subnet.im

AS11878tzulo, inc.

United StatesRegistryARINTypeContent

As of 12th November 2026, AS11878 (tzulo, inc.), a content network registered in the United States with ARIN, originates 196 IPv4 prefixes covering 116k addresses and 33 IPv6 prefixes. By IPv4 address space that makes it the 2,219th-largest of the 80,772 networks we see originating IPv4, and the 713th-largest of 18,759 in the United States. It is seen behind 8 upstream networks, most often AS6461 (Zayo Bandwidth) and AS36236 (NetActuate, Inc), and in front of 4 downstream networks. 83% of its announcements have a valid RPKI ROA; 1 is RPKI-invalid. Over 99% of its routes reach at least 90% of full-feed peers.

At a glance

IPv4 prefixes

196

IPv6 prefixes

33

IPv4 addresses

116k

IPv6 /64s

8.6B

Upstream graph

The networks AS11878 is seen behind, one and two hops out, drawn from real AS paths.

AS11878Toward the internet core
Upstream graph for AS11878: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS11878tzulo, inc.This networkAS3491PCCW Global (HK) …AS6079Astound (fka. RCN)AS6461Zayo BandwidthAS6830Liberty Global Eu…AS36236NetActuate, IncAS24516Virtutel Pty LtdAS58511Swoop (Anycast Gl…AS1299Arelion (fka. Tel…AS3356Lumen (Level 3)AS32590Valve CorporationAS2914NTT America, Inc.AS174Cogent Communicat…

Networks observed one and two hops upstream of AS11878 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

22

adjacent networks

Upstreams
836%
Peers
1045%
Downstreams
418%

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

Upstreams of AS11878
NetworkCountryRelationshipPathsVantage pts
AS6461Zayo BandwidthUSPeer7,667140
AS36236NetActuate, IncUSPeer5,792142
AS3491PCCW Global (HK) Ltd.HKPeer3,56984
AS6079Astound (fka. RCN)USPeer1,26658
AS6830Liberty Global Europe Holding B.V.EUPeer65132
AS46844SharktechUSPeer540141
AS32097WholeSale Internet, Inc.USPeer447139
AS53745Nordklett Inc.USPeer3232

Prefixes

All 229

The largest blocks AS11878 originates, widest first.

Largest prefixes originated by AS11878
PrefixAddressesVisibility
23.255.0.0/1732.8k78/78
173.253.0.0/1732.8k78/78
130.12.72.0/221k1/78
23.158.232.0/2425678/78
23.158.233.0/2425678/78
23.234.64.0/2425678/78
23.234.65.0/2425678/78
23.234.66.0/2425678/78
23.234.67.0/2425678/78
23.234.68.0/2425678/78

Routing health

How AS11878'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

  • Valid83.4%191
  • Invalid0.4%1
  • No ROA16.2%37

Propagation

  • Globally propagated90% of full-feed peers or more99.1%227
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.9%2

Prefix sizes

IPv4 — 196 prefixes

IPv6 — 33 prefixes

  • /324.3B × /643.0%1
  • /36268M × /6445.5%15
  • /4016.8M × /6442.4%14
  • /4865.5k × /649.1%3

Recent changes

Announcements that started or stopped since 13th Oct 2026.

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