AS174Cogent Communications, LLCUSPeer17,194122
AS6461Zayo BandwidthUSPeer10,246108
AS3356Lumen (Level 3)USPeer6,361126
AS6939Hurricane Electric LLCUSPeer3,31560
AS40676Psychz NetworksUSPeer1,94796
AS25091IP-Max SACHPeer4484
AS49544i3D.net B.VNLPeer4212
AS137409GSL Networks Pty LTDAUPeer40776
AS7029Uniti (fka. Windstream)USPeer39632
AS35280F5 Networks SARLFRPeer1981

Prefixes

All 384

The largest blocks AS397423 originates, widest first.

Largest prefixes originated by AS397423
PrefixAddressesVisibility
45.42.144.0/221k76/76
45.59.160.0/221k75/76
64.93.32.0/221k75/76
64.205.220.0/221k75/76
82.41.60.0/221k75/76
82.41.76.0/221k75/76
82.41.84.0/221k75/76
82.41.92.0/221k75/76
143.20.180.0/221k75/76
173.0.8.0/221k75/76

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

  • Valid79.2%304
  • Invalid1.0%4
  • No ROA19.8%76

Propagation

  • Globally propagated90% of full-feed peers or more95.1%365
  • Partially propagated40% to 90%2.9%11
  • Seen by few peersUnder 40%2.1%8

Prefix sizes

IPv4 — 352 prefixes

IPv6 — 32 prefixes

  • /324.3B × /6415.6%5
  • /36268M × /646.3%2
  • /3933.6M × /643.1%1
  • /4016.8M × /643.1%1
  • /441M × /643.1%1
  • /46262k × /649.4%3
  • /4865.5k × /6459.4%19

Recent changes

Announcements that started or stopped since 12th Oct 2026.

72 announced and 29 withdrawn in all; the most recent are shown.

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