subnet.im

AS12119ITV-3

United StatesRegistryARINTypeEyeball

As of 10th November 2026, AS12119 (ITV-3), an access network registered in the United States with ARIN, originates 101 IPv4 prefixes covering 251k addresses and 2 IPv6 prefixes. By IPv4 address space that makes it the 1,150th-largest of the 80,723 networks we see originating IPv4, and the 315th-largest of 18,750 in the United States. It is seen behind 3 upstream networks, most often AS6939 (Hurricane Electric LLC) and AS2914 (NTT America, Inc.), and in front of 2 downstream networks. 93% of its announcements have a valid RPKI ROA, and none are RPKI-invalid. 94% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

101

IPv6 prefixes

2

IPv4 addresses

251k

IPv6 /64s

4.3B

Upstream graph

The networks AS12119 is seen behind, one and two hops out, drawn from real AS paths.

AS12119Toward the internet core
Upstream graph for AS12119: 8 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS12119ITV-3This networkAS2914NTT America, Inc.AS3356Lumen (Level 3)AS6939Hurricane Electri…AS49544i3D.net B.VAS215859Hetzner Cloud - S…AS3549Lumen (fka. Globa…AS20130Depaul UniversityAS132337Axclusive

Networks observed one and two hops upstream of AS12119 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

11

adjacent networks

Upstreams
327%
Peers
655%
Downstreams
218%

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

Upstreams of AS12119
NetworkCountryRelationshipPathsVantage pts
AS6939Hurricane Electric LLCUSPeer5,208128
AS2914NTT America, Inc.USPeer1,82487
AS3356Lumen (Level 3)USPeer1,699138

Prefixes

All 103

The largest blocks AS12119 originates, widest first.

Largest prefixes originated by AS12119
PrefixAddressesVisibility
140.141.128.0/1732.8k76/76
140.177.64.0/1816.4k76/76
140.177.128.0/1816.4k76/76
134.49.0.0/198.2k76/76
140.177.160.0/198.2k76/76
140.177.192.0/198.2k76/76
140.177.224.0/198.2k76/76
142.204.64.0/198.2k76/76
142.204.96.0/198.2k76/76
209.128.192.0/198.2k76/76

Routing health

How AS12119'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

  • Valid93.2%96
  • Invalid0.0%0
  • No ROA6.8%7

Propagation

  • Globally propagated90% of full-feed peers or more94.2%97
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%5.8%6

Prefix sizes

IPv4 — 101 prefixes

IPv6 — 2 prefixes

  • /324.3B × /6450.0%1
  • /4865.5k × /6450.0%1

Recent changes

Announcements that started or stopped since 11th Oct 2026.

15 announced and 2 withdrawn in all; the most recent are shown.

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