subnet.im

AS6181Cincinnati Bell Telephone Company LLC

United StatesRegistryARINTypeEyeball

As of 23rd October 2026, AS6181 (Cincinnati Bell Telephone Company LLC), an access network registered in the United States with ARIN, originates 116 IPv4 prefixes covering 1.6M addresses and 2 IPv6 prefixes. By IPv4 address space that makes it the 347th-largest of the 79,652 networks we see originating IPv4, and the 80th-largest of 18,475 in the United States. It is seen behind 6 upstream networks, most often AS6939 (Hurricane Electric LLC) and AS3257 (GTT Communications Inc.), and in front of 50 downstream networks. 44% 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

116

IPv6 prefixes

2

IPv4 addresses

1.6M

IPv6 /64s

73B

Upstream graph

The networks AS6181 is seen behind, one and two hops out, drawn from real AS paths.

AS6181Toward the internet core
Upstream graph for AS6181: 12 neighbouring networks observed beyond it across 2 levels. The same networks are listed in the tables below.AS6181Cincinnati Bell T…This networkAS174Cogent Communicat…AS3257GTT Communication…AS3356Lumen (Level 3)AS6939Hurricane Electri…AS49544i3D.net B.VAS151326DCConnect Communi…AS6667Elisa OyjAS398465Rackdog LLCAS3549Lumen (fka. Globa…AS2914NTT America, Inc.AS18106Viewqwest Pte LtdAS20130Depaul University

Networks observed one and two hops upstream of AS6181 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

129

adjacent networks

Upstreams
65%
Peers
7357%
Downstreams
5039%

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

Upstreams of AS6181
NetworkCountryRelationshipPathsVantage pts
AS6939Hurricane Electric LLCUSPeer15,020118
AS3257GTT Communications Inc.USPeer2,30781
AS3356Lumen (Level 3)USPeer1,67049
AS174Cogent Communications, LLCUSPeer80444
AS49544i3D.net B.VNLPeer2732
AS137409GSL Networks Pty LTDAUPeer11

Prefixes

All 118

The largest blocks AS6181 originates, widest first.

Largest prefixes originated by AS6181
PrefixAddressesVisibility
50.5.0.0/1665.5k77/77
72.49.0.0/1665.5k77/77
74.83.0.0/1665.5k77/77
74.215.0.0/1665.5k77/77
131.241.0.0/1665.5k77/77
161.155.0.0/1665.5k77/77
208.102.0.0/1665.5k77/77
216.68.0.0/1665.5k77/77
50.5.0.0/1732.8k77/77
50.5.128.0/1732.8k77/77

Routing health

How AS6181'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

  • Valid44.1%52
  • Invalid0.0%0
  • No ROA55.9%66

Propagation

  • Globally propagated90% of full-feed peers or more100.0%118
  • Partially propagated40% to 90%0.0%0
  • Seen by few peersUnder 40%0.0%0

Prefix sizes

IPv4 — 116 prefixes

IPv6 — 2 prefixes

  • /2868.7B × /6450.0%1
  • /324.3B × /6450.0%1

Recent changes

Announcements that started or stopped since 23rd Sept 2026.

No announcement by AS6181 started or stopped in this period.

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